z. 

NASA Technical Memorandum 83542 

FAA-EE-83-12 

Tabulations of Ambient Ozone Data 

Obtained by GASP Airliners; 

March 1975 to July 1979 

William H. Jasperson 

Control Data Corporation 

, Minneapolis, Minnesota 

and 

James D. Holdeman 

Lewis Research Center 

Cleveland, Oh io 

January 1984 

NASA 
Page intentionally left blank 
PREFACE 

This report contains part of the data, either obtained by the Global Air 

Sampling Program (GASP) or analyzed from existing ozonesonde measurements since 

the publication of Federal Aviation Administration (FAA) Report Number 

FAA-EQ-78-03, "Guidelines for Flight Planning During Periods of High Ozone 

Occurrence, " i n 1978. 

The FAA has published Advisory Circular 120-38, "Transport Category 

Airplanes Cabin Ozone Concentrations" dated October 10, 1980. (Copies of thi s 

advisory circular may be obtained free of charge from the United States 

Department of Transportation, Publications Section M-443.1, Washington, D.C. 

20590.1 In this advisory circular, examples are presented for acceptable (but 

not the only) means for an air carrier to demonstrate compliance with the 

maximum permissible cabin ozone concentrations established by Section 121.578 

of the Federal Aviation Regulations (FAR). In paragraph 6 and Appendix 2 of 

the advisory circular, it is stated that any ozone data set used to show compliance must have, as a miniurn, a resolution on a monthly basis of 2,000 feet 

in altitude and 5 degrees in latitude. 

The data in this report have not been statistically compared with those 

published in the FAA Report Number FAA-EQ-78-03 to determine whether they are 

comparable. Hence, use of the data tabulated in this report, to show compliance with Section 121.578 of the FAR, is not acceptable. 

Since the data sets have been compiled, however, the FAA would like to 

disseminate them at this time as information to the scientific community and 

other interested groups. 

John E. Wesler 

Director of Environment and Energy 

Federal Aviation Administration 
TABULATIONS OF AMBIENT OZONE DATA OBTAINED BY GASP AIRLINERS: 

MARCH 1975 TO JllLY 1979 

Wi 11 iam H. Jasperson 

Control Data Corporation 

Minneapolis, Minnesota 

and 

James f'l. Holdernan 

National Aeronautics and Space Administration 

Lewis Research Center 

Cleveland, Ohio 

SUMMARY 

Tabulations are given of GASP ambient ozone mean, standard deviation, median, 84th percentile, and 98th percentile values, by month, flight level, and geographical region. These data are tabulated to conform to the temporal and spatial resolution required by FAA Advisory Circular 120-38 (monthly by 2000 ft in 

altitude by 5O in latitude) for climatological data used to show compliance with 

cabin ozone regulations. In addition seasonal x 10' latitude tabulations are included which are directly comparable to and supersede the interim GASP ambient 

ozone tabulations given in appendix B of FAA-EE-80-43. Selected probability variations are highlighted to illustrate the spatial and temporal variability of ambient ozone and to compare results from the coarse and fine grid analyses. 

INTRODUCTION 

From March 1975 to July 1979, the NASA Global Atmospheric Sampling Program 

(GASP) obtained atmospheric trace-const i tuents data in the upper troposphere and 

lower stratosphere using fully automated sampling systems on several Boeing 747 

airplanes in routine commercial rervice (ref. 1). GASP systems were operated on 

a United Airlines 8747, two Pan American World Airways B747's, and a Qantas Airways of Australia €3747. Data from the United airliner were over the contiguous 

United States and between the U.S. West Coast and Hawaii. Global coverage was 

provided by the Pan American and Qantas airliners on routes between U.S.A. and 

Europe, U.S.A. and South America, U.S.A. and Japan, U.S.A. and Australia, Australia and Africa, and Australia and Europe. The complete GASP dataset consists of 

667 385 trace constituent and/or meteorological observations made on 6945 flights 

of these airliners between March 11, 1975, and July 12, 1979. 

In response to government and public concern because of reports attributing 

illness of some people on long duration flights to excessive ozone exposure, measurements of ozone concentration in the cabins of two GASP-equipped B747's were 

made from March 1977 to June 1979. Results from these measurements are reported in references 2 to 7. 

In addition to the simultaneous cabin and ambient ozone measurements, GASP 

acquired over 160 000 ambient ozone observations around the world at airliner 

cruise altitudes from March 1975 to June 1979. These have added considerably to 

the climatoloqical data base over what was previously available from ozonesondes, C and have provided data in geographical regions where none were previously extant. 

Early GASP ambient ozone tabulations and ozonesonde ambient ozone tabulat ions were pub1 ished in 1978 (ref. 8). Considerably expanded, but still interim 
GASP ambient ozone tabulations were published in reference 9. This report includes all available GASP ambient ozone data, tabulated to conform to the temporal and spatial resolution specified in reference 10, for climatological data used 

to show compliance with cabin ozone regulations. In addition, tabulations are * 

included for a coarser temporal and spatial grid; these data are directly comparable to and supercede the interim tables in appendix 6 of reference 9. .. INSTRUMENTATION 

Ozone was measured on all aircraft by commercially available ultraviolet absorption photometers modified and repackaged to operate in the airborne environment (ref. 11). Readings are continuous, updating every 20 seconds, with data 

recorded nominally eight times per hour. The instrument range is from 0.003 to 

20 ppmv (parts per mi 11 ion by volume). Operational procedures, set up to insure 

the integrity of the data, included in-flight instrument health checks, instrument calibration techniques, measurement of ozone loss in the GASP air sample inlet line and pressurization system and periodic instrument maintenance. 

All flight instruments were calibrated before installation in the aircraft 

and periodically thereafter using a secondary transfer standard. This standard 

is a laboratory-type ultraviolet (UV) photometer which was initially calibrated 

using a 1 percent neutral buffered potassium iodide (KI) method. Later in the 

GASP program, the standard was calibrated at the NASA Jet Propulsion Laboratory 

(JPL). This calibration is traceable to the JPL 5-meter UV photometer described 

in reference 12. The KI calibration was found to be 9 percent higher than the 

UV photometer calibration. Thus, all published GASP ozone data are 9 percent 

higher than the JPL calibrations. This is a systematic difference and the tabulated data can be easily corrected if the KI method is determined to be incorrect 

and another method, such as the UV photometer, is adopted as the standard. 

The random error of the GASP ozone measuring system was found to be less 

than 4 percent of reading or 0.003 ppmv, whichever is greater. A complete description of the ozone measurement system is given in reference 11. 

PRESENTATION OF DATA 

Avai labi 1 ity 

A1 1 GASP data are available to the public on magnetic computer tape from 

the National Climatic Center, Federal Bui lding, Ashevi 1 le, North Carol ina 28801. 

The data tabulated here are from GASP tapes VLOOOl to VL0031. These tapes include a1 1 data obtained by GASP-equipped aircraft (March 11, 1975, to July 12, 

1979). Flight routes and dates, instrumentation, data processing procedures, 

data tape specifications, and selected analysis are reported in references 13 

to 24. 

Expl anat ion of Data Tables 

In this report ozone amounts are expressed as a volumetric mixing ratio, 

parts per mi 11 ion by volume (ppmv). Since ozone levels in the 1 iterature may be 

expressed in any of several commonly used units, the inter-relationship among 

these is given in appendix A (p. 103). Note that several of these relations require that temperature and/or pressure be known or assumed and that the conversion of averaged values will be an approximation because of the non-linearity of 

the conversion. 
The GASP data are summarized by month for 2000-ft altitude increments (from 

Fl-290 to FL430) in geographical regions of 5O latitude by 45O longitude in tables 

I to XI1 (pp. 4 to 99). The geographical grid used is shown in figure 1 (p. 100). 

Y This grid was selected so that regions, or combinations of adjacent regions, coincide with major flight routes as nearly as possible (e.g.,ocontiguo~s States = 

27.5" to 47.s0 N, 75' to 120' W; and U.S.A. to Europe = 37.5 to 57.5 N, 15' E 

w to 75O W). For each region the tabulation includes mean, standard deviation, median (50th percentile), 84th percentile, and 98th percentile ozone amounts, in 

addition to the number of observations. For applications in which a coarser spatial and temporal grid is acceptable, seasonal x lo0 latitude tabulations are 

provided in appendix B (p. 104). Note that, because the number of observations 

in the tabulated regions is greater here than in tables I to XII, the statistical 

confidence level is greater in most intervals. 

