science 

uses

for a changing world

U.S. DEPARTMENT OF THE INTERIOR 

U.S. GEOLOGICAL SURVEY

Principal Facts for About 500 Gravity Stations in the Vicinity of 

Amargosa Desert and Pahrump Valley, California and Nevada

By Robert L. Morin1 , Bruce A. Chuchel 1 , and Richard J. Blakely1

Open-File Report OF 99-31

Prepared in cooperation with the Nevada Operations Office, U.S. Department 

of Energy (Interagency Agreement DE-A108-96NV11967)

1999

U.S. DEPARTMENT OF THE INTERIOR 

BRUCE BABBITT, Secretary

U.S. GEOLOGICAL SURVEY 

Charles G. Groat, Director

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial 

standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for 

descriptive purposes only and does not imply endorsement by the U.S. Government.

1 U.S. Geological Survey, 345 Middlefield Road, = Menlo Park, CA 94025
TABLE OF CONTENTS

INTRODUCTION..............................................................^

GRAVITY REDUCTION................................................................................................................................... 1

ACKNOWLEDGMENTS...............................................................................................................^

REFERENCES CITED......................................................................................................................................7

ILLUSTRATIONS

FIGURE 1. INDEX MAP OF STUDY AREA...............................................................................................................3

FIGURE 2. STUDY AREA SHOWING LOCATIONS OF TOWNS AND SELECTED GEOGRAPHIC PLACE NAMES. ........................... 4

FIGURES. GRAVITY BASE STATION AT AMARGOSA VALLEY, NV............................................................................5

FIGURE 4. GRAVITY BASE STATION AT PAHRUMP, NV..........................................................................................6

TABLES

TABLE 1. PRINCIPAL FACTS OF GRAVITY STATIONS............................................................................................... 8
INTRODUCTION

During the winter and spring of 1998 gravity surveys were conducted in the vicinity of Amargosa 

Desert and Pahrump Valley to improve control of basement depth estimates. Basement depths are very useful 

in determining ground water flow and potential reservoir capacities. Approximately 530 new gravity stations 

were made. Amargosa Desert and Pahrump Valley are located along the California-Nevada border between 

Death Valley and Las Vegas, NV. The boundaries of the study area are 35° 45' to 37° 00' N. latitude and 

115° 30' to 117° 00' W. longitude. A map showing the location of the study area is shown in figure 1. A 

map showing the study area's local towns and geographic features is shown in figure 2. Two gravity base 

stations were used for control for these surveys. AMV is located at the post office building in Amargosa 

Valley, NV. This base was established by other workers prior to these field operations. The observed gravity 

of this station was calculated based on multiple ties to base stations on the Nevada Test Site and base 

stations on the Mount Charleston calibration loop. A second base station, NYECO was also used for these 

surveys. It is located next to the flag pole of the Nye County building in Pahrump, NV. This base was 

established with multiple ties to AMV. Descriptions of these base stations are made in figures 3 and 4.

GRAVITY REDUCTION

Conversion to milligals was made using factory calibration constants and a calibration factor which 

varies with each gravity meter and has been determined by multiple gravity readings over the Mt. Hamilton 

calibration loop east of San Jose, CA (Barnes and others, 1969). Observed gravity values were based on an 

assumed linear drift between successive base readings. Vertical and horizontal control was mostly provided by 

small portable Global Positioning Systems (GPS). A base GPS unit was used to record variations in the 

satellite signals. These variations were applied to the roving GPS unit. The horizontal locations calculated by 

GPS were as close as one could plot on a 1:24,000 scale map. Printed elevations on these maps, either bench 

marks or spot elevations, are preferred over GPS elevations, but comparisons of GPS to map elevations rarely 

exceed 10 feet. There have been some occasions when these differences are in the 50 foot range, but this is 

quite rare. When these wide ranges of elevation differences occur, interpolated elevations from the 30 meter 

Digital Elevation Model (DEM) are used for station elevations when no elevation is printed on the map. This 

data set also includes two closely spaced profiles in which the vertical and horizontal control were established 

with laser surveying equipment.

Field terrain corrections were made in the field which calculates to effect of the local terrain from the 

station to a radial distance of 68 m. Inner terrain corrections from 68 m to 0.59 km were calculated using 30 

m DEM's. Terrain corrections were computed for the area from a radial distance of 0.59 km from the station 

to a radial distance of 166.7 km with a FORTRAN program (Plouff, 1977) and a digital terrain model. These 

data were processed through an isostatic reduction program (Jachens and Roberts, 1981) in order to
suppress the effects of deep density distributions that buoyantly support the topography. The isostatic 

reduction assumes an Airy-Heiskanen model with the following parameters from the station to 166.7 km: 

density of topography above sea level, 2.67 g/cm3 ; crustal thickness at sea level, 25 km; density contrast 

across the base of the model crust, 0.4 g/cm3 . From 166.7 km to a point on the opposite side of the Earth, 

isostatic and terrain corrections were taken off maps by Karki (1961). These corrections were added to the 

output of the isostatic program of Jachens and Roberts (1981) to produce the isostatic correction.

Theoretical gravity at sea level is based on the Geodetic Reference System 1967 (GRS 67) 

(International Association of Geodesy, 1971, p. 58) for the shape of the spheroid. The datum for the 

observed gravity is the International Gravity Standardization Net 1971 (IGSN 71) (Morelli, 1974. p. 18). 

Observed gravities were calculated by adding meter drift and earth-tide corrections to the milligal equivalent 

meter readings. Free-air anomalies are calculated by subtracting the theoretical gravity from the observed 

gravity and adding the free-air correction as defined by Swick (1942, p. 65). Simple Bouguer anomalies are 

calculated by subtracting the Bouguer correction, which accounts for the attraction of rocks between the 

station and sea level using a rock density of 2.67 g/cm3 from the free-air anomaly. Complete Bouguer 

anomalies are calculated by adding the terrain correction and the curvature correction to the simple Bouguer 

anomaly. Isostatic anomalies are calculated by adding the isostatic correction to the complete Bouguer 

anomaly.

ACKNOWLEDGMENTS

We wish to acknowledge Bruce Chuchel and Peter Fahringer for their assistance in the field during 

the collection of these data.
126°00' 124°00' 122°00' 120P 00I 118°00' 116°00' 114°00' 112°00'

42°00'

40°00'

- 38°00'

- 36°00'

- 34°00'

32°00'

FIGURE 1. Index map of study area.
117° 116°45' 116°30' 116° 115°45' 115°30'

37°

36°45' f

36°30' f36°15' I36° -

35°45'

gravity stations

0 10 20 30 40 50 KM

FIGURE 2. Study area showing locations of towns, highways, and selected geographic place names.
LOCATION: Amargosa Valley Post Office

LATITUDE: 36° 31.54' LON

OBSERVED GRAVITY: 979,600.39 mGal ELE\

NAME: AMV

GITUDE: 116° 25. 14'

/ATION: 2344ft 714m

DATUM: ISGN 71

DESCRIPTION: The gravity base station is located at

office is located about 70 m west of Nevada Highway

the Amargosa Valley Post Office. The post

373 on Sage Road, about 13 km north of

the California-Nevada boarder. The meter was read on the front, south facing, covered concrete

porch of the post office about 2 m east of the door leading into the post office and about 0.2 m

from the south wall of the building. This location is just east of a set of windows and about 2 m

west of the east edge of the concrete porch..

Post

Office

* X ° '

\

N

I

gravity meter

^^ reading location 

*^

covered

porch

Sage Road

Hwy

373

FIGURE 3. Gravity base station at Amargosa Valley, NV
LOCATION: Nye County offices, Pahrump, NV

LATITUDE: 36° 13.30

OBSERVED GRAVITY: 979,554.18 mGal

NAME: NYECO

LONGITUDE: 115° 59.66

ELEVATION: 2632ft 802m

DATUM: IGSN 71

DESCRIPTION: The gravity base station is located on the west side of a sidewalk, adjacent to 

the flag pole in front of the Nye County offices in Pahrump, NV. The Nye County offices are 

located on the west side of Nevada Highway 160 about 1.1 miles NNW of the junction of Nevada 

Highways 160 and 372. The flag pole is located at the east side of the Nye County office building, 

about 20 ft from the building and about 10 ft west of the parking lot. The gravity station is an 

unmarked spot on the sidewalk which is located between the parking lot and the flag pole. The 

station is on the west edge of the sidewalk and next to an electrical box.

sidewalk

Nye County 

offices

gravity 

station

FIGURE 4. Gravity base station at Pahrump, NV
REFERENCES CITED

Barnes, D. F., Oliver, H.W., and Robbins, S.L., 1969, Standardization of gravimeter calibrations in the 

Geological Survey: Eos (American Geophysical Union Transactions), v. 50, no. 10, p. 626-527.

International Association of Geodesy, 1971, Geodetic reference system 1967: International Association of 

Geodesy Special Publication No. 3, 116p.

Jachens, R.C., and Roberts, C.W., 1981, Documentation of a FORTRAN program, 'isocomp', for computing 

isostatic residual gravity: U.S. Geological Survey Open-File Report 81-574, 26 p.

Karki, Pentti, Kivioja, Lassi, and Heiskanen, W.A., 1961, Topographic isostatic reduction maps for the world 

for the Hayford Zones 18-1, Airy-Heiskanen System, T=30 km: Publication of the Isostatic Institute 

of the International Association of Geodesy, no. 35, 5p., 20 pi.

Morelli, C.. ed, 1974, the International gravity standardization net 1971: International Association of 

Geodesy Special Publication no. 4, 194 p.

Plouff, Donald, 1977, Preliminary documentation for a FORTRAN program to compute gravity terrain 

corrections based on topography digitized on a geographic grid: U.S. Geological Survey Open-File 

Report 77-535, 45 p.

Swick, C.H., 1942, Pendulum gravity measurements and isostatic reductions: U.S. Coast and Geodetic 

Survey Special Publication no. 232, 82 p.
Table 1.- Principal facts of gravity stations

[DEC, degrees; MIN minutes; ELEV, elevation; FT, feet; MGAL, milligals; FAA, free-air anomaly; SBA, simple Bouguer

anomaly; CBA, complete Bouguer anomaly]

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

AMV 36

IJD 36

NYECO 36

98ASH001 36

98ASH002 36

98ASH003 36

98ASH004 36

98ASH005 36

98ASH006 36

98ASH007 36

98ASH008 36

98ASH009 36

98ASH010 36

98ASH011 36

98ASH012 36

98ASH013 36

98ASH014 36

98ASH015 36

98ASH016 36

98ASH017 36

98ASH018 36

98ASH019 36

98ASH020 36

98ASH021 36

98ASH022 36

98ASH023 36

98ASH024 36

98ASH025 36

98ASH026 36

98ASH027 36

98ASH028 36

98ASH029 36

98ASH030 36

98ASH031 36

98ASH032 36

98ASH033 36

98ASH034 36

98ASH035 36

98ASH036 36

98ASH037 36

98ASH038 36

98ASH039 36

98ASH040 36

98ASH041 36

98ASH042 36

98ASH043 36

98ASH044 36

98ASH045 36

98ASH046 36

98ASH047 36

31.540

44.550

13.300

18.450

18.770

19.310

18.890

18.040

20.510

19.950

19.330

20.870

20.620

19.890

20.280

21.260

21.740

22.070

23.230

23.180

23.600

25.280

26.150

27.220

27.250

26.730

25.990

24.140

24.070

24.610

24.610

24.790

25.510

23.500

23.820

24.060

23.160

22.990

22.380

21.640

20.910

19.850

19.260

18.540

18.090

17.680

17.280

17.640

17.210

16.830

LONGITUDE 

(DEC MIN)

116

116

115

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

25.140

38.730

59.660

24.200

23.560

20.670

20.100

20.290

20.020

19.600

19.590

18.050

17.050

16.270

15.160

17.610

16.200

18.050

18.060

17.170

16.940

17.400

17.370

17.670

18.550

19.090

19.730

16.970

15.340

15.360

15.930

20.270

21.330

25.910

26.520

27.160

29.740

30.200

30.530

30.750

31.060

31.580

31.450

32.110

32.500

32.880

33.490

34.080

34.300

34.350

ELEV 

(FT)

2344.0

2687 . 0

2632.0

2056.3

2043.0

2099.5

2164.0

2146.0

2106.0

2160.0

2217.0

2213.0

2277.3

2359.7

2319.5

2210.0

2247 . 0

2188.0

2218.0

2249.0

2274.0

2377.0

2584.2

2448.0

2368.5

2298.0

2206.5

2287.0

2355.3

2383.0

2385.0

2170.3

2143.0

2113.0

2133.0

2164.3

2628.0

2647.0

2837.7

3145.0

3039.4

2834.7

2709.0

2579.0

2646.5

2692.7

2801.0

2850.0

2875.0

2946.0

OBSERVED 

GRAVITY 

(MGAL)

979600.39

979603.63

979554.18

979599.78

979599.66

979597.20

979594.21

979597.73

979595.35

979591.81

979588.07

979594.27

979593.57

979591.68

979591.34

979595.39

979589.96

979598.22

979597.81

979594.10

979595.64

979598.32

979589.55

979599.86

979601.71

979597.10

979594.15

979597.51

979594.50

979595.35

979598.65

979597.17

979596.78

979601.68

979603.39

979604.97

979593.79

979591.46

979582.87

979564.15

979572.91

979584.23

979588.42

979583.20

979577.99

979574.87

979570.67

979567.01

979566.29

979559.72

FAA 

(MGAL)

-42.81

-26.09

-35.70

-51.64

-53.47

-51.39

-47.71

-44.66

-54.35

-52.01

-49.50

-45.89

-40.18

-33.28

-37.96

-45.61

-48.25

-46.02

-45.28

-46.00

-42.71

-32.76

-23.30

-27.34

-33.01

-43.50

-53.99

-40.40

-36.88

-34.21

-30.72

-52.65

-56.64

-51.67

-48.54

-44.36

-10.64

-10.94

-0.72

10.52

10.40

4.00

-2.78

-19.19

-17.41

-15.60

-9.04

-8.61

-6.36

-5.71

SBA TERRAIN CORRECTION CBA ISOSTATIC 

(MGAL) INNER TOTAL (MGAL) ANOMALY 

(MGAL) (MGAL)

-122.76

-117.74

-125.47

-121.77

-123.15

-123.00

-121.52

-117.85

-126.18

-125.68

-125.11

-121.37

-117.85

-113.76

-117.07

-120.99

-124.89

-120.64

-120.92

-122.70

-120.27

-113.84

-111.44

-110.83

-113.79

-121.88

-129.25

-118.40

-117.21

-115.48

-112.06

-126.67

-129.73

-123.73

-121.29

-118.18

-100.27

-101.22

-97.50

-96.75

-93.26

-92.68

-95.18

-107.15

-107.67

-107.43

-104.57

-105.81

-104.41

-106.18

0.00

0.01

0.01

0.02

0.00

0.01

0.01

0.01

0.00

0.01

0.01

0.01

0.01

0.02

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.02

0.49

0.05

0.10

0.00

0.00

0.00

0.00

0.00

0.01

0.00

0.00

0.00

0.00

0.00

0.21

0.12

0.16

0.31

0.70

0.28

0.07

0.01

0.01

0.01

0.02

0.04

0.07

0.04

0.06

0.61

1.31

0.38

0.36

0.26

0.26

0.30

0.23

0.25

0.25

0.29

0.38

0.46

0.51

0.30

0.48

0.24

0.22

0.29

0.32

0.39

0.86

0.34

0.34

0.20

0.16

0.34

0.78

0.80

0.55

0.12

0.12

0.33

0.37

0.42

1.45

1.65

2.43

2.86

4.08

2.64

1.39

0.94

0.84

0.87

0.99

1.11

1.30

1.37

-123.56

-118.09

-125.10

-122.17

-123.55

-123.52

-122.07

-118.36

-126.74

-126.24

-125.68

-121.90

-118.31

-114.16

-117.41

-121.51

-125.24

-121.22

-121.53

-123.25

-120.79

-114.32

-111.51

-111.39 '

-114.32

-122.53

-129.91

-118.90

-117.30

-115.55

-112.39

-127.36

-130.41

-124.20

-121.71

-118.57

-99.77

-100.52

-96.07

-94.96

-90.23

-91.04

-94.75

-107.14

-107.78

-107.52

-104.57

-105.70

-104.12

-105.84

-11.54

3.88

-8.81

-17.42

-18.44

-17.16

-15.70

-12.45

-19.46

-19.08

-18.89

-13.59

-9.62

-5.49

-7.94

-12.77

-15.54

-12.27

-11.95

-13.22

-10.38

-3.25

0.11

0.74

-2.61

-11.37

-19.48

-8.22

-5.81

-3.74

-0.94

-17 . 91

-20.99

-17.44

-14.98

-11.93

5.67

4.71

8.75

9.40

13.73

12.35

8.40

-4.45

-5.37

-5.40

-2.81

-3.92

-2.57

-4.51
Table 1.- Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98ASH048 36

98ASH049 36

98ASH050 36

98ASH051 36

98ASH052 36

98ASH053 36

98ASH054 36

98ASH055 36

98ASH056 36

98ASH057 36

98ASH058 36

98ASH059 36

98ASH060 36

98ASH061 36

98ASH062 36

98ASH063 36

98ASH064 36

98ASH065 36

98ASH066 36

98ASH067 36

98ASH068 36

98ASH069 36

98ASH070 36

98ASH071 36

98ASH072 36

98ASH073 36

98ASH074 36

98ASH075 36

98ASH076 36

98ASH077 36

98ASH078 36

98ASH079 36

98ASH080 36

98ASH081 36

98ASH082 36

98ASH083 36

98ASH084 36

98ASH085 36

98ASH086 36

98ASH087 36

98ASH088 36

98ASH089 36

98ASH090 36

98ASH091 36

98ASH092 36

98ASH093 36

98ASH094 36

98ASH095 36

98ASH096 36

98ASH097 36

98ASH098 36

98ASH099 36

98ASH100 36

16.900

16.300

15.530

16.300

15.730

16.920

17 . 560

15.740

15.380

18.310

16.210

19.610

21.550

22.200

21.660

21.870

23.650

23.930

24.210

24.680

25.050

25.240

25.550

25.480

24.010

24.280

24.620

23.680

11.690

12 . 170

12.690

12.960

11.620

10.950

10.280

9.620

9.940

8.400

6.630

5.260

4.050

3.360

2.980

2.370

1.760

1.260

1.290

54.010

53.320

52.720

52.130

51.540

50.940

LONGITUDE 

(DEC MIN)

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

32.880

33.470

33.890

31.900

32.400

31.360

30.800

31.120

30.440

33.450

24.840

25.310

25.330

26.220

27 . 540

26.290

29.820

30.250

30.640

30.170

29.590

28.810

27.030

26.130

24.630

24.070

22.980

24.190

24.380

25.250

26.070

26.490

26.160

26.820

27.470

28.100

24.670

25.550

26.190

27.060

28.630

31.680

33.850

34.400

35.030

35.930

37.320

47.520

48.440

49.210

49.960

50.730

51.490

ELEV 

(FT)

2683.7

2802.0

3012.1

2689.0

2748.0

2520.3

2443.3

2623.0

2572.0

2740.0

2035.7

2066.0

2085.0

2145.0

2308.0

2143.0

2454.0

2435.0

2490.7

2400.5

2316.0

2249.7

2194.7

2192.8

2147.3

2160.7

2165.0

2152.0

2237.8

2303.7

2363.8

2376.0

2482.5

2683.0

2899.3

3201.8

2455.0

2763.0

3129.5

3179.0

2952.0

3232.3

3560.8

3710.0

3889.0

4161.3

4238.0

3599.0

3418.0

3352.0

3375.0

3415.0

3458.0

OBSERVED 

GRAVITY 

(MGAL)

979576.78

979569.42

979557.59

979576.57

979573.52

979584.42

979590.13

979579.54

979580.59

979572.86

979605.66

979602.61

979600.21

979601.43

979602.96

979602.57

979597.88

979599.01

979596.29

979599.29

979600.87

979602.46

979600.58

979599.25

979596.95

979597.75

979601.64

979596.09

979592.17

979589.07

979585.34

979584.16

979572.93

979558.22

979542.92

979525.23

979567.90

979541.86

979524.52

979520.33

979537.90

979523.09

979512.23

979507.82

979497.69

979479.93

979475.71

979549.57

979563.18

979567.55

97^565.86

979560.67

979555.82

FAA 

(MGAL)

-13.41

-8.78

0.25

-12.26

-8.94

-21.16

-23 . 61

-14.69

-17 . 92

-14.06

-44 . 47

-49.56

-52.97

-47 . 04

-29.40

-45.61

-23 . 62

-24.68

-22 . 56

-28.72

-35.62

-40.54

-48.04

-49.44

-53.91

-52.24

-48.43

-53.85

-32.46

-30.06

-28.88

-29.30

-28.59

-23.49

-17.49

-5.79

-33.80

-28.67

-9.01

-6.58

-8.61

3.92

24.49

34.98

42.56

51.11

54.06

-8.08

-10.49

-11.46

-10.13

-10.71

-10.65

SBA TERRAIN CORRECTION CBA 

(MGAL) INNER TOTAL (MGAL) 

(MGAL)

-104.94

-104.35

-102.48

-103.97

-102.67

-107.12

-106.95

-104.15

-105.64

-107.51

-113.90

-120.03

-124.08

-120.20

-108.12

-118.70

-107.31

-107.73

-107.51

-110.59

-114.61

-117.27

-122.89

-124.23

-127.14

-125.93

-122.27

-127.25

-108.79

-108.63

-109.50

-110.34

-113.26

-115.00

-116.37

-114.99

-117.53

-122.90

-115.74

-115.00

-109.30

-106.32

-96.95

-91.55

-90.08

-90.81

-90.48

-130.83

-127.07

-125.78

-125.24

-127.18

-128.59

0.03

0.04

0.48

0.08

0.07

0.06

0.03

0.04

0.01

0.01

0.00

0.00

0.00

0.01

0.02

0.01

0.03

0.02

0.05

0.01

0.01

0.00

0.01

0.00

0.00

0.00

0.01

0.00

0.07

0.03

0.02

0.03

0.05

0.05

0.07

0.12

0.06

0.06

0.08

0.04

0.15.