Selected Graphical Presentations 

It is we1 1 known that ozone levels increase with latitude and altitude, that 

they are maximum in the spring, and that the probability of encountering high 

ozone levels follows the same trends (e.g., refs. 2, 6, and 9). These variations 

are quantified in the tables herein, with selected empirical probability variations highlighted in figures 2 to 5 (pp. 101 and 102). These figures are examples of the types of curves that can readily be plotted from, and that might be 

appropriate in specific analyses of, the tabulated data. 

In figure 2 the variation of the mean ozone mixing ratio with latitude is 

shown for low, medium, and high cruise altitudes in the spring (part (a)), and 

for each spring month at flight level 370 (part (b)). The seasonal variation in 

mean ambient ozone near 45' N is shown in figure 3 for flight levels 370 and 410. 

In figure 4 four-point cumulative frequency distributions (cfd's) for the 

spring have been plotted from the tabulated data for Northern Hemisphere laiitudes at flight level 370 (part (a)) and for flight levels 290 to 430 at 40 to 

50' N latitude (part (b)). These curves show the fraction of observations (on 

the ordinate) in which the ozone level exceeded any given ozone level (on the abscissa). For example, at flight level 370 and 40' to 50O N latitude, the probability of encountering ambient ozone greater than 0.3 ppmv would be about 37 

percent. 

Figure 5 shows the zonal latitude-flight level cross section of the 84th 

percentile ozone values for spring. The constant mixing ratio contours define 

regions where the probability is greater than 16 percent that the ozone will exceed the contour value on any independent observation; that is, the probability 

of encountering ozone above, say 0.2 ppmv, is greater than 16 percent in all regions where the 84th percentile value is greater than 0.2 ppmv. In figure 6, the 

same data used in figure 5 are crossplotted to show the vertical distributions of 

the 84th percentile values at selected latitudes. 

CONCLUDING REMARKS 

t Tabulations are given of GASP ambient ozone mean, standard deviation, median, 84th percentile, and 98th percentile values, by month, flight level, and 

geographical region. These data are tabulated to conform to the temporal and 

spatial 1-esolution specified in FAA-AC-120-38, and supersede those in appendix €3 

of FAA-EQ-78-03 (ref. 8) and appendix B of FAA-EE-80-45 (ref. 9). Selected probability variations are shown herein to highlight the spatial and temporal variability of ambient ozone and to illustrate and compare the results from the coarse 

and fine grid analyses. 
CODE: 

TABLE I. - GASP ArlEIENT OZONE DATA 6Y LATITUDE FOR JANUARY 

(a) Flight level 290 

JANUARY 

FL 290 

MEAN 

5E 60E 105E 150E 165W 120W 75W 30W 15E 

LAT 

I : 

60 

5 5 

5 0 

4 5 

40 

3 5 

30 

2 5 

20 ' 15 

10 

5 

0 

5 

I 

10 

15 I 20 

:: 

35 

~ 4c 

45s 

LONGITUDE 
TABLE I. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR JANUARY 

(b) Flight level 310 

JANUARY 

FL 370 

MEAN L AT 

LONG1 TUDE 
TABLE I. - Continued. GASP A?IZIEbIT OZOFIE DATA BY LATITIJDE FOR JANUARY 

(c) Flight level 330 

JANUARY 

FL 330 

MEAN 

60E 105E 150E 165W 120W 75W 30W 15E 

LONG1 TUDE 
TABLE I. - Conti nued. GASP APIBI EF!T OZONE DATA BY LATITUDE FOR JAFJUARY 

(d) Flight level 350 

JANUARY 

FL 350 

LONG I TUOE 
TABLE I. - Continued. GASP AMBIEPIT OZONE CATA BY LATITUDE FOR JAFIUARY 

(e) flight level 370 

JANUARY 

FL 370 

LONG1 TUDE 
TABLE I. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR JANUARY 

(f) Flight level 390 

JANUARY 

FL 390 

LONG1 TUDE 
TABLE I. - Continued. GASP AYBIEFIT OZOF!E DATA BY LATITUDE FOR JANUARY 

(g) Flight level 410 

JANUARY 

FL 470 

1 

MEAN 

LONG1 TUDE 
TABLE I. - Concluded. GASP ArtBIENT OZONE DATA BY LATITI!DE FOP, JAFSIJARY 

(h) Fl ight 1 eve1 430 

JANUARY 

FL 430 

MEAN LA: 

LONG1 TUDE 
TABLE II. - GASP At'lEIEMT OZONE 3ATA BY LATtJTUDE FOR FEBRUARY 

(a) Flight level 290 

FEBRUARY 

FL 290 

LONG1 TUDE 
TABLE 11. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR FEBRUARY 

(b) Flight level 310 

FEBRUARY 

FL 310 

LONG i TUDE 
TABLE X 1, - Continued. GASP AM3IENT OZOF!E DATA EY LATITUDE FOR FEBRUARY 

(c) Flight 1 eve1 330 

LONGS TUDE 
TABLE 11. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR FEBRUARY 

(d) Fl ight 1 eve1 350 

FEBRUARY 

FL 350 

MEAN I AT 

70N 

6 5 

60 

55 

5 0 

4 5 

40 

35 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

40 

45s 

15E 60E 105E 16% 120W 75W 30W 1 SE 

LONG1 TUDE 
TABLE 11. - Continued. GASP AFIBIENT OZONE DATA BY LATITUDE FOR FEBRUARY 

(e) Flight level 37g 

I 

MEAN -- 

I 

15E 60E 1 OSE 150E 165W 120W 75W 30W 15E 

LONGITUDE 
TABLE I I. - Conti nued. GASP AMBIENT OZOrdE DATA BY LATITUDE FOR FEBRUARY 

(f) Flight level 330 

FEBRUARY 

FL 390 

- MEAN 

.646 ,310 2 ,630 . 184 105 .597 ,024 2 ,630 . 186 109 .646 ,856 ,943 ,618 ,7961.018 ,597 ,612 .619 ,618 ,797 1 .015 

.515 ,025 4 ,452 ,055 17 578 . 185 190 .J26 ,535 ,535 ,465 .514 ,521 ,445 ,784 ,926 I 

.608 ,227 144 ,565 . 172 36 .509 ,096 13 ,472 .082 23 ,500 ,207 216 1 .594 ,829 1.114 .551 ,715 ,866 534 .603 ,624 .458 ,538 ,654 ,460 ,799 1 ,048 

.708 ,270 57 ,497 ,312 40 ,474 .I71 18 ,364 ,213 78 1 ,504 ,280 193 

.784 1 ,004 1 .096 ,385 ,833 1 .24 1 ,526 .614 ,692 $448 ,573 ,727 ,463 ,817 1.102 I ,524 081 78 ,509 ,269 73 ,366 . 185 59 ,368 .I02 17 ,666 .256 16 ,427 ,054 14 ,493 ,224 271 

,549 ,601 ,657 ,427 ,794 1.181 ,351 ,941 .a21 ,339 .474 ,571 .639 .990 1 ,088 ,423 ,488 ,498 ,458 ,693 1 ,054 I 

,499 ,088 79 ,565 ,320 226 . 186 . 1 73 25 ,274 ,188 352 ,896 1 .349 ,037 14 ,409 ,275 741 

,514 ,572 ,592 . SO7 .782 I. 343 ,096 ,343 ,626 ,219 ,473 ,739 .347 ,385 ,424 ,386 . G34 1 ,296 

,367 ,160 35 .I82 . 1 19 135 . 147 . 133 98 ,302 ,259 177 ,236 ,207 443 364 442 .782 . 140 31 6 .465 .090 273 ,476 .217 ,653 758 . 140 ,437 731 3 