0.02

0.18

0.11

0.12

0.39

0.28

0.20

0.03

0.02

0.01

0.01

0.01

1.01

1.38

2.07

0.89

1.07

0.83

0.77

0.85

0.79

0.97

0.46

0.37

0.36

0.42

0.99

0.48

1.12

1.24

1.31

0.85

0.63

0.47

0.24

0.17

0.17

0.13

0.11

0.16

0.71

0.65

0.65

0.69

0.83

1.01

1.26

1.78

1.00

1.24

1.39

1.21

1.34

1.48

2.51

2.77

3.18

4.30

5.25

1.17

1.15

1.05

0.91

0.86

0.87

-104.89

-103.96

-101.46

-104.04

-102.58

-107.21

-107.07

-104.25

-105.77

-107.51

-114.21

-120.44

-124.50

-120.58

-107.98

-119.02

-107.08

-107.37

-107.11

-110.62

-114.83

-117.63

-123.47

-124.88

-127.78

-126.61

-122.97

-127.89

-108.91

-108.83

-109.72

-110.52

-113.33

-114.95

-116.12

-114.30

-117.42

-122 . 64

-115.42

-114.88

-108.98

-105.94

-95.61

-89.98

-88.14

-87.79

-86.53

-130.84

-127.05

-125.86

-125.46

-127.46

-128.86

ISOSTATIC 

ANOMALY 

(MGAL)

-3.10

-2.63

-0.58

-2.29

-1.18

-5.01

-4.47

-2.56

-4.03

-5.27

-10.70

-15.48

-18.59

-14.62

-2.68

-13.23

-1.38

-1.64

-1.35

-4.48

-8.33

-10.82

-15.96

-17.16

-20.41

-18.91

-14.69

-20 . 54

-7.41

-7.34

-8.17

-8.91

-12.30

-14.43

-16.15

-14.84

-16.92

-23.20

-17.22

-17.73

-12.94

-11.02

-1.44

3.65

4.90

4.70

5.69

2.85

5.67

5.99

5.46

2.55

0.20
Table 1. Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98ASH101 36

98ASH102 36

98ASH103 36

98ASH104 36

98ASH105 36

98ASH106 36

98ASH107 36

98ASH108 36

98ASH109 36

98ASH110 36

98ASH111 36

98ASH112 36

98ASH113 36

98ASH114 36

98ASH115 36

98ASH116 36

98ASH117 36

98ASH118 36

98ASH119 36

98ASH120 36

98ASH121 36

98ASH122 36

98ASH123 36

98ASH124 36

98ASH125 36

98ASH126 36

98ASH127 36

98ASH128 36

98ASH129 36

98ASH130 36

98ASH131 36

98ASH132 36

98ASH133 36

98ASH134 36

98ASH135 36

98ASH136 36

98ASH137 36

98ASH138 36

98ASH139 36

98ASH140 36

98ASH141 36

98ASH142 36

98ASH143 36

98ASH144 36

98ASH145 36

98ASH146 36

98ASH147 36

98ASH148 36

98ASH149 36

98ASH150 36

98ASH151 36

98ASH152 36

98ASH153 36

50.360

49.410

48.420

47.850

46.560

45.030

44.280

42.130

40.900

39.650

39.820

40.080

39.150

38.350

37.500

36.800

36.070

35.290

45.000

44.330

43.980

43.200

43.040

43.250

43.900

44.550

45.850

46.690

47.480

47.680

48.460

36.750

37.500

38.270

38.720

48.110

48.050

47.450

46.260

47.060

46.850

45.490

44.880

44.220

42.700

41.870

38.770

38.230

37.360

36.510

35.570

40.780

42.350

LONGITUDE 

(DEC MIN)

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

52.230

53.450

54.790

55.190

55.940

56.150

58.090

58.110

57.650

56.430

55.610

54.570

57.250

56.970

56.800

56.750

56.620

56.550

55.240

54.720

54.200

53.680

52.500

51.450

50.800

50.080

50.120

50.400

50.880

48.860

49.000

32.520

32.520

32.520

33.820

46.410

47.190

47.650

48.420

46.870

45.610

44.820

44.470

44.170

43.560

43.320

43.110

42.480

42.610

42.730

42.900

41.580

40.820

ELEV 

(FT)

3512.0

3606.0

3920.0

4066.3

4084.7

3407.0

2651.7

1645.3

1220.7

700.2

892.5

1330.0

632.3

390.8

219.1

117.4

-35.8

-191.0

3660.0

3551.0

3786.3

4301.3

4306.0

4029.0

3806.3

3561.8

3350.0

3320.0

3348.0

3108.0

3140.0

2421.7

2424.7

2455.0

2465.0

2940.3

2992.3

3001.7

3128.0

2941.7

2874.0

2810.5

2782.3

2754.0

2692.3

2655.0

2661.3

2624.0

2685.3

2838.0

3191.9

2591.3

2625.0

OBSERVED 

GRAVITY 

(MGAL)

979550.22

979546.81

979535.98

979531.67

979540.56

979585.69

979631.68

979689.79

979709.79

979739.76

979728.26

979704.21

979741.11

979749.83

979753.98

979755.02

979760.82

979767.46

979570.85

979578.04

979563.99

979531.81

979532.03

979547.26

979555.86

979564.04

979566.68

979566.20

979565.37

979582.13

979575.55

979607.07

979603.36

979602.00

979604.82

979584.00

979583.41

979586.14

979579.78

979587.60

979589.61

979594.80

979596.46

979596.63

979603.83

979613.35

979625.61

979625.01

979618.50

979610.00

979588.99

979616.34

979599.75

FAA 

(MGAL)

-10.33

-3.53

16.59

26.86

39.34

22.97

-0.97

-34.40

-52.55

-69.73

-63.39

-46.67

-74.05

-86.89

-97.66

-105.18

-112.74

-119.57

31.96

29.87

38.45

55.81

56.70

45.59

32.31

16.57

-2.58

-7.10

-6.44

-12.53

-17.23

-36.34

-40.85

-40.47

-37.36

-27.05

-22.67

-18.18

-10.95

-21.80

-25.85

-24.67

-24.78

-26.32

-22.72

-15.51

1.81

-1.51

-1.00

6.08

19.70

-16.94

-32.63

SBA TERRAIN CORRECTION CBA ISOSTATIC 

(MGAL) INNER TOTAL (MGAL) ANOMALY 

(MGAL) (MGAL)

-130.11

-126.52

-117.11

-111.83

-99.97

-93.23

-91.41

-90.51

-94.19

-93.61

-93.83

-92.03

-95.61

-100.22

-105.13

-109.18

-111.52

-113.06

-92.87

-91.24

-90.69

-90.89

-90.16

-91.83

-97.50

-104.91

-116.84

-120.33

-120.62

-118.53

-124.32

-118.94

-123.55

-124.20

-121.43

-127.33

-124.72

-120.56

-117.63

-122.13

-123.88

-120.53

-119.67

-120.25

-114.55

-106.06

-88.95

-91.01

-92 . 59

-90.71

-89.16

-105.32

-122 . 16

0.01

0.02

0.31

0.63

0.75

0.48

0.18

0.06

0.05

0.07

0.12

0.58

0.04

0.05

0.04

0.06

0.04

0.02

0.29

0.41

0.38

0.31

0.17

0.09

0.04

0.03

0.02

0.02

0.01

0.00

0.00

0.00

0.01

0.00

0.00

0.01

0.01

0.02

0.04

0.03

0.01

0.01

0.01

0.01

0.00

0.01

0.15

0.02

0.03

0.05

0.33

0.02

0.02

0.94

1.23

2.53

3.04

4.36

4.02

4.60

3.84

3.76

4.63

5.45

7.74

3.59

3.73

3.63

3.52

3.58

3.67

3.38

3.86

3.87

5.58

4.55

3.27

2.15

1.48

1.10

1.02

0.96

0.75

0.71

0.15

0.18

0.16

0.18

0.68

0.65

0.69

0.84

0.70

0.67

0.61

0.58

0.57

0.61

0.67

0.90

0.73

0.85

1.10

1.97

0.46

0.39

-130.33

-126.46

-115.82

-110.05

-96.88

-90.35

-87.76

-87.32

-90.92

-89.28

-88.75

-84.82

-92.29

-96.66

-101.60

-105.71

-107.92

-109.29

-90.68

-88.55

-88.04

-86.62

-86.92

-89.82

-96.57

-104.60

-116.86

-120.43

-120.78

-118.85

-124.69

-119.67

-124.25

-124.93

-122.15

-127.68

-125.11

-120.91

-117.86

-122.46

-124.21

-120.91

-120.08

-120.65

-114.90

-106.34

-89.00

-91.22

-92.70

-90.61

-88.27

-105.79

-122.71

-2.14

0.15

9.13

14.00

25.11

29.33

30.70

27. 97

22.69

22.73

23.56

27.95

19.09

13.73

7.89

3.05

0.11

-1.98

29.06

30.23

30.22

30.58

30.20

27.79

22.06

15.16

4.80

2.41

3.14

5.72

0.98

-5.28

-9.10

-9.00

-6.05

-2.14

0.22

3.46

4.65

1.50

-0.37

1.16

1.19

-0.20

3.61

11.16

24.77

22.06

19.56

20.70

22.09

10.74

-4.00

10
Table 1. Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98ASH154 36

98ASH155 36

98ASH156 36

98ASH157 36

98NYE001 36

98NYE002 36

98NYE003 36

98NYE004 36

98NYE005 36

98NYE006 36

98NYE007 36

98NYE008 36

98NYE009 36

98NYE010 36

98NYE011 36

98NYE012 36

98NYE013 36

98NYE014 36

98NYE015 36

98NYE016 36

98NYE017 36

98NYE018 36

98NYE019 36

98NYE020 36

98NYE021 36

98NYE022 36

98NYE023 36

98NYE024 36

98NYE025 36

98NYE026 36

98NYE027 36

98NYE028 36

98NYE029 36

98NYE030 36

98NYE031 36

98NYE032 36

98NYE033 36

98NYE034 36

98NYE035 36

98NYE036 36

98NYE037 36

98NYE038 36

98NYE039 36

98NYE040 36

98NYE041 36

98NYE042 36

98NYE043 36

98NYE044 36

98NYE045 36

98NYE046 36

98NYE047 36

98NYE048 36

98NYE049 36

26.920

26.970

26.850

26.880

44.350

44.354

44.368

44.389

44.408

44.429

44.449

44.467

44.487

44.506

44.526

44.546

44.565

44.583

44.604

44 . 619

44.614

44.594

44.575

44.555

44.536

44.516

44.496

44.478

44.458

44.439

44.418

44.399

44.379

44.341

42.313

42.323

42.336

42.351

42.364

42.379

42.396

42.411

42.424

42.438

42.453

42.467

42.481

42.496

42 . 514

42.528

42 . 540

42.554

42 . 567

LONGITUDE 

(DEC MIN)