.I05 .047 21 .U62 .013 9 . 129 ,103 166 ,052 ,001 2 . 122 ,007 198 

.078 . 168 . 182 .037 .065 ,092 ,091 .218 ,372 .052 ,053 ,053 ,082 ,209 ,367 

.051 ,018 7 ,110 .046 16 ,081 .052 107 ,083 ,051 130 

.059 .065 .070 , ,096 . 167 . 186 1 ,079 ,140 . 1 87 ,076 ,142 ,189 

15E 60E 105E 150E 165W 120W 75W 30W 15E 

LAT 

70N 

6 5 

6 0 

5 5 

5 0 

45 

4 0 

35 

3 0 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

4'2 

45s 

LONG1 TUDE 
TABLE 11. - Continued. GASP AMBIENT OZOFlE DATA BY LATITUDE FOR FEBRUARY 

(g) Flight level 410 

FEBRUARY 

FL 410 

MEAN LAT 

7 ON 

6 5 

6 0 

55 

50 

45 

40 

3 5 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

4C 

45s 

LONGITUDE 
TABLE 11. - Concluded. GASP AMBIENT OZONE DATA BY LATITUDE FOR FEERUARY 

(h) Fl ight level 430 

FEBRUARY 

FL 430 

LAT 

70N 

65 

6 0 

5 5 

50 

3 5 

4 0 

3 5 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

40 

45s 

LONGITUDE 
TABLE 111. - GASP ArIBIENT OZONE DATA BY LATITUDE FOR MARCH 

(a) Flight level 290 

MARCH 

FL 290 

LAT 

7 ON 

65 

66 

5 5 

50 

45 

4 0 

35 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

20 

25 

30 

3 5 

4c 

45s 
TABLE 111. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR MARCH 

(b) Flight level 310 

MARCH 

FL 310 

MEAN L AT 
TABLE 111. - Continued. GASP AMBIEFJT OZOFlE DATA BY LATITUDE FOR MARCH 

(c) Flight level 330 

MARCH 

FL 330 

MEAN LAT 

LONG1 TUDE 
TABLE 111. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR MARCH 

(d) Flight 1 eve1 350 

MARC t-l 

FL 350 CODE: 

MEAN 

70N 

6 5 

60 

55 

5 0 

4 5 

40 

35 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

25 

30 

3 5 

40 

45s 

15E 60E 105E , 150E 165W 120W 

LAT 

7 ON 

6 5 

60 

5 5 

5 0 

45 

40 

35 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

20 

25 

3 0 

3 5 

4c 

45s 

LONG1 TUDE 
TABLE 111. - Conti nued. GASP AMBIENT OZONE DATA BY LATITUDE FOR MARCH 

(e) Fllght level 370 

MARCH 

FL 370 

I MEAN LAT 

LONG1 TUDE 
CODE: 

TABLE 111. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR MARCH 

(f) Flight level 390 

MARCH 

FL 390 

LONG1 TUDE 
CODE: 

TABLE 111. - Conti nued. GASP AMBIENT OZQ!.!E DATA BY LATITUDE FOR MARCH 

(g) Flight level 413 

MARCH 

FL 410 

LONG1 TUDE 
CODE : 

TABLE 111. - Concl uded. GASP AMBIEFlT OZONE DATA BY LATITUDE FOR MARCH 

(h) Flight level 430 

MARCH 

FL 430 

MEAN I AT 

LONG1 TUDE 
CODE : 

TABLE IV. - GASP AMBIEf!T OZONE DATA BY LATITUDE FOR APRIL 

(a) Flight level 230 

APRIL 

FL 290 

LONGITUDE 
TABLE XV. - C~ntinued. GASP AMBIENT OZONE DATA BY LATITUDE FOR APRIL 

(b) Flight level 310 

APRIL 

FL 310 

LAT 

70N 

6 5 

6 0 

55 

5 0 

4 5 

4 0 

35 

30 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

25 

3 0 

3 5 

4C 

45s 

LONGITUDE 
CODE: 

TABLE IV. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR APRIL 

(c) Flight level 230 

APRIL 

FL 330 

I MEAN L AT 

LONG1 TUDE 
TABLE IV. - Continued. GASP AMBIENT OZOF!E DATA BY LATITUDE FOR APRIL 

(d) Flight level 350 

APRIL 

FL 350 

LONG1 TUDE 
CODE : 

TABLE IV. -Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR APRIL 

(e) Flight level 370 

7-1 ME#? . ST. M'. APRIL 

FL 370 

MEAN L AT -- 

7 ON 

65 

60 

5 5 

5 0 

45 

40 

3 5 .I84 . 169 664 103 ,374 678 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

20 

25 

30 

3 5 

40 

45s 

15E 60E 105E 150E 165W 120W 75W 30W 15E 

LONG1 TUDE 
TABLE IV. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR APRIL 

(f) Flight level 390 

APRIL 

FL 390 

MEAN 

,036 ,003 

15E 60E 105E 150E 16515 120W 75W 30W 15E 

LONG1 TUDE 

LAT 

70N 

6 5 

60 

55 

5 0 

41 

40 

35 

3 0 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

3 0 

3 5 

4c 

45s 
TABLE IV. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR APRIL 

(g) Flight level 410 

APRIL 

FL 410 

I MEAN L AT 

LONG1 TUDE 
TABLE Il;. - Concl uded. GASP A!IOIEF,'T OZONE DATA EY LATITUDE FOR APRIL 

(h) Flight level 430 

APRIL 

FL 430 
CODE : 

TABLE V. - GASP AMBIEPIT OZONE DATA BY LATITUDE FOR FWY 

(a) Flight level 290 

MAY 

FL 290 

LAT 

70N 

65 

60 

5 5 

5 0 

4 5 

4 0 

3 5 

30 

2 5 

20 

15 

10 

5 

0 

5 

10 

15 

20 

2 5 

30 

35 

4C 

45s 

LONG1 TUDE 
TAELE V. - Continued. SASP ilrlBIEFIT OZOPE DATA ZY LATITWE FOR "A'{ 

(b) FligAt level 310 

MAY 

FL 310 

LONG1 TUDE 
TABLE V. - Continued. GASP AIIBIENT OZONE DATA BY LATITUDE FOR MAY 

(c) Flight 1 eve1 330 

MAY 

FL 330 

MEAN LAT 

LONG1 TUDE 
TABLE V, - Conti nued. GASP AMEIENT OZONE DATA BY LATITUDE FOR f1AY 

(d) Fl ight 1 eve1 350 

MAY 

FL 350 

LONG1 TUDE 
TABLE V. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR MAY 

(e) Flight level 370 

MAY 

FL 370 

LONG1 TUDE 
TABLE V. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR YAY 

(f) Flight level 390 

MAY 

FL '390 

MEAN L AT 

LONG1 TUDE 
TABLE V. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR PlAY 

(g) Flight 1 eve1 413 

MAY 

Ft 410 

LONG1 TUDE 
CODE: 

TABLE V. - Concluded. GASP AMBIENT OZONE DATA BY LATITUDE FOR MAY 

(h) Flight level 430 

MAY 

FL 430 

LONG1 TUDE 
CODE: 

TABLE VI . - GASP AMBIEF!T OZONE DATA BY LATITUDE FOR JUNE 

(a) Flight level 290 

JUNE 

FL 290 

MEAN L AT . -.-- J 

7ON 

65 

60 

5 5 .072 .015 12 ,072 .015 12 .077 .085 .090 .077 ,085 .090 

50 .of9 1 .001 1 .I04 .092 19 .098 ,090 21 .068 . 152 ,346 ,068 . 144 ,346 

45 -066 ,021 13 ,050 ,010 6 .080 ,006 5 ,075 ,019 B .068 .050 7 .068 .028 39 .Ode .063 .064 .082 ,085 .086 ,079 ,095 .098 .060 .I09 . 157 ,062 .092 ,121 

40 ,118 ,041 21 ,082 ,037 6 ,075 ,040 6 ,065 .037 5 .068 15 ,035 9 ,091 .052 62 

& ,112 ,153 .207 ,071 . 106 .1 50 ,067 , 106 .I41 ,046 .092 .I29 ,079 .I39 ,243 .07G ,088 ,096 .065 . 135 .222 

35 .I03 ,050 11 .083 .045 16 .063 .020 6 .059 ,019 13 .078 .041 47 .0Y5 . tGO . 178 .072 ,098 ,198 .058 .Oat .097 .056 .074 . 102 ,066 ,106 ,183 

30 ,083 ,016 11 ,079 ,014 10 .OSO .OM 7 ,073 ,019 28 

, ,089 ,097 ,105 ,080 ,092 .096 ,053 .053 .054 ,063 ,095 . 103 

,057 011 7 ,059 ,025 8 .056 ,016 12 .OSU ,018 b 1 ,056 .a19 32 25 ,055 . OGG ,074 ,059 ,089 . 102 .052 .073 ,079 .060 ,065 ,070 ,049 .073 ,097 

2 0 .041 .010 12 .O59 ,026 4 ,042 ,017 17 ,044 ,017 33 ,038 ,045 ,064 .069 .080 .082 .037 .055 ,081 ,038 ,059 ,086 

15 ,024 1 ,024 1 

10 .026 ,001 7 ,026 .001 7 ,026 .027 ,028 ,026 .027 ,028 

5 ,025 ,002 6 ,025 ,002 6 ,026 .027 .027 ,026 ,027 ,027 

0 ,026 1 ,009 1 I .018 .009 2 ,018 ,023 ,026 

5 . 01 9 1 ,019 1 

10 

15 

2 0 

2 5 

30 

3 5 

40 

45s 1 1 I I I I I I I I 

15E 60E 105E 150E 165W 120W 75W 30W l5E 

LONG1 TUDE 
CODE: 

TABLE VI . - Continued. GASP AMBIENT OZOPIE DATA BY LATITUDE FOR JUNE 

(b) Flight level 310 

JUNE 

FL 310 

LONG! TUDE 
TABLE VI . - Continued. GASP AlilEIENT OZONE DATA BY LATITUDE FOR JUNE 

(c) Flight 1 eve1 330 

JUNE 

m: FL 330 

MEAN 1 AT 

LONG1 TUDE 
TABLE VI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR JUNE 

(d) Fl ight 1 eve1 350 

JUNE 

FL 350 

MEAN LA1 

,222 19 .598 ,672 

15E 60E 1 OSE 15OE 

LONG1 TUDE 
TABLE VI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR JUNE 

(e) Flight level 370 

JUNE 

FL 370 

LONGITUDE 
TABLE VI. - Continued. GASP AMBIENT OZONE.DATA BY LATITUDE FOR JUNE 

(f) Flight level 391) 

JUNE 

FL 390 

ME AN LAT 

lOHGI TUDE 
TABLE VI. - Continued. GASP A!!BIErIT OZONE DATA BY LATITUDE FOR JUNE 

(g) Flight level 410 

JUNE 

FL 470 

tONGI TUDE 
TABLE VI. - Concluded. GASP AMBIENT OZONE DATA BY LATITUDE FOR JUNE 

(h) Fl ight level 430 

JUNE 

FL 430 

LAT 

70N 

65 

60 

5 5 

5 0 

45 

40 

3 5 

3 0 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

15 

20 

2 5 

30 

35 

40 

45s 

LONG1 TUDE 
TABLE VII. - GASP AMBIEFL'T OZONE DATA BY LATITUDE FOR JULY 

(a) Flic~ht 1 eve1 299 

JULY 

FL 230 

I ME AN LAT - .--. . - . - - -- 

ION 

1 

65 ,097 1 ,006 ,016 6 ,082 ,015 4 ,080 ,093 . 116 ,079 ,095 . 103 .OBS ,015 11 ,080 .lo0 ,116 

6 0 . 130 ,013 2 ,068 ,004 3 ,092 ,031 5 . 130 138 . 142 .066 ,071 ,073 ,073 . 126 140 

55 095 ,022 4 .OD5 ,022 4 

5 0 

4 5 

40 

35 

30 

cn 

N 25 

2 0 

15 

10 

5 

0 ,014 ,006 9 ,012 ,017 027 

5 

10 

15 

2 0 

25 

30 

3 5 

40 

45s 

15E 60E 105E 15r)E 165W 120W 75W 30W 15E 
TABLE VII. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR JULY 

(b) Flight level 310 

JULY 

FL 310 

MEAN 

LONGITUDE 

LAT 

7 ON 

65 

60 

5 5 

5 0 

4 5 

40 

3 5 

30 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

35 

4C 

45s 
CODE : 

TABLE VI I. - Conti nued. GASP AM01 ENT OZOFlE DATA BY LATITUDE FOR JULY 

(c) Flight 1 eve1 330 

JULY 

FL 330 

ME AN LAT 

LONG1 TUDE 

TABLE VII. - Continued. GASP ANBIENT OZONE DATA BY LATITUDE FOR JULY 

(e) Flight level 370 

JULY 

FL 370 

MEAtI CAT 

LONGITUDE 
TABLE VII. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR JULY 

(f) Fl lght 1 eve1 390 

,: I MEAN ST. DEV. N 1 JULY 

FL 390 

MEAN tAT 

LONG1 TUDE 
TABLE VII. - Continued. GASP AMBIENT OZONE DATA EY LATITUDE FOR JULY 

(g) Flight level 410 

JULY 

LONG1 TUDE 
TABLE VII. - Concluded. GASP AMBIENT OZONE DATA BY LATITUDE FOR JULY 

(h) Flight level 430 

LONG1 TUDE 
CODE: 

TABLE V I I I . - GASP AFlB I ENT 0 ZOf;'E DATA BY LATITUDE FOR AUGUST 

(a) Flight 1 eve1 290 

AUGUST 

FL 290 

LAT 

70h 

65 

60 

55 

50 

45 

40 

35 

30 

25 

20 

15 

10 

5 

0 

5 

10 

15 

20 

25 

30 

35 

4C 

45s 
TABLE VIII. - Continued. GASP ATjlBIENT OZOPIE DATA BY LATITUDE FOR AUGUST 

CODE: 

(b) Flight level 310 

AUGUST 

I MEAN L AT 

LONG1 TUOE 
TABLE VIII. - Continued. GASP AMBIENT OfOf4E DATA BY LATITUDE FOR AUGUST 

(c) Flight level 330 

AUGUST 

FL 330 
TABLE VIII. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR AUGUST 

(d) Flight level 350 

AUGUST 

-: FL 350 

MEAN 

I I 1 1 1 1 I I I1 J 

15E 60E 105E 150E 16SW 120W 75W 30U 15E 

LAT 

7 ON 

6 5 

60 

55 

5 0 

4 5 

40 

3 5 

30 

2 5 

20 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

35 

4C 

45s 

LONG 1 TUDE 
TABLE VIII. - Continued. GASP AMBIENT OZObIE DATA BY LATITUDE FOR AUGUST 

(e) Fl i ght 1 eve1 370 

AUGUST 

Ft 371) 

LONG1 TUDE 
TABLE VIII. - Continued. GASP AMBIERT OZONE DATA BY LATITUDE FOR AUGUST 

(f) Flight level 390 

AUGUST 

FL 390 

ME AN LAT 

LONG1 TUDE 
TABLE VIII. - Continued. GASP AtlBIENT OZONE DATA BY LATITUDE FOR AUGUST 

(g) Flight level 410 

-: MEAN ST. . N 1 AUGUST 

FL 410 

LONG I TUDE 

TABLE IX. - GASP AMBIENT OZONE DATA BY LATITUDE FOR SEPTEMBER 

(a) Flight level 290 

SEPTEMBER 

FL 290 

LONGITUDE 
TABLE IX. - Continued. GASP AMBIENT OZOFIE DATA BY LATITUDE FOR SEPTEMBER 

(b) Flight level 310 

SEPTEMBER 

FL 310 

MEAN L AT 

LONGITUDE 
TABLE IX. - Contl nued. GASP AMEIENT OZONE DATA BY LATITUDE FOR SEPTEMBER 

(c) Flight 1 eve1 330 

SEPTEMBER 

m: FL 330 

MEAN LAT 
TABLE IX. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR SEPTEMBER 

(d) Flight level 350 

SEPTEMBER 

FL 350 

LONG I TUDE 

L AT 

7 ON 

65 

60 

So 

45 

40 

35 

30 

z5 

20 

15 

10 

5 

O 

lo 

15 

20 

25 

30 

35 

4c 

45s 

MEAN ----- - 

.286 .008 2 .28S .290 .293 .286 ,017 2 .286 .297 .301 

I 

.205 ,125 15 ,195 .368 .382 .222 .I16 19 .264 ,347 ,302 

I 

, 

' ,151 

.I05 : :% .3% 

,112 ,074 361 .085 . 179 ,317 

:A% :,?z .!% ,080 ,051 306 .062 . 105 ,223 

,073 ,057 .044 .I12 .E47 ,058 

,056 1::; .??; .040 

.041 :::: .A% 

1% $A; .A% .035 .018 42 .030 .052 ,074 

:t% 1%; o%? 