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

24.330

27.710

26.460

25.270

38.488

38.464

38.444

38.408

38.375

38.342

38.309

38.277

38.244

38.211

38.177

38.143

38.111

38.078

38.045

38.021

38.026

38.061

38.093

38.128

38.162

38.193

38.226

38.259

38.293

38.326

38.358

38.390

38.425

38.496

35.361

35.344

35.333

35.322

35.313

35.303

35.295

35.286

35.277

35.266

35.255

35.243

35.235

35.225

35.220

35.209

35.196

35.187

35.177

ELEV 

(FT)

2191.3

2250.7

2213.3

2232.0

2679.7

2680.0

2682.2

2685.8

2689.9

2693.7

2697.7

2702.1

2706.2

2710.6

2715.9

2721.8

2727.4

2732.2

2738.9

2743 . 5

2741.8

2735.4

2730.1

2724.2

2718.4

2713.6

2708.1

2704.4

2699.9

2695.4

2691.0

2688.1

2684.2

2678.4

2571.3

2575.8

2578.3

2581.4

2582.7

2586.0

2589.4

2592.9

2595.7

2598.3

2601.4

2604.9

2608.5

2613.9

2617 . 6

2622.4

2627.3

2631.3

2635.3

OBSERVED 

GRAVITY 

(MGAL)

979595.35

979597.65

979600.53

979596.10

979603.55

979603.73

979603.83

979604.06

979604.27

979604.39

979604.54

979604.58

979604.64

979604.66

979604.65

979604.48

979604.31

979604.13

979603.87

979603.67

979603.78

979603.97

979604.22

979604.43

979604.61

979604.62

979604.68

979604.63

979604.54

979604.44

979604.35

979604.14

979603.94

979603.52

979598.65

979598.16

979597.85

979597.50

979597.29

979596.89

979596.62

979596.18

979595.88

979595.56

979595.26

979594.96

979594.70

979594.27

979594.00

979593.64

979593.13

979592.67

979592.21

FAA 

(MGAL)

-55.56

-47.74

-48.21

-50.92

-26.57

-26.36

-26.09

-25.55

-24.98

-24.53

-24.03

-23 . 61

-23 . 19

-22.79

-22.33

-21.97

-21.63

-21.39

-21.05

-20 . 84

-20.88

-21.26

-21.48

-21.80

-22 . 15

-22 . 56

-22.99

-23.36

-23 . 84

-24.34

-24.81

-25.26

-25.80

-26.71

-38.72

-38.80

-38.90

-38.98

-39.08

-39.20

-39 . 18

-39.30

-39.35

-39.46

-39.48

-39.48

-39.42

-39.37

-39.30

-39.24

-39.30

-39.40

-39 . 52

SBA TERRAIN CORRECTION CBA 

(MGAL) INNER TOTAL (MGAL) 

(MGAL)

-130.30

-124.51

-123.70

-127.05

-117.97

-117.77

-117.56

-117.15

-116.72

-116.40

-116.04

-115.77

-115.49

-115.24

-114.96

-114.80

-114.65

-114.57

-114.46

-114.41

-114.39

-114.55

-114.59

-114.71

-114.86

-115.11

-115.35

-115.59

-115.92

-116.26

-116.59

-116.94

-117.35

-118.06

-126.42

-126.65

-126.84

-127 . 02

-127.16

-127.40

-127.49

-127.74

-127.88

-128.08

-128.20

-128.32

-128.38

-128.52

-128.58

-128.68

-128.91

-129.15

-129.40

0.02

0.01

0.01

0.00

0.00

0.00

0.01

0.01

0.01

0.01

0.01

0.01

0.01

0.02

0.03

0.04

0.06

0.09

0.14

0.23

0.19

0.12

0.08

0.05

0.03

0.02

0.02

0.01

0.01

0.01

0.01

0.01

0.01

0.00

0.01

0.01

0.01

0.01

0.01

0.01

0.02

0.02

0.02

0.02

0.02

0.03

0.03

0.03

0.03

0.04

0.04

0.05

0.06

0.10

0.20

0.15

0.09

0.57

0.58

0.59

0.59

0.60

0.61

0.61

0.62

0.63

0.65

0.67

0.69

0.71

0.76

0.82

0.92

0.88

0.80

0.74

0.70

0.67

0.65

0.64

0.62

0.62

0.61

0.60

0.60

0.59

0.57

0.42

0.42

0.43

0.43

0.44

0.44

0.46

0.45

0.46

0.46

0.47

0.49

0.49

0.49

0.49

0.50

0.50

0.51

0.52

-131.01

-125.14

-124.37

-127.79

-118.35

-118.15

-117.93

-117.51

-117.08

-116.76

-116.39

-116.11

-115.82

-115.55

-115.26

-115.08

-114.91

-114.78

-114.61

-114.46

-114.48

-114.73

-114.82

-114.98

-115.15

-115.42

-115.67

-115.93

-116.27

-116.62

-116.95

-117.31

-117.71

-118.44

-126.92

-127.15

-127.34

-127.52

-127.66

-127.88

-127.97

-128.21

-128.36

-128.54

-128.67

-128.77

-128.83

-128.97

-129.03

-129.12

-129.35

-129.58

-129.81

ISOSTATIC 

ANOMALY 

(MGAL)

-21.86

-17 . 04

-15.91

-18.95

3.44

3.65

3.88

4.34

4.80

5.17

5.56

5.88

6.21

6.51

6.83

7.04

7.23

7.40

7.61

7.79

7.76

7.47

7.34

7.14

6.95

6.65

6.37

6.07

5.70

5.31

4.95

4.56

4.12

3.33

-7.03

-7.24

-7.42

-7.59

-7.72

-7.91

-7.98

-8.20

-8.34

-8.49

-8.60

-8.68

-8.72

-8.83

-8.88

-8.95

-9.16

-9.38

-9.58

11
Table 1. Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98NYE050 36

98NYE051 36

98NYE052 36

98NYE053 36

98NYE054 36

98NYE055 36

98NYE056 36

98NYE057 36

98NYE058 36

98NYE059 36

98NYE060 36

98NYE061 36

98NYE062 36

98NYE063 36

98NYE064 36

98NYE065 36

98NYE066 36

98NYE067 36

98NYE068 36

98NYE069 36

98NYE070 36

98NYE071 36

98NYE072 36

98NYE073 36

98NYE074 36

98NYE075 36

98NYE076 36

98NYE077 36

98NYE078 36

98NYE079 36

98NYE080 36

98NYE081 36

98NYE082 36

98NYE083 36

98NYE084 36

98NYE085 36

98NYE086 36

98NYE087 36

98NYE088 36

98NYE089 36

98NYE090 36

98NYE091 36

98NYE092 36

98NYE093 36

98NYE094 36

98NYE095 36

98NYE096 36

98NYE097 36

98NYE098 36

98NYE099 36

98NYE100 36

98NYE101 36

98NYE102 36

42.586

42.410

41.900

41.480

40.830

40.310

39.750

39.900

40.420

41.290

42.680

43.190

44.020

43.730

39.860

38.830

38.520

38.170

37.920

37.890

37.890

37.820

37.430

37.230

12 . 940

12.310

12.250

11.520

10.530

10.440

11.610

11.420

10.520

9.670

8.770

7.900

8.780

10.450

11.150

11.970

12.730

13.490

14.220

14.910

12.390

12.220

9.750

9.660

8.770

7.900

6.990

6.130

6.140

LONGITUDE 

(DEC MIN)

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

35.173

35.570

34.710

33.900

32.510

30.700

28.500

29.100

31.220

33.410

35.950

36.800

38.120

37.740

28.830

24.790

23.540

22.100

21.080

20.010

19.500

18.990

18.080

17.560

57.440

57.530

58.690

59.270

59.690

58.600

58.000

56.480

56.460

56.430

58.460

56.280

55.330

55.400

54.840

54.560

54.190

53.770

53.390

52.690

52.690

53.480

54.320

55.350

54.250

54.240

53.170

53.140

54.120

ELEV 

(FT)

2642.2

2571.6

2580.5

2599.3

2582.0

2551.8

2584.3

2576.7

2543.0

2596.7

2581.7

2608.8

2659.3

2646.6

2604.0

2649.7

2649.5

2673.3

2749.7

2830.0

2852.7

2860.3

2824.3

2818.0

2931.1

2870.3

2713.0

2649.0

2622.0

2652.5

2723.0

2864.9

2720.0

2694.0

2638.0

2691.0

2711.2

2797.0

2970.8

3195.9

3474.2

3761.5

4042 . 0

4386.0

3722.2

3430.5

2785.0

2724.5

2753.0

2769.0

2903.6

2895.6

2794.3

OBSERVED 

GRAVITY 

(MGAL)

979591.61

979600.34

979595.65

979593.49

979592.93

979593.62

979595.77

979595.13

979593.63

979592.11

979602.34

979608.30

979603.95

979603.20

979595.62

979583.34

979582.06

979589.65

979591.23

979587.37

979585.69

979585.25

979588.23

979586.80

979537.98

979537.27

979545.65

979539.78

979533.27

979531.21

979538.81

979533.41

979533.05

979527.37

979527.99

979523.40

979526.99

979533.57

979534.29

979525.02

979510.13

979492.65

979476.22

979457.83

979495.81

979512.14

979538.52

979530.07

979533.63

979530.69

979528.66

979522.65

979522.61

FAA 

(MGAL)