. 169 . 109 8 .I61 ,303 ,311 

.315 .Ole 4 .321 .329 .332 

. 163 .I02 36 ,141 .30S .368 

. 106 .094 36 ,072 , t 63 ,342 

.070 .066 83 .046 .098 .323 

.058 .024 199 .057 .077 .lo9 

.OS8 ,031 13 .045 ,068 .I27 

.lo3 .064 114 .077 .I7 1.3t 0 

,097 ,068 189 ,062 ,171 ,266 

.079 ,042 86 .062 . 101 ,214 

.064 ,031 24 .054 ,099 ,128 

,148 .094 62 ,120 .249 .339 

,124 ,084 82 .08S ,244 .313 

.I28 .096 78 .076 ,239 ..333 

.07S .038 95 .061 .096 .204 

,067 ,057 96 ,047 .089 .267 

. 085 ,064 4 .059 ,138 . 184 

I 

.I52 . 151 17 .059 ,359 .386 

.I08 .067 161 . 085 . 1 58 ,302 

.lo2 .047 100 .094 .I62 ,203 

.058 ,017 19 ,057 .073 .087 

.099 .010 5 .lo0 .lo8 .I11 

.I17 ,045 Id .I01 ,175 ,200 

.087 ,037 43 ,078 ,117 .183 

.064 ,022 9 ,051 ,085 . 100 

,042 ,008 3 , .046 ,049 ,050 

I 

.044 .005 6 .043 ,050 ,061 

,051 ,006 13 

15E 

.034 .014 031 .048 .Okj 

,024 .008 16 ,020 .030 ,039 

,026 .010 11 ,024 ,037 ,039 

,029 .014 21 ,036 ,042 ,051 

.028 ,018 44 .Ol9 ,050 .059 

.022 ,021 .014 ,051 .OEE 

.034 ,029 29 .a22 ,078 .08S 

.039 ,025 22 ,024 ,074 ,083 

.036 .019 97 ,039 ,054 .072 

.032 .019 06 ,030 .050 .074 

.024 ,011 25 .02S ,035 ,042 

.027 ,005 6 .027 .031 ,032 . 

1 

,054 ,001 3 ,054 .055 ,055 

,060 ,006 7 ,062 .063 ,071 

,046 .007 12 ' 

.046 .OS5 ,058 

.045 ,007 8 .046 .053 ,054 

I ,069 ,038 56 .068 . 107 .I27 

,043 .O1 1 20 .I57 ,059 13 .047 ,049 .065 .I59 .219 .229 

1 ,050 .012 15 .053 .020 8 1 .050 .06 1 .070 ,045 ,074 .093 

,009 .030 .039 

,003 .003 14 .OOS .007 .009 

.016 ,016 IS ,009 .028 ,049 

.032 .019 10' ,029 .048 ,066 

.050 ,057 .060 

.052 ,002 6 .053 ,055 .055 

. 050 1 

,019 .021 .021 

.041 ,008 11 .042 .048 .056 

.046 .009 12 ,044 .050 .069 

.040 .005 8 .042 .044 .047 

.027 .008 7 ,033 ,033 .033 

,031 .006 5 .028 .034 .041 

.028 .003 6 .028 .031 .033 

.022 1 

,031 .005 4 ,031 ,035 ,038 

,035 .014 6 .029 ,037 ,061 

.081 .005 7 .083 .08S ,086 

.072 ,044 12 .061 .I33 ,147 

.098 .026 15 .092 ,112 .I59 

.I89 

,022 0.000 2 .022 ,022 .022 

,022 .001 6 .022 .023 .025 

.046 .O27 12 .026 ,080 .083 

30W 1 SE 

.076 .045 11 .063 .I35 .I47 

.098 .026 15 .092 ,112 ,159 

.I89 1 

.047 1 .060 .091 18 .060 ,070 .082 

,079 1 

.060 .024 2 .060 .07S .082 

,020 .002 5 .021 .022 ,022 

,014 ,001 4 ,014 ,015 .015 

,014 ,002 5 

,034 1 

, .013 .015 ,017 

,015 .OOO 4 .015 .016 ,016 

.Ole .002 3 - . 01 9 ,020 ,020 

,019 ,001 7 

60E 105E 150E 165W 120W 75W 

.034 ,005 6 .037 .037 ,039 

.022 .015 8 .025 .038 ,038 

.015 ,012 18 
TABLE IX. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR SEPTEMBER 

(e) Flight level 370 

SEPTEMBER 

FL 370 

MEAN 

LONG1 TUDE 

LAT 

' 70N 

6 5 

6 0 

5 5 

5 0 

4 5 

4 0 

3 5 

3 0 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

' 15 

2 0 

2 5 

30 

35 

4c 

45s 
"Page missing from available version"
TABLE IX. - Continued. GASP AYBIENT OZONE DATA BY LATITUDE FOR SEPTEMBER 

(g) Flight level 410 

SEPTEMBER 

FL 410 

LAT / ION 

65 

60 

55 

50 

4 5 

40 

35 

3 0 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

4C 

455 

- -.-- 

MEAN 

70N 

65 

60 

55 

50 

45 

35 

30 

V z5 

P. 

- 

$ -236 058 ,265 8 

. 124 ,033 12 ,115 ,130 ,209 

, : E? :::: ,OA 

:% :% ,067 

062 ,007 7 ,060 ,067 ,075 

,053 ,024 43 .047 ,078 OYB 

,026 ,014 31 ,022 ,046 ,052 

,023 ,008 35 ,023 ,030 ,037 

,250 ,024 S ,241 ,278 .282 

,335 ,071 38 333 411 ,454 

113 .036 IS ,106 ,146 .I77 

,135 ,095 81 , 121 . 191 ,414 

,366 ,043 27 ,359 ,414 ,440 

,278 .I12 97 .2a6 ,390 470 

,261 ,128 I33 .24 1 ,403 ,516 

5 

0 

5 

10 

15 

20 

2 5 

30 

35 

40 

45s 

15E 60E 105E 150E 165W 12061 75W 30U 15E 

LONG1 TUDE 

20 

15 

10 

,294 1 

,249 ,065 30 ,231 ,318 ,377 

.271 ,099 63 ,279 ,355 ,430 

,228 . 109 104 ,205 ,352 ,429 

,090 ,005 2 090 ,093 ,095 

,032 -024 30 ,047 .082 .I00 

.027 015 25 .022 -048 .052 

,022 ,006 25 ,023 ,028 ,035 

,075 ,003 8 ,076 ,076 ,079 

,020 ,012 5 ,017 ,032 ,038 

,171 ,104 70 ,127 ,274 ,411 

-132 ,083 55 ,096 ,210 ,342 

,064 ,024 19 ,056 ,075 . 128 

,028 ,002 5 ,024 ,027 ,030 

,023 ,005 6 ,022 ,025 ,031 . 