-39.50

-37.14

-40.26

-40.05

-41.30

-42 . 69

-36.68

-38.25

-43 . 67

-41.40

-34.58

-26.81

-27.61

-29.14

-35.14

-41.63

-42.48

-32.15

-23 . 03

-19.29

-18.84

-18.46

-18.31

-20.04

-23.26

-28.78

-35.10

-45.94

-53 . 57

-52.63

-40.09

-31.87

-44.56

-51.47

-54 . 82

-53 . 18

-48.95

-36.70

-20.64

-9.93

0.26

8.70

17.59

30.55

9.74

-1.11

-31.87

-45.88

-38.37

-38.55

-26.62

-32.15

-41.73

SBA TERRAIN CORRECTION CBA ISOSTATIC 

(MGAL) INNER TOTAL (MGAL) ANOMALY 

(MGAL) (MGAL)

-129.61

-124.85

-128.27

-128.70

-129.36

-129.73

-124.82

-126.13

-130.40

-129.96

-122 . 64

-115.79

-118.31

-119.40

-123.95

-132.00

-132.85

-123.33

-116.81

-115.81

-116.13

-116.02

-114.63

-116.15

-123.23

-126.68

-127.63

-136.29

-143.00

-143.10

-132.96

-129.58

-137.33

-143.35

-144.79

-144.96

-141.42

-132.10

-121.97

-118.93

-118.23

-119.59

-120.27

-119.04

-117.21

-118.11

-126.86

-138.81

-132.26

-132.99

-125.65

-130.91

-137.03

0.08

0.01

0.02

0.00

0.02

0.00

0.07

0.05

0.01

0.00

0.01

0.00

0.00

0.01

0.00

0.01

0.00

0.01

0.03

0.01

0.00

0.00

0.04

0.03

0.02

0.02

0.01

0.00

0.00

0.00

0.01

0.04

0.00

0.00

0.00

0.00

0.00

0.02

0.03

0.06

0.23

0.06

0.36

0.34

0.50

0.09

0.02

0.00

0.00

0.01

0.01

0.01

0.01

0.55

0.42

0.39

0.29

0.35

0.24

0.23

0.23

0.29

0.30

0.42

0.43

0.54

0.50

0.16

0.14

0.16

0.25

0.36

0.38

0.33

0.32

0.41

0.44

1.71

1.58

1.31

1.09

0.90

1.06

1.37

1.73

1.57

1.39

0.89

1.06

1.42

1.83

2.23

2.65

3.36

3.55

3.85

4.15

5.59

3.98

2.02

1.65

1.70

1.44

1.40

1.21

1.08

-130.01

-125.36

-128.81

-129.35

-129.93

-130.41

-125.52

-126.83

-131.03

-130.60

-123.14

-116.29

-118.72

-119.85

-124.72

-132.81

-133.64

-124.03

-117.42

-116.43

-116.80

-116.70

-115.21

-116.70

-122.53

-126.10

-127.29

-136.15

-143.03

-142.99

-132.55

-128.86

-136.73

-142.92

-144.85

-144.85

-140.96

-131.25

-120.77

-117.36

-116.03

-117.26

-117.68

-116.22

-112.82

-115.27

-125.82

-138.12

-131.54

-132.54

-125.27

-130.71

-136.94

-9.76

-5.42

-9.27

-10.11

-11.15

-11.80

-6.92

-8.22

-12.40

-11.52

-2.92

4.35

2.72

1.29

-6.08

-14 . 04

-14.76

-4.96

1.74

3.14

3.01

3.21

4.74

3.27

-4.74

-8.87

-11.03

-20.94

-28.95

-28.14

-16.25

-11.51

-20.08

-26.97

-31.24

-30.28

-24.91

-13.86

-2.37

1.90

4.08

3.71

4.10

6.50

8.09

5.00

-8.15

-21.34

-14.64

-16.42

-9.18

-15.33

-22.26

12
Table 1. Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98NYE103 36

98NYE104 36

98NYE105 36

98NYE106 36

98NYE107 36

98NYE108 36

98NYE109 36

98NYE110 36

98NYE111 36

98NYE112 36

98NYE113 36

98NYE114 36

98NYE115 36

98NYE116 36

98NYE117 36

98NYE118 36

98NYE119 36

98NYE120 36

98NYE121 36

98NYE122 36

98NYE123 36

98NYE124 36

98NYE125 36

98NYE126 36

98NYE127 36

98NYE128 36

98NYE129 36

98NYE130 36

98NYE131 36

98NYE132 36

98NYE133 36

98NYE134 36

98NYE135 36

98NYE136 36

98NYE137 36

98NYE138 36

98NYE139 36

98NYE140 36

98NYE141 36

98NYE142 36

98NYE143 36

98NYE144 36

98NYE145 36

98NYE146 36

98NYE147 36

98NYE148 36

98NYE149 36

98NYE150 36

98NYE151 36

98NYE152 36

98NYE153 36

98NYE154 36

98NYE155 36

5.200

5.530

4.780

4.420

3.970

3.240

2.930

2.500

12.330

13 . 170

13.190

14.060

14.050

14.940

14.950

14.040

14.060

13.180

13.180

13.150

13.160

13.180

12.310

12.290

12.300

12.300

12.170

11.430

11.420

10.750

11.420

11.260

11.610

11.400

9.670

9.660

9.670

9.160

8.730

7.760

7.880

8.250

8.670

8.570

8.600

7.900

7.070

6.480

6.970

7.440

5.930

5.300

4.810

LONGITUDE 

(DEC MIN)

115

115

115

115

115

115

115

115

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

116

115

54.120

55.180

55.660

56.420

57.260

57.680

57 . 940

58.300

0.790

0.810

1.880

1.910

2.980

2.980

3.990

5.100

7.020

6.170

7.290

5.080

4.010

2.980

1.890

2.950

5.060

6.150

7.260

6.150

5.080

5.720

4.000

2.750

1.780

0.770

0.770

2.680

3.610

4.190

5.460

5.200

3.990

3.280

2.870

1.680

0.590

0.610

1.100

1.850

2.500

3.090

1.160

0.340

59.670

ELEV 

(FT)

2810.8

2750.0

2703.0

2629.0

2589.0

2548.0

2533.0

2516.0

2595.7

2595.0

2576.0

2580.0

2566.3

2565.0

2560.7

2544.8

2749.3

2536.0-

2611.3

2544.7

2549.0

2560.0

2579.0

2556.0

2532.0

2530.0

2690.0

2525.0

2520.7

2529.6

2537.8

2562.0

2579.0

2595.0

2592.0

2535.0

2521.0

2514.2

2483.3

2487.0

2503.7

2529.0

2539.0

2542.0

2570.0

2573.0

2545.8

2531.4

2524.3

2527.0

2528.0

2537.0

2537.3

OBSERVED 

GRAVITY 

(MGAL)

979518.58

979521.51

979525.52

979534.83

979541.40

979540.60

979540.21

979541.86

979553.61

979556.00

979558.46

979561.32

979564.10

979567.54

979569.46

979570.19

979561.91

979573.77

979571.41

979571.09

979565.99

979562.08

979558.68

979564.65

979570.16

979574.49

979566.96

979572.69

979569.87

979568.21

979565.07

979553.62

979551.26

979542.99

979537.51

979552.71

979559.09

979562.97

979568.71

979565.79

979561.52

979561.44

979558.38

979550.73

979541.08

979544.39

979551.27

979553.72

979556.30

979558.75

975551.80

979550.34

979544.14

FAA 

(MGAL)

-42.86

-46 . 12

-45.45

-42 . 59

-39.13

-42.74

-44.10

-43 . 43

-38.29

-37 . 17

-36.53

-34.54

-33.03

-31.00

-29.49

-28.95

-18.03

-24.96

-20.24

-26.78

-31.49

-34.40

-34.76

-30.92

-27 . 69

-23 . 54

-15.84

-24.56

-27.78

-27 . 64

-30.97

-39.91

-41.18

-47 . 64

-50.92

-41.06

-36.01

-32 . 04

-28.59

-29 . 77

-32 . 64

-30.87

-33.60

-40 . 82

-47 . 88

-43.28

-37.77

-35.83

-34 . 62

-32 . 59

-37.28

-36.99

-42.46

SBA TERRAIN CORRECTION CBA 

(MGAL) INNER TOTAL (MGAL) 

(MGAL)

-138.73

-139.91

-137.64

-132.25

-127.43

-129.64

-130.49

-129.24

-126.82

-125.68

-124.38

-122.53

-120.56

-118.48

-116.83

-115.75

-111.80

-111.46

-109.30

-113.57

-118.43

-121.71

-122.72

-118.10

-114.04

-109.83

-107.59

-110.68

-113.75

-113.91

-117.52

-127.29

-129.14

-136.15

-139.32

-127 . 52

-122.00

-117.79

-113.29

-114.59

-118.03

-117.13

-120.19

-127 . 52

-135.53

-131.04

-124.60

-122 . 17

-120.71

-118.78

-123.50

-123.52

-129.00

0.01

0.01

0.01

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.05

0.00

0.05

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.16

0.00

0.00

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.03

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.93

0.87

0.77

0.73

0.66

0.66

0.66

0.67

0.94

1.03

0.87

0.96

0.83

0.95

0.86

0.73

0.83

0.63

0.70

0.63

0.68

0.75

0.78

0.70

0.59

0.57

0.65

0.55

0.58

0.55

0.60

0.65

0.75

0.85

0.71

0.62

0.61

0.60

0.72

0.84

0.67

0.60

0.59

0.64

0.68

0.64

0.60

0.61

0.63

0.62

0.62

0.63

0.64

-138.79

-140.02

-137.83

-132.46

-127.71

-129.90

-130.75

-129.48

-126.82

-125.58

-124.44

-122.50

-120.66

-118.45

-116.89

-115.94

-111.94

-111.74

-109.54

-113.86

-118.67

-121.88

-122.86

-118.32

-114.37

-110.18

-107.90

-111.05

-114.08

-114.28

-117.84

-127.56

-129.32

-136.23

-139.54

-127.82

-122.30

-118.10

-113.47

-114.65

-118.27

-117.44

-120.52

-127.79

-135.78

-131.33

-124.92

-122 . 47

-121.00

-119.07

-123.80

-123.81

-129.27

ISOSTATIC 

ANOMALY 

(MGAL)