,029 ,005 S ,026 .034 ,037 

,259 ,156 21 ,242 ,442 ,518 -- - ,292 ,098 56 206 ,415 ,459 

,221 ,104 89 . 180 357 41 8 

227 . 11 0 16 .225 .33G -426 

. 11 3 ,085 70 . 102 174 -274 

,079 ,027 38 ,086 102 , 1 14 

. 102 -006 7 .I03 .I06 .I08 

,040 ,030 45 ,029 ,069 ,107 

. 163 ,090 37 ,119 ,250 ,375 

. 183 ,090 5 -134 ,290 ,301 

,159 ,088 13 ,134 ,277 ,319 

,288 ,098 65 ,304 ,380 -437 

,247 ,113 39 .232 .378 ,453 

, 180 . 1 15 167 ' ,150 ,297 ,456 

. 107 ,099 90 ,076 ,238 ,327 

,086 ,011 3 ,080 095 . 101 

,038 ,011 4 ,040 ,046 ,047 

,254 ,026 10 ,254 ,281 292 

,211 ,106 129 ,298 ,401 488 

,273 . 108 296 .270 ,382 459 

,221 . 120 446 . 139 .365 075 

. 165 ,037 4 ,183 ,196 ,218 ,169 . a87 139 .Is? .264 .A77 

7 06 100 ,134 ,259 .44 1 

,093 ,043 17 ,088 . 124 . 169 

.070 ,009 8 ,069 ,080 ,083 

.063 ,017 IS ,064 ,071 ,100 

,176 102 441 ,156 282 ,427 

. 134 ,092 332 ,065 ,223 .412 

,077 ,031 83 ,077 . 102 . 14.4 

,079 ,018 20 ,077 ,103 107 

,048 ,028 73 ,033 ,072 108 
TABLE IX, - Concluded. GASP AMBIENT OZONE DATA BY LATITUDE FOR SEPTEMBER 

(h) Flight level 430 

SEPTEMBER T-J - FL 430 

MEAN 

70N 

65 

60 

55 

50 

45 

40 

35 

30 

Z5 vl 20 

15 

10 

5 

0 

5 

10 

15 

20 

2 5 

30 

35 

40 

45s 

15E 6OE 105E 15DE 16% 120U 75W 30W 15E 

LAT 

LONGITUDE 
TABLE X. - GASP AMBIENT OZONE DATA BY LATITUDE FOR OCTOBER 

(a) Fllght level 290 

OCTOBER 

FL 290 

LAT 
TABLE X. - Continued. GASP AMBIENT OZOFJE DATA BY LATITUDE FOR OCTOBER 

(b) Flight level 310 

OCTOBER 

FL 310 

MEAN LAT 

?ON 

65 

60 

55 

50 

45 

40 

35 

30 

25 

20 

15 

10 

5 

0 

5 

) 0 

15 

2 0 

2 5 

30 

3 5 

40 

45s 

15E 60E 105E 150E 165W 1 ZOW 75W 30W 15E 

LONGITUDE 
TABLE X. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR OCTOBER 

(c) Flight level 330 

OCTOBER 

FL 330 

ME AN LAT - -- - .- - . - - -- ,325 1 ,152 ,096 17 ,161 . 102 18 70N .I30 ,261 ,303 ,141 ,283 ,320 -I 

65 ,151 ,129 17 ,137 .I12 26 ,108 .085 19 .I32 .I11 62 ,055 ,333 ,345 . OR7 .303 ,331 .061 .249 .266 ,057 ,293 ,340 

60 ,300 1 . ,146 ,100 23 .287 .027 17 .I60 ,093 27 .I89 ,103 68 ,127 ,296 ,322 ,296 ,312 ,320 ,149 .263 ,308 ,218 ,303 ,322 

55 . 1 13 ,035 10 .238 ,067 6 .092 ,047 17 . 163 .098 46 .I00 ,065 88 . 122 ,080 167 

. 107 .I56 .I68 .280 ,281 .284 .065 , 164 . 183 ,149 .283 ,320 ,072 .I87 .256 .086 ,221 ,293 

50 

45 

40 

35 

30 

25 

2 0 

15 

10 

5 

0 

5 

10 

15 

20 

2 5 

30 

3 5 

40 

45s 

75E 60f 105E 150E 165W 120W 75W 30W 15E 

LONG1 TUDE 
TABLE X. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR OCTOBER 

(d) Flight level 350 

OCTOBER 

FL 350 

MEAN 1 AT 
TABLE X. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR OCTOBER 

(e) Flight level 370 

OCTOBER 

FL 370 

MEAN LAT 

LONG1 TUDE 
TABLE X. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR OCTOBER 

(f) Flight level 390 

OCTOBER 

FL 390 

MEAN 

LONG1 TUDE 
TABLE X. - Continued. GASP AMBIEKT OZONE DATA EY LATITUDE FOR OCTOBER 

(g) Flight level 410 

OCTOBER 

FL 410 

LONGITUDE 
TABLE XI - Concluded. GASP AMBIENT OZONE DATA BY LATITUDE FOR OCTOBER 

(h) Flight level 430 

OCTOBER 

F1. 430 

LAT 

70N 

6 5 

60 

5 5 

5 0 

4 5 

40 

3 5 

30 

25 

20 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

40 

45s 

LONG1 TUDE 
TABLE XI. - GASP AMBIEPIT OZONE DATA BY LATITUDE FOR NOVEMBER 

(a) Flight level 290 

NOVEMBER 

FL 290 

LAT 

70N 

65 

60 

55 

5 0 

45 

40 

3 5 

30 

25 

2 0 

15 

10 

5 

0 

5 

I0 

15 

20 

2 5 

30 

3 5 

4C 

455 
CODE : 

TABLE XI. - Ccnti nued. GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEMBER 

(b) Flight level 310 

NOVEMBER 

FL 310 

I MEAN L AT 

LONG I TUOE 
TABLE XI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEMBER 

(c) Flight level 330 

NOVEMBER 

FL 330 

LONG I TUDE 
TABLE XI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEMBER 

(d) Flight level 350 

NOVEMBER 

FL 350 

ME AN LAT 

LONGITUDE 
TABLE XI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEMBER 

(e) Flight level 370 

NOVEMBER 

Ft 370 

ME AN --. - 

70N I I 1 

65 ,249 .lo8 45 ,249 . 108 45 ,261 ,354 ,426 .261 .354 ,426 

60 . 189 .064 10 .227 .079 51 . 199 ,097 29 ,408 .043 S ,224 .094 95 

1 . 168 ,249 ,318 .228 .305 .4 16 .202 ,309 .370 .418 .439 .460 ,213 ,315 ,429 

5 5 ,235 .088 60 .221 .095 17 .251 ,109 29 .224 . 146 30 .I20 .079 63 ,195 ,115 191 ,246 .336 .358 ,250 .304 ,383 ,265 .353 .483 .I96 .377 .528 ,107 .la9 -292 .I89 .312 ,445 

5 0 . 185 ,085 68 . 194 .084 33 ,324 .094 19 .I34 $109 71 ,067 ,058 94 ,143 .I30 285 

. 179 .277 .339 . 188 .285 ,382 ,307 ,396 .SO5 . 123 .252 ,399 .045 . 1 12 ,179 ,119 ,265 ,403 

.096 .0 17 4 . 120 ,077 62 ,076 ,056 72 . 1 12 ,066 154 . 126 . t 03 79 ,145 ,133 30 .tll .085 437 45 :;k!$ :E 3% .097 .I11 . 11 9 , 110 . 181 .326 .053 . 11 9 .280 ,090 ,191 .273 .a80 .2G3 .351 .098 .252 .444 ,076 ,207 ,327 

,098 ,069 43 ,077 ,051 32 . 100 .067 36 .O63 ,040 33 .070 .064 104 .I25 .070 13 ,086 ,028 14 .082 .063 275 40 ,080 ,135 ,331 .066 . 102 ,209 ,075 . 174 ,258 .04 1 . 1 12 . 154 ,044 . 1 14 .290 . 1 1 1 .I66 .286 .083 . 1 13 .I42 .063 ,131 ,300 

35 . 160 ,031 13 ,043 .033 19 ,070 .033 16 ,046 .Ot 9 93 .131 .089 39 .031 .OD9 20 .070 ,061 202 

,172 ,183 ,198 .043 .063 .124 ,063 .095 ,105 .044 ,063 ,088 .I27 ,209 ,336 .On2 ,040 ,045 .044 .I26 ,223 

,082 ,031 9 ,069 ,019 8 ,023 ,013 6 .046 .021 99 .067 .016 3 ,029 ,013 16 .048 .025 140 30 ,072 . 109 . 138 '064 .094 .I00 ,016 .040 .040 .045 ,067 .080 .060 .080 ,088 ,037 ,042 ,044 ,043 .069 . 104 

,053 ,019 3 .084 .020 19 ,017 .004 7 ,051 .031 95 .027 .009 22 ,050 .031 146 25 ,060 ,068 ,072 .087 ,104 .I17 ,018 .019 ,021 .051 .075 .I22 .030 .033 ,042 ,043 ,076 . 119 

,069 ,029 9 .037 .004 4 ,048 .033 15 .027 ,013 19 .042 ,029 47 20 .057 ,098 .I20 ,037 ,040 .043 .036 .085 ,101 .02? .038 ,048 ,036 ,074 , I06 

,041 ,000 5 ,039 ,008 6 .025 .013 6 .037 .028 14 ,036 ,021 37 15 .04l ,041 .041 .038 .046 .052 ,022 .034 ,049 . .023 .059 ,093 ,037 ,051 ,092 

,017 .002 2 ,026 ,008 12 .042 .oea 14 ,033 ,020 20 10 .017 '018 .Ol9 ,024 ,032 ,043 .O49 .O65 ,075 ,022 ,054 .075 

,002 1 ,029 .004 5 ,031 ,015 10 .049 .030 12 ,037 024 26 5 .027 .034 ,035 .037 .046 ,048 .Od5 ,085 ,088 ,026 ,059 ,007 

0 .043 .085 ,089 .032 ,058 ,007 

5 

10 

15 

2 0 

2 5 

30 

35 

40 

45s 

15E 60E 105E 15OE 165W 120W 75W 30W 15E 

LONGITUDE - 
CODE: 

TABLE XI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEMBER 

(f) Flight 1 eve1 390 

NOVEMBER 

FL 390 

MEAN 

60E 105E 165W 1 20W 75W 30W 15E 

LAT 

70N 

6 5 

60 

55 

5 0 

45 

40 

35 

30 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

35 

4C 

45s 

LONG1 TUDE 
TABLE XI. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEYBER 

(g) Flight level 410 

NOVEMBER 

FL 410 

MEAN LAT 

LONG1 TUDE 
TABLE XI. - Concluded, GASP AMBIENT OZONE DATA BY LATITUDE FOR NOVEMBER 

(h) Flight level 430 

NOVEMBER 

Ft 430 

LAT 

7 ON 

65 

60 

5 5 

50 

4 5 

40 

3 5 

30 

2 5 

2 0 

15 

10 

5 

0 

5 

10 

15 

20 

25 

30 

35 

4c 

45s 

LONG 1 TUDE 
TABLE XII. - GASP AMBIENT OZONE DATA BY LATITUDE FOR DECEMBER 

(a) Fl ight level 290 

DECEMBER 

FL 290 

MEAN LA1 

CODE: 

TABLE XII. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR DECEMBER 

(c) Flight level 330 

DECEMBER 

FL 330 

I MEAN L AT 

LONG1 TUDE 
TABLE XII. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR DECEMBER 

(d) Flight level 350 

DECEMBER 

FL 350 COnE : 

ME AN LAT 

7 ON 

65 

60 

5 5 

50 

4 5 

40 

3 5 

3 0 

cp 25 ul 

20 

15 

10 

5 

0 

5 

10 

15 

20 

2 5 

3 0 

3 5 

40 

455 

15E 60E 105E 150E 165W 120W 75W 30W 15 

LONG1 TUDE 

CODE: 

TABLE XII. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR DECEMBER 

(f) Flight level 390 

DECEMBER 

FL 390 

MEAN 

I I I I 

LAT 

70N 

65 

6 0 

55 

5 0 

4 5 

40 

3 5 

3 0 

2 5 

20 

15 

10 

5 

0 

5 

10 

15 

2 0 

2 5 

30 

3 5 

4c 

45s 

LONG1 TUDE 
TABLE XI I. - Continued. GASP AMBIENT OZONE DATA BY LATITUDE FOR DECEMBER 

(g) Flight level 410 

DECEMBER 

FL 410 

MEAN LAT 

LONG I TUDE 
CODE : 

TABLE XII. - Concluded. GASP AMBIENT OZONE DATA BY LATITllDE FOR DECEMBER 

(h) Flight level 430 

DECEMBER 

FL 430 

LONG1 TUDE 
Figure 1. - Geographical grid for ozone tabulations in tables I to XII. 
tab By flight level. Ibl By month at FL 370. 

.8- 

Figure 2. - Variation of mean ambient ozone with latitude in the spring (M-A-MI. 

Flight Number of 

a level observations 

E m6r FL 410 CI 0--- '\ ------- a Monthly for 42 5' to 47.5' N 

- 

Month Number of 

observations 

----- Mar 4415 

~easona I for 400 to 50° N 

C 

4150 

2836 

I I 

50 30 10 10 30 50s 70 50 30 10 

Latitude, deg Latitude, deg N 

5 " 

ODJFMAMJ JASOND 

Month 

Figure 3. - Seasonal variation of mean ambient ozone near 45' N for 

flight levels 370 and 410. 
Flight Numberof 

level observations 

latitude, Number of 

deg N observations 

463 

1810 

2480 

368Q 

2471 

662 

0 .2 .4 .6 .8 1.0 

Ozone mixing ratio. 03. 

(a) Flight level, 370. 

0 .2 .4 -6 .8 1.0 

PPmv 

tb) to 50° N latitude. 

Figure 4. - Ambient ozone cumulative frequency distributions for spring (M-A-MI. 

Ozone mixing ratio, Number of 

1 PPmv observations 

I\ I/ 984 1 

30 60 90 

Latitude, deg N 

Figure 5. - Northern Hemisphere latitude - flight 

level cross sections of zona I 84th percentile ozone 

mixing ratios in the spring. 

0 .2 .4 .6 .8 1.0 

Ozone mixing ratio, ppmv 

Figure 6. - Vertical profiles of zonal 84th percentile ozone 

mixing ratios for selected latitudes (deg NI. Number of 

observations for each latitude is given in parentheses. 
APPENDIX A 

OZONE UNIT CONVERSION FACTORS 

[Multiply "From" units by this factor to get "To" units. All temperatures are in K and a17 pressures in hectopascals (hPa).] 

. From 

vgld 

10-3 cm STPI km 

Mo 1 ecu 1 es 

~919 (PP~W) 

Partial pressure, 

hPa (mbar) 

Parts per mil 1 ion 

by volume (ppmv) 

Parts per million 

by volume, sea 

level equivalent 

(ppmv StE 1 

To 

pg/m3 

1 

21.4 

7.97~10-11 

~919 

2.87x10-~ TIP 

0.614 TIP 

2.29~10-l3 TIP 

1 

1,661P 

1.66 

5.64 TIP 

10-3 cm SPTlkm 

0.0467 

1 

3.72~10-12 

PP? v 

1.73~10'3 TIP 

0.0370 TIP 

1.38~10-l3 TIP 

0.603 

11 P 

1 

340 TIP 

rno 1 / crn3 

1.26~1010 

2.69~10~1 

1 

ppm v SLE 

5.09~10-4 

0.0109 

4.06~10-14 

0.177 PIT 

0.294lT 

0.294 PIT 

1 

348 PIT 

578lT 

578 PIT 

1.96~103 

hP a 

1.73~10-3 TIP 

0.037 QT 

1.38~10-13 

4.37~1012 PIT 

7.25~1012 PIT 

7.25x1012 PIT 

2.46~1013 

16.3 P/T 

27 .O/T 

27.0 PIT 

91.8 

0.603 P 

1 

P 

3.40T 
APPENDIX 0 

TABULATIONS OF GASP AMBIENT OZONE DATA BY SEASON AND 

LATITUDE FOR 2000-FOOT ALTITUDE INTERVALS 
LONG I TUDE 

W I NTER 

FL 330 

LONGITUDE 
WINTER 

FL 350 

. - h 8 

MLAN 

90N ' w 903 

80 . ,306 ,057 9 

8 0 ,306 ,057 9 

7 0 ,313 .33e .392 ,313 ,338 ,392 70 

,310 ,119 76 .327 .I45 111 ,240 ,082 28 ,310 . 132 215 

60 ,299 ,434 ,555 .3t 0 .479 .650 .237 ,300 ,398 60 

* 50 0 

50 

Co 40 40 

30 3 0 

2 0 2 0 

10 10 

0 0 

10 10 

2 0 2 0 

3 0 30 

4 0 4 0 

,110 .I12 .12 

50 5 0 

60 60 .045 .006 4 ,042 ,049 ,054 .045 ,006 4 

70 . 11 .042 ,049 .054 

I I 7 0 

80 80 

905 90s 

15E 60E 105E 150E 165W 120W 75U 30W 15E 

LONGITUDE 
WINTER 

FL 370 

LONG1 TUOE 
WINTER 

FL 390 

LONG I TUDE 
WINTER 

FL 410 

. .- 

h 8 

rlt AN 

90N 90!< 

80 8 0 

70 7 0 

6 0 60 

50 5 0 

4 0 4 0 

3 0 3 0 

2 0 ? 0 

10 10 

0 0 

10 10 

20 2 0 

3 0 30 

4 0 40 

50 5 0 

60 60 

70 70 

80 80 

90s 90s 

15E 60E 1 O5E 150E 165W l20W 75W 30W 15E 

LONG1 TUDE 
WINTER . 