-24 . 92

-26.63

-25.44

-20.91

-17 . 12

-20.18

-21.45

-20.76

-12.18

-10.33

-10.04

-7.46

-6.48

-3.63

-2.89

-3.45

-0.93

-0.68

0.68

-2.01

-5.99

-8.37

-9.12

-5.44

-3.09

0.28

1.66

-1.19

-3.46

-4.61

-6.42

-15.30

-16.02

-22 . 32

-27.00

-16.73

-11.88

-8.50

-5.08

-6.78

-9.48

-7.86

-10.32

-16.78

-23.95

-20.06

-14.68

-13.22

-11.84

-9.98

-14.49

-14.38

-19.74

13
Table 1.- Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98NYE156 36

98NYE157 36

98NYE158 36

98NYE159 36

98NYE160 36

98NYE161 36

98NYE162 36

98NYE163 36

98NYE164 36

98NYE165 36

98NYE166 36

98NYE167 36

98NYE168 36

98NYE169 36

98NYE170 36

98NYE171 35

98NYE172 35

98NYE173 35

98NYE174 35

98NYE175 35

98NYE176 35

98NYE177 35

98NYE178 35

98NYE179 35

98NYE180 35

98NYE181 35

98NYE182 35

98NYE183 35

98NYE184 35

98NYE185 36

98NYE186 36

98NYE187 36

98NYE188 36

98NYE189 36

98NYE190 36

98NYE197 36

98NYE198 36

98NYE199 36

98NYE200 36

98NYE201 36

98NYE202 36

98NYE203 36

98NYE204 36

98NYE205 36

98NYE206 36

98NYE207 36

98NYE208 36

98NYE209 36

98NYE210 36

98NYE211 36

98NYE212 36

98NYE213 36

98NYE214 36

4.360

4.430

3.880

1.900

1.900

1.900

2.780

3.650

4.530

5.450

3.580

2.770

1.020

0.120

0.210

59.240

57 . 680

57 . 440

57.440

57.440

57.440

57.450

56.580

56.580

56.570

59.180

59.190

59.180

59.190

0.050

0.580

0.900

0.930

1.540

0.060

6.290

5.870

5.310

5.300

3.730

3.250

2.920

3.500

4.130

4.140

5.180

2.510

1.900

1.720

1.220

0.520

2.100

2.070

LONGITUDE 

(DEC MIN)

115

115

115

115

115

116

116

116

116

116

116

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

59.130

58.450

58.450

58.210

59.310

0.280

0.370

0.380

1.470

2.140

1.400

59.280

59.300

58.400

59.390

59.460

59.750

57.110

56.050

54.980

54.190

52.850

52.850

53.920

54.990

52.850

53.920

54.990

56.050

56.050

57.370

58.200

56.060

57.130

54.980

59.630

59.720

59.360

58.460

55.870

55.490

54.940

54.210

53.350

52.500

52.920

53.070

53.460

54.160

55.040

54.180

57.120

56.160

ELEV 

(FT)

2535.0

2553.0

2540.8

2516.0

2506.8

2507.0

2496.6

2494.0

2499.7

2513.0

2510.0

2501.4

2506.7

2523.0

2523.0

2599.0

2812.0

2637.2

2619.0

2588.9

2604.8

2644.0

2625.3

2621.0

2640.5

2623.0

2600.0

2583.0

2557.0

2559.0

2530.0

2506.3

2562.0

2521.8

2585.0

2604.0

2579.3

2567.0

2591.0

2638.0

2641.0

2671.0

2815.3

2869.0

2906.3

2909.8

2848.0

2746.0

2670.3

2602.0

2621.0

2534.8

2562.3

OBSERVED 

GRAVITY 

(MGAL)

979542.58

979541.10

979541.57

979540.96

979544.78

979549.55

979549.70

979548.49

979552.18

979552.19

979553.88

979544.46

979543.88

979542.73

979547.80

979550.35

979541.27

979543.57

979536.70

979530.31

979524 . 17

979520.26

979524.02

979529.28

979534.74

979526.65

979526.63

979528.60

979532.05

979532.03

979536.31

979539.31

979532.50

979537.08

979529.20

979542.88

979545.62

979544.81

979540.50

979534.92

979534.81

979530.49

979517.79

979514.84

979515.11

979517.04

979518.03

979525.31

979530.25

979532.83

979531.07

979538.72

979536.88

FAA 

(MGAL)

-43 . 59

-43.48

-43.37

-43.47

-40.51

-35.73

-37.81

-40.52

-37.55

-37.61

-33 . 52

-42.59

-40.16

-38.49

-33.55

-22.46

-9.28

-23 . 07

-31.65

-40.87

-45.52

-45.76

-42.51

-37.65

-30.35

-43.82

-46.02

-45.63

-44.64

-45.70

-44.91

-44.60

-46.21

-46.29

-46.10

-39.57

-38.55

-39.71

-41.75

-40.66

-39.80

-40.83

-40.79

-39.59

-35.83

-35.06

-36.06

-37.49

-39.41

-42.54

-41.51

-44.23

-43.44

SBA TERRAIN CORRECTION CBA ISOSTATIC 

(MGAL) INNER TOTAL (MGAL) ANOMALY 

(MGAL) (MGAL)

-130.05

-130.55

-130.02

-129.28

-126.01

-121.23

-122.96

-125.58

-122.81

-123.32

-119.13

-127.90

-125.66

-124.54

-119.60

-111.10

-105.19

-113.02

-120.98

-129.17

-134.36

-135.93

-132.05

-127.05

-120.40

-133.28

-134.69

-133.73

-131.85

-132.98

-131.20

-130.08

-133.59

-132.30

-134.27

-128.38

-126.52

-127.26

-130.12

-130.63

-129.87

-131.92

-136.81

-137.44

-134.95

-134.31

-133.19

-131.15

-130.49

-131.28

-130.90

-130.68

-130.83

0.00

0.00

0.00

0.00

0.00

0.01

0.02

0.02

0.01

0.00

0.00

0.01

0.00

0.00

0.00

0.01

0.03

0.06

0.00

0.00

0.00

0.00

0.01

0.00

0.04

0.02

0.00

0.00

0.01

0.00

0.00

0.01

0.00

0.00

0.00

0.01

0.02

0.01

0.01

0.00

0.00

0.02

0.01

0.00

0.00

0.00

0.01

0.02

0.00

0.00

0.00

0.00

0.00

0.65

0.65

0.65

0.66

0.76

1.01

0.88

0.76

0.79

0.74

0.94

0.72

0.84

0.71

0.94

1.06

1.02

0.75

0.57

0.55

0.53

0.54

0.61

0.61

0.72

0.62

0.56

0.54

0.57

0.58

0.62

0.69

0.62

0.66

0.59

0.67

0.66

0.65

0.66

0.72

0.74

0.75

0.74

0.87

0.94

1.06

0.73

0.70

0.69

0.66

0.64

0.66

0.69

-130.32

-130.83

-130.29

-129.53

-126.16

-121.13

-122.98

-125.72

-122.93

-123.49

-119.10

-128.09

-125.72

-124.74

-119.57

-110.98

-105.16

-113.21

-121.35

-129.55

-134.76

-136.34

-132.38

-127.37

-120.63

-133.60

-135.07

-134.12

-132.20

-133.32

-131.50

-130.29

-133.90

-132.55

-134.61

-128.65

-126.79

-127 . 54

-130.39

-130.85

-130.08

-132.13

-137.06

-137.58

-135.03

-134.26

-133.46

-131.43

-130.75

-131.56

-131.20

-130.93

-131.06

-20.78

-20.76

-20.66

-21.22

-18.61

-14.26

-15.51

-17 . 60

-14.92

-15.24

-11.77

-19.85

-18.83

-17 . 89

-13.33

-5.50

-1.01

-7.40

-14.78

-22.25

-26.96

-27 . 64

-24.28

-19.95

-13 . 94

-23 . 65

-25.80

-25.60

-24 . 40

-24 . 87

-23.58

-22.75

-24 . 83

-23.74

-25.42

-17.93

-16.46

-17.40

-19.61

-19.45

-18.81

-20.72

-24.71

-24.10

-20.96

-19 . 56

-21.11

-19.80

-19.75

-21.58

-21.15

-21.66

-21.17

14
Table 1. Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MiN) 

NAME

98NYE215 36

98NYE216 36

98NYE217 36

98NYE218 36

98NYE219 36

98NYE220 36

98NYE221 36

98NYE222 36

98NYE223 36

98NYE224 36

98NYE225 36

98NYE226 36

98NYE227 36

98NYE228 36

98NYE229 36

98NYE230 36

98NYE231 36

98NYE232 36

98NYE233 36

98NYE234 36

98NYE235 36

98NYE236 36

98NYE237 36

98NYE238 36

98NYE239 36

98NYE240 36

98NYE241 36

98NYE242 36

98NYE243 36

98NYE244 36

98NYE245 36

98NYE246 36

98NYE247 36

98NYE248 36

98NYE249 36

98NYE250 36

98NYE251 36

98NYE252 36

98NYE253 36

98NYE254 36

98NYE255 36

98NYE256 36

98NYE257 36

98NYE258 36

98NYE259 36

98NYE260 36

98NYE261 36

98NYE262 36

98NYE263 36

98NYE264 36

98NYE265 36

98NYE266 36

98NYE267 36

3.980

3.840

2.710

8.780

7.890

6.740

6.120

5.500

4.900

3.540

2.180

1.420

2.010

2.520

3.020

3.700

4.290

4.830

4.670

5.210

5.980

6.720

7.520

2.530

1.700

1.050

0.280

1.690

1.700

1.740

0.980

1.880

2.800

3.650

4.000

4.390

4.610

5.490

6.330

7.970

8.490

14.060

13.190

13.220

14.090

13.280

14.060

14.610

15.180

15.910

16.620

17.360

14.940

LONGITUDE 

(DEC MiN)

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

54.870

56.960

56.470

53.280

52.080

49.920

48.900

47 . 890

46.910

44.680

42.450

41.190

40.600

39.660

38.790

38.460

38.400

38.930

37.480

36.560

36.150

35.900

35.590

38.030

37.730

38.390

38.230

34.910

35.900

37.010

37.450

33.270

33.310

33.530

32.400

31.320

33.870

33.710

34.100

34.220

35.180

58.660

58.650

57 . 540

57.530

56.510

56.420

55.370

54.880

54.420

53.820

53.260

59.710

ELEV 

(FT)

2726.0

2582.7

2569.3

2915.0

3061.0

3319.8

3405.0

3448 . 0

3422.2

3313.6

3499.8

3660.8

3806.0

4007.8

4226.0

4427.4

4595.8

4814.2

4698.0

4931.7

5150.4

5370.6

5692.1

4183.0

4137.0

3992.9

3912.2

4793.3

4369.0

4182.0

4059.8

4810.0

4964.6

5131.0

5433.8

5766.6

5328.0

5066.0

5146.5

5480.0

5967 . 6

2787.8

2767.3

2933.3

3010.0

3144.8

3274.0

3615.0

3806.0

4019.0

4253.5

4528.0

2690.3

OBSERVED 

GRAVITY 

(MGAL)

979524.37

979541.51

979541.41

979534.32

979527.46

979511.89

979505.81

979503.45

979504.74

979507.64

979498.41

979489.07

979482.00

979473.67

979461.84

979451.36

979442.78

979429.55

979436.55

979422.38

979409.43

979396.41

979378.56

979463.41

979464.49

979472.71

979476.36

979422.90

979452.49

979461.63

979469.40

979425.17

979416.60

979407.02

979387.91

979367.98

979397.43

979412.38

979408.58

979390.53

979361.90

979547.27

979547.84

979538.27

979533.78

979526.71

979519.05

979499.91

979488.08

979476.99

975463 . 51

979450.57

979554.85

FAA 

(MGAL)

-43.29

-39.43

-39.17

-22.46

-14.31

-3.90

-1.08

1.49

1.22

-4.14

6.08

12.97

18.70

28.62

36.58

44.06

50.47

56.99

53.30

60.32

66.82

73.44

84.66

34.81

32.76

28.36

25.53

52.88

42.57

34.07

31.44

56.45

61.09

65.93

74.78

85.57

73.48

62.54

65.11

76.05

92.50

-29.05

-29.16

-23 . 16

-21.69

-14.92

-11.56

0.58

5.88

13.77

21.31

33.12

-31.90

SBA TERRAIN CORRECTION CBA 

(MGAL) INNER TOTAL (MGAL) 

(MGAL)

-136.27

-127.51

-126.80

-121.88

-118.71

-117.13

-117.21

-116.11

-115.50

-117.16

-113.28

-111.89

-111.10

-108.08

-107.55

-106.94

-106.28

-107.20

-106.93

-107.88

-108.84

-109.73

-109.47

-107.85

-108.34

-107.82

-107.90

-110.60

-106.44

-108.56

-107.02

-107.60

-108.23

-109.07

-110.54

-111.10

-108.23

-110.24

-110.42

-110.85

-111.03

-124.13

-123.54

-123.21

-124.35

-122.18

-123.22

-122.72

-123.93

-123.30

-123.76

-121.32

-123.66

0.01

0.01

0.01

0.03

0.02

0.01

0.02

0.01

0.02

0.02

0.02

0.01

0.02

0.06

0.08

0.04

0.07

0.59

0.35

0.38

0.38

0.72

0.24

0.02

0.04

0.03

0.03

1.87

0.05

0.02

0.04

0.06

0.14

0.02

0.06

1.48

0.23

0.22

0.86

0.63

0.49

0.02

0.02

0.03

0.05

0.04

0.04

0.08

0.08

0.08

0.10

0.66

0.02

0.77

0.70

0.70

1.96

1.93

1.93

1.93

1.88

1.87

1.96

1.75

1.68

1.92

2.34

2.68

2.97

3.45

4.55

4.10

4.27

4.77

5.24

5.04

2.27

2.07

1.88

1.81

5.36

2.77

2.22

2.00

3.03

3.32

3.03

3.72

6.46

3.61

4.56

5.55

6.00

5.96

1.63

1.46

1.75

1.94

2.06

2.29

2.83

3.13

3.53

4.18

6.02

1.54

-136.47

-127.74

-127.03

-120.94

-117.84

-116.32

-116.42

-115.37

-114.77

-116.31

-112.69

-111.40

-110.40

-106.99

-106.17

-105.30

-104.19

-104.03

-104.20

-105.00

-105.49

-105.93

-105.91

-106.87

-107.55

-107.20

-107.33

-106.62

-104.99

-107.63

-106.28

-105.96

-106.31

-107.46

-108.27

-106.12

-106.06

-107.09

-106.29

-106.31

-106.56

-123.49

-123.06

-122.48

-123.45

-121.20

-122 . 03

-121.06

-122.01

-121.03

-120.87

-116.64

-123.08

ISOSTATIC 

ANOMALY 

(MGAL)

-24.17

-17.03

-16.84

-3.34

-0.19

1.75

1.76

2.87

3.51

1.99

5.36

6.41

8.08

12.13

13.53

14.94

16.50

16.98

16.91

16.56

16.65

16.70

17.23

12.58

11.26

11.00

10.34

12.25

14.00

11.32

11.99

13.03

13.31

12.75

11.93

14.02

14.82

14.55

16.01

17.11

17.17

-5.78

-6.04

-4.57

-4.84

-2.45

-2.60

-0.41

-0.61

1.23

2.29

7.36

-5.56

15
Table 1.- Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98NYE268 36

98NYE269 36

98NYE270 36

98NYE271 36

98NYE272 36

98NYE273 36

98NYE274 36

98NYE275 36

98NYE276 36

98NYE277 36

98NYE278 36

98NYE279 36

98NYE280 36

98NYE281 36

98NYE282 36

98NYE283 36

98NYE284 36

98NYE285 36

98NYE286 36

98NYE287 36

98NYE288 36

98NYE289 36

98NYE290 36

98NYE291 36

98NYE292 36

98NYE293 36

98NYE294 36

98NYE295 36

98NYE296 36

98NYE297 36

98NYE298 36

98NYE299 36

98NYE300 36

98NYE301 36

98NYE302 36

98NYE303 36

98NYE304 36

98NYE305 36

98NYE306 36

98NYE307 36

98NYE308 36

98NYE309 36

98NYE310 36

98NYE311 36

98NYE312 36

98NYE313 36

98NYE314 36

98NYE315 36

98NYE316 36

98NYE317 36

98NYE318 36

98NYE319 36

98NYE320 36

14.950

15.010

15.430

15.820

15.820

16.720

17.610

18.460

18.470

19.350

20.240

20.240

20.230

20.240

20.230

20.230

19.340

19.340

7.380

7.440

7.880

8.440

9.460

10.000

8.630

8.910

9.530

9.940

9.690

9.730

9.960

10.010

15.840

15.830

15.830

15.830

15.820

15.830

16.380

16.710

16.700

16.970

16.670

16.700

16.730

16.710

17.590

17.600

17.580

17.570

18.440

18.480

18.470

LONGITUDE 

(DEC MIN)

115

115

115

115

115

115

115

115

115

115

115

115

115

115

116

116

116

115

115

115

115

115

115

115

115

115

115

115

115

115

115

115

116

116

116

116

116

116

116

116

116

116

116

116

116

115

115

116

116

116

116

116

115

58.690

57.540

57.580

59.740

58.700

58.690

58.660

58.640

57.570

57.600

57.550

56.490

58.650

59.740

0.830

1.910

0.830

59.750

49.230

48.040

45.910

44.660

42.650

41.760

42.470

41.360

40.310

39.190

38.140

37.140

36.300

35.560

0.830

1.930

2.990

4.050

5.100

6.190

7.310

4.070

5.160

5.830

3.000

1.920

0.830

59.690

59.730

0.810

1.890

2.990

1.920

0.700

59.730

ELEV 

(FT)

2844.0

3087.8

3096.0

2700.8

2871.3

2844.0

2830.0

2992.0

3267.8

3486.0

3763.0

4098.0

3471.0

3169.0

2934.0

2780.0

2751.8

2948.0

3446.8

3618.8

3999.0

4324.0

5069.0

5435.5

4875.5

5161.3

5533.2

5899.8

6170.2

6385.4

6795.8

6278.2

2618.0

2583.0

2559.2

2537.6

2574.0

2639.0

2768.8

2562.6

2587.8

2746.2

2583.8

2595.0

2626.0

2687.0

2700.0

2633.4

2616.0

2597.6

2630.4

2657.0

2780.6

OBSERVED 

GRAVITY 

(MGAL)

979544.53

979530.33

979529.77

979556.39

979544.84

979548.47

979548.56

979543.10

979524.83

979511.88

979496.76

979477.69

979515.47

979535.41

979551.32

979561.55

979562.18

979548.39

979506.31

979495.96

979477 . 68

979459.49

979415.63

979393.52

979425.64

979407.52

979387.41

979365.91

979351.10

979339.12

979312.68

979345.37

979561.71

979566.07

979568.57

979570.26

979573.11

979574.57

979567.56

979573.06

979576.18

979569.67

979569.58

979566.54

979562.50

979557.99

979559.68

979563.88

979567.46

979570.63

979569.31

979566.01

979557.96

FAA 

(MGAL)

-27. 79

-19.15

-19.54

-30.64

-26.16

-26.39

-28.89

-20.34

-12.70

-6.40

3.25

15.67

-5.48

-13.95

-20.12

-24.37

-25.12

-20.46

1.54

7.28

24.11

35.67

60.38

71.94

53.39

61.73

75.69

88.06

99.02

107.21

119.01

102 . 98

-33.13

-32.05

-31.79

-32.13

-25.84

-18.29

-13 . 88

-28.24

-22.74

-14.74

-29.67

-31.70

-32 . 87

-31.62

-29.97

-32.05

-30.07

-28.62

-28.11

-28.96

-25.38

SBA TERRAIN CORRECTION CBA ISOSTATIC 

(MGAL) INNER TOTAL (MGAL) ANOMALY 

(MGAL) (MGAL)

-124.78

-124.46

-125.13

-122.75

-124.09

-123.39

-125.42

-122.39

-124.15

-125.29

-125.10

-124.10

-123.87

-122.03

-120.19

-119.19

-118.97

-121.00

-116.02

-116.15

-112.28

-111.80

-112.51

-113.44

-112.89

-114.30

-113.03

-113.16

-111.42

-110.57

-112.77

-111.14

-122.42

-120.15

-119.07

-118.68

-113.63

-108.29

-108.31

-115.65

-111.00

-108.41

-117.80

-120.21

-122.43

-123.26

-122.06

-121.86

-119.30

-117.21

-117.82

-119.58

-120.21

0.03

0.04

0.07

0.02

0.03

0.03

0.11

0.05

0.08

0.10

0.12

0.13

0.09

0.07

0.05

0.01

0.03

0.05

0.02

0.02

0.06

0.07

0.15

0.17

0.47

0.66

0.92

1.54

0.50

0.36

0.67

0.58

0.00

0.00

0.01

0.06

0.00

0.03

0.06

0.01

0.01

0.27

0.00

0.00

0.00

0.01

0.01

0.00

0.00

0.00

0.00

0.01

0.03

1.77

2.12

2.24

1.69

1.95

2.26

2.80

2.93

3.36

3.61

3.92

4.84

3.26

2.84

2.51

2.41

2.48

2.73

2.40

2.76

4.13

4.97

6.37

7.25

6.24

7.48

8.56

10.18

7.87

7.19

7.04

6.75

1.43

1.24

1.15

1.19

1.10

1.10

1.04

1.41

1.57

1.63

1.30

1.41

1.61

1.97

2.23

1.87

1.61

1.60

1.88

2.27

2.54

-124.02

-123.40

-123.96

-122.02

-123.15

-122.13

-123.61

-120.50

-121.89

-122.83

-122.39

-120.53

-121.75

-120.28

-118.70

-117.76

-117.46

-119.30

-114.76

-114.57

-109.41

-108.14

-107.55

-107.64

-108.04

-108.24

-105.92

-104.46

-105.05

-104.89

-107.25

-105.90

-121.94

-119.84

-118.85

-118.41

-113.46

-108.13

-108.25

-115.15

-110.36

-107.75

-117.43

-119.73

-121.76

-122.25

-120.79

-120.93

-118.62

-116.55

-116.88

-118.26

-118.65

-5.66

-4.11

-4.38

-3.87

-4.18

-2.48

-3.28

0.35

-0.21

-0.70

0.26

2.90

0.09

0.71

1.43

1.48

2.13

1.17

4.30

5.28

11.95

14.26

16.31

16.79

15.23

15.53

18.46

20.30

19.52

19.67

17.31

18.87

-4.70

-3.55

-3.41

-3.87

0.24

4.73

4.07

0.01

3.90

6.13

-1.41

-2.79

-3.87

-3.42

-1.39

-2.43

-1.04

0.09

1.23

0.93

1.33

16
Table 1. Principal facts of gravity stations, continued

GRAVITY LATITUDE 

STATION (DEC MIN) 

NAME

98NYE321 36

98NYE322 36

98NYE323 36

98NYE324 36

98NYE325 36

98NYE326 36

98NYE327 36

98NYE328 36

98NYE329 36

98NYE330 36

98NYE331 36

98NYE332 36

98NYE333 36

98NYE334 35

98NYE335 35

98NYE336 35

98NYE337 35

98NYE338 35

98NYE339 35

98NYE340 35

98NYE360 36

98NYE360 36

98NYE361 36

98NYE361 36

98NYE362 36

98NYE362 36

98NYE363 36

98NYE363 36

98NYE364 36

98NYE365 36

98NYE366 36

98NYE367 36

98NYE368 36

98NYE369 36

98NYE370 36

98NYE371 36

98NYE372 36

98NYE373 36

98NYE374 36

98NYE37.5 36

98NYE376 36

98NYE377 36

98NYE378 36

98NYE379 36

98NYE380 36

98NYE381 36

98NYE382 36

98NYE383 36

98NYE384 36

98NYE385 36

98NYE386 36

98NYE387 36

98NYE388 36

9.410

9.660

9.770

9.920

10.180

10.370

10.760

11.560

12.110

12.760

13.410

14.080

14.550

57.810

57.200

56.580

55.730

55.710

55.710

57.450

42.596

42.600

42.610

42.610

42.620

42 . 625

42.639

42 . 640

44.200

43.840

43.580

43.380

42.920

42.520

42.170

42.040

41.720

41.400

41.140

40.680

40.490

40.340

40.190

39.500

38.810

38.160

39.980

39.650

39.580

38.880

38.740

41.540

41.760

LONGITUDE 

(DEC MIN)

115 53

115 52

115 51

115 50

115 49

115 48

115 47

115 46

115 46

115 45

115 45

115 44

115 43

115 50

115 49

115 49

115 49

115 50

115 51

115 51

116 35

116 35

116 35

116 35

116 35

116 35

116 35

116 35

116 38

116 37

116 37

116 37

116 36

116 35

116 35

116 34

116 34

116 33

116 33

116 32

116 31

116 31

116 30

116 30

116 30

116 30

116 29

116 28

116 27

116 25

116 24

116 33

116 33

.200

.030

.040

.120

.470

.490

.600

.890

.250

.450

.010

.340

.850

.700

.920

.630

.640

.700

.550

.770

.158

.160

.148

.150

.140

.138

.128

.130

.320

.880

.500

.160

.390

.700

.120

.890

.330

.660

.130

.190

.590

.000

.360

.360

.360

.360

.510

.150

.900

.010

.430

.360

.890

ELEV 

(FT)

2956.3

3295.8

3574.8

3832.8

4094.0

4400.0

4732.2

5214.4

5596.0

6030.0

6221 . 6

6605.3

6885.0

2718.8

2732.8

2751.3

2831.0

2680.0

2667.0

2672 . 0

2644.2

2644.2

2652.1

2652.1

2657.2

2657.2

2663.7

2663.7

2667.0

2658.0

2635.0

2621.0

2589.0

2574.0

2580.0

2587.0

2585.0

2601.0

2590.0

2568.0

2549.0

2543.0

2562.0

2543.0

2523.0

2503.0

2592.0

2625.0

2626.0

2664.0

2661.0

2610.0

2610.0

OBSERVED 

GRAVITY 

(MGAL)

979533.66

979517.01

979500.24

979485.70

979469.82

979451.15

979434.07

979409.03

979386.63

979359.28

979347.81

979321.58

979301.64

979521.66

979519.58

979516.98

979513.18

979523.60

979525.63

979519.17

979591.11

979591.11

979590.45

979590.45

979589.82

979589.82

979589.36

979589.36

979603.84

979603.11

979606.05

979606.76

979606.75

979601.00

979597.12

979595.28

979594.58

979592.64

979591.96

979592.82

979592.72

979593.96

979597.48

979593.01

979593.87

979597.85

979595.24

979594.74

979593.99

979584.07

979582.14

979589.06

979590.96

FAA 

(MGAL)

-20.14

-5.23

4.08

13.58

21.88

31.70

45.29

64.43

77.11

89.62

95.22

104.09

109.76

-37 . 84

-37.73

-37.70

-32.79

-36.54

-35.73

-44.21

-39.82

-39.82

-39.75

-39.75

-39.92

-39.92

-39.80

-39.80

-27.26

-28.32

-27.16

-27.48

-29.83

-36.42

-39.23

-40.22

-40 . 65

-40.62

-41.96

-42.51

-44.12

-43.23

-37.70

-42 . 96

-42 . 99

-39.95

-36.82

-33.74

-34.29

-39.63

-41 . 64

-43 . 56

-41 . 97

SBA TERRAIN CORRECTION CBA 

(MGAL) INNER TOTAL (MGAL) 

(MGAL)

-120.97

-117.63

-117.85

-117.14

-117.75

-118.36

-116.10

-113.41

-113.75

-116.04

-116.97

-121.19

-125.06

-130.57

-130.94

-131.54

-129.35

-127.95

-126.69

-135.35

-130.01

-130.01

-130.21

-130.21

-130.55

-130.55

-130.64

-130.64

-118.22

-118.97

-117.03

-116.87

-118.14

-124.21

-127.22

-128.45

-128.81

-129.33

-130.30

-130.09

-131.05

-129.96

-125.08

-129.69

-129.04

-125.32

-125.22

-123.27

-123.86

-130.49

-132.40

-132.57

-130.99

0.04

0.06

0.07

0.16

0.08

0.09

0.10

0.22

0.30

0.44

1.07

1.95

4.46

0.00

0.00

0.02

0.05

0.00

0.00

0.00

0.09

0.09

0.11

0.11

0.12

0.12

0.16

0.16

0.00

0.01

0.01

0.00

0.00

0.01

0.01

0.02

0.02

0.00

0.01

0.03

0.02

0.01

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.01

2.24

2.78

3.16

3.65

3.72

4.10

4.71

5.57

6.42

8.01

11.08

16.52

22.20

0.59

0.59

0.61

0.64

0.65

0.65

0.56

0.56

0.56

0.57

0.57

0.58

0.58

0.62

0.62

0.57

0.51

0.49

0.46

0.42

0.43

0.40

0.40

0.36

0.29

0.33

0.35

0.31

0.26

0.21

0.15

0.11

0.10

0.17

0.13

0.13

0.12

0.13

0.35

0.36

-119.76

-115.96

-115.86

-114.72

-115.30

-115.59

-112.76

-109.27

-108.80

-109.53

-107.39

-106.19

-104.37

-130.95

-131.32

-131.90

-129.70

-128.25

-127.00

-135.74

-130.39

-130.39

-130.58

-130.58

-130.92

-130.92

-130.98

-130.98

-118.61

-119.41

-117.49

-117.36

-118.65

-124.71

-127.75

-128.99

-129.38

-129.98

-130.90

-130.66

-131.66

-130.61

-125.79

-130.46

-129.84

-126.13

-125.98

-124.07

-124.67

-131.32

-133.21

-133.16

-131.57

ISOSTATIC 

ANOMALY 

(MGAL)

-1.56

3.22

4.09

5.92

5.92

6.33

9.94

14.36

15.45

15.48

18.23

20.03

22.27

-20.65

-20.98

-21 . 82

-20.25

-19.40

-18.65

-26.35

-10.12

-10.12

-10.30

-10.30

-10.62

-10.62

-10.65

-10.65

3.01

1.83

3.50

3.42

1.72

-4.65

-7.97

-9.31

-9.95

-10.80

-11.94

-11.96

-13.03

-12 . 03

-7.21

-12.65

-12.78

-9.76

-7.40

-5.46

-6.07

-12.56

-14.44

-13.78

-12.01

17
Table 1. Principal facts of gravity stations, continued

GRAVITY 

STATION 

NAME

98NYE389

98NYE390

98NYE391

98NYE392

98NYE393

98NYE394

98NYE395

98NYE396

LATITUDE 

(DEC MIN)

36 41.930

36 42.100

36 42.290

36 42.500

36 43.100

36 43.580

36 44.090

36 44.670

LONGITUDE 

(DEC MIN)

116

116

116

116

116

116

116

116

33.720

33.570

33.430

33.380

32.960

32.240

31.400

30.740

ELEV 

(FT)

2636.0

2647.0

2664.0

2665.0

2697.0

2772.0

2855.0

2934.0

OBSERVED 

GRAVITY 

(MGAL)

979586.97

979585.15

979582.40

979581.05

979577.73

979571.55

979565.12

979559.30

FAA 

(MGAL)

-43.77

-44.80

-46.22

-47.78

-48.96

-48.78

-48.14

-47 . 37

SBA TERRAIN CORRECTION CBA 

(MGAL) INNER TOTAL (MGAL) 

(MGAL)

-133.67

-135.08

-137.08

-138.67

-140.94

-143.32

-145.52

-147.44

0.02

0.04

0.03

0.05

0.07

0.01

0.02

0.02

0.39

0.44

0.45

0.50

0.51

0.42

0.49

0.52

-134.22

-135.58

-137.59

-139.12

-141.40

-143.88

-146.03

-147.94

ISOSTATIC 

ANOMALY 

(MGAL)

-14.43

-15.56

-17.31

-18.57

-19.98

-21.70

-22.98

-23 . 99

18