FL 430 

LONG1 TUDE 
SPRING 

FL 290 

LONG I TUDE 
SPRING 

FL 310 

" - 

90:. 

80 

70 

60 

50 

40 

30 

20 

10 

0 

116 

20 

30 

40 

5 0 

60 

70 

80 

90s 

I 

LONG I TUDE 

,097 ,049 13 ,096 . 139 ,203 

.089 .068 70 . OC2 . 130 ,263 

044 .009 32 ,041 ,049 ,069 

h 

.045 ,011 22 ,045 ,057 ,060 

I 

I 

r 

1 

15E 60E 

I 

,025 .003 7 025 ,028 ,029 

. 

ML AN ---- + 

4 

,263 ,116 4 .307 347 ,368 1 

,170 .248 .284 ,168 ,078 22 

.I35 . 124 220 ,069 ,285 ,436 

.084 ,072 56 ,073 . 127 ,271 

,062 ,026 71 .069 ,024 28 ,053 ,085 ,126 .069 ,094 ,104 

.263 ,116 4 .307 347 ,368 

,167 . ~94 .oso ,249 ,285 21 

,137 .I27 136 .076 .290 ,439 

.19s 1 

,037 ,011 49 ,039 ,046 ,064 

,025 ,010 19 ,024 .036 .043 

,036 ,004 7 ,035 .037 ,045 

,033 .011 1 1 ,027 .047 ,052 

,034 ,001 2 ,034 .034 ,034 

.I43 ,137 33 184 ,141 13 ,093 ,352 .391 . 11 8 ,366 .448 

,040 ,016 ,0$: .040 .055 

.049 .014 5 ,053 ,059 ,062 

,026 ,005 26 ,025 ,031 ,035 

,032 ,007 1 1 ,032 039 ,045 

,034 ,008 65 .033 .042 .055 

,034 .022 71 .029 .039 .098 

,084 ,100 21 .022 .222 ,293 

105E 1 SOE 

.O92 .068 14 .084 .I10 ,263 .I67 ,153 61 ,095 ,313 .543 

. 1 15 ,039 2 . 1 15 . 142 ,152 

,035 ,001 3 ,036 .036 ,036 

,023 ,005 11 ,022 .026 .032 

,025 ,014 11 ,031 .037 .042 

,029 .005 12 ,032 .032 ,036 

,028 ,007 20 .028 ,033 .040 

.039 .026 2 ,039 ,057 .064 

,036 1 

. 106 .090 224 .I10 . 106 440 

- 

,076 .I77 ,445 

,083 ,002 335 1 .062 . I1 r ,375 

,060 .033 299 

I 

,053 091 . 130 

.03J ,016 193 

I 

,033 ,051 ,068 

,021 013 75 ,018 ,031 ,055 

,024 . OD8 70 .022 ,032 ,037 

.027 ,010 64 024 ,036- ,049 

,037 ,011 95 1 

,035 ,047 ,059 

,041 ,033 141 1 

. 163 .079 13 . 162 ,227 ,319 

,046 ,029 25 ,041 ,055 ,123 

, 

,015 ,006 38 ,016 .020 ,028 

.017 .006 25 .017 ,022 ,027 

. 01 9 ,007 20 ,020 ,024 ,034 

.031 .013 4 ,032 ,044 ,046 

,049 ,041 69 030 ,052 . 176 

,032 .002 4 1 

,032 ,034 ,034 

I 

8 

,035 ,058 . 179 

,032 ,002 4 ,032 ,034 ,034 

165W 120W 75W 30W 15E 

I 

I 

I 

,079 .I54 .410 

' ,070 .08 1 127 ,060 ,085 ,354 

.064 ,039 134 .OJQ ,091 .21B 

.036 ,017 52 ,036 ,054 ,072 

,023 1 

.030 ,002 2 .030 ,031 ,032 

,084 .I04 67 ,055 ,095 .456 

,093 .044 6 ,120 .I26 .126 

,024 ,617 34 ,019 ,042 ,062 

,008 1 
SPRING 

FL 330 
SPRING 

FL 350 

LONG I TUDE 
CODE : SPRING 

FL 370 

: hr 

90N 

80 

70 

60 

50 

40 

j0 

20 

10 

0 

10 

2 0 

30 

40 

50 

60 

70 

80 

90s 

'1 

LONG I TUDE 

90:'. 

80 

70 

60 

50 

40 

3 0 

20 

10 

0 

10 

20 

30 

40 

50 

60 

70 

80 

90s 

Mt AN 

5E 6OE 105E 150E 165W 120W 75W 30W 15E 

- .-.-

.74 1 I 

,533 ,174 463 . 1 

,527 .I87 209 ,590 . 126 134 

. ,624 ,686 .a04 

,491 . 185 184 ,549 ,659 ,786 

296 ,213 1078 .226 .54 1 ,754 

,274 . 1 94 1 295 ,211 ,524 ,660 

' ,052 .037 93 052 ,072 ,128 

,044 ,021 186 .043 ,063 .093 

.026 .019 15 ,030 ,046 ,061 

1 

.74 1 1 

,498 . 164 69 ,547 107 35 

,514 ,210 285 ,560 ,710 .854 

,551 ,630 ,718 

.309 . 199 264 .282 ,549 ,740 

,201 . 196 421 . 106 ,425 ,684 

.070 ,027 9 ,060 .092 . 124 

,062 ,028 6 

,056 ,096 ,098 

,049 ,020 56 .O49 .067 ,036 

,019 014 83 .019 ,031 ,051 

025 ,019 132 .023 ,040 ,061 

,033 ,014 112 ,034 .044 ,066 

,036 ,015 21 ,040 ,048 ,061 

.030 ,003 2 

,563 ,694 ,829 a 

.489 ,209 355 ,537 ,677 .835 

I 

1 0 72 

. 

,438 ,237 16 ,540 .664 .683 

,179 . 14 9 252 . 104 ,307 ,619 

,084 ,056 75 ,072 . 1 10 .24 1

,037 ,025 11 2 ,032 ,066 ,082 

.026 .006 16 ,024 ,033 ,036 

,048 .013 26 ,052 ,058 .062 

.048 ,018 25 ,045 062 ,087 

.058 ,033 .054 .085 .12; - 

- 

* 

.416 ,539 .699 

' ,159 . 143 66 .lo7 ,317 ,489 

' . 104 ,026 2 . 104 . 122 ,129 . 

r 

,574 ,678 ,818 

,402 .22: 1810 - 403 ,641 ,799 

,279 ,221 2460 I 

,155 ,541 ,751 

,200 .I76 3660 ,096 ,400 ,654 

,085 ,051 2471 ,079 . 115 ,230 

,043 ,026 662 ,031 ,068 ,104 

,024 ,016 256 ,024 ,035 .070 

026 ,017 287 .a26 ,040 ,063 

,031 ,017 245 1 

029 ,050 .067 

- .043 ,026 86 - 

.030 ,032 ,033 

.570 ,639 ,693 

,327 ,202 722 ,316 .543 .750 

.316 ,221 116 ,329 ,523 . 7 18 

,228 1 

.068 ,022 240 ,066 ,087 ,113 

,039 ,021 101 ,034 ,064 ,077 

,041 ,002 3 ,041 ,043 ,044 

035 ,008 3 ,032 ,042 .045 

,083 ,033 11 ,097 . 1 13 ,129 

,057 ,015 10 .060 ,066 .079 

,036 ,062 113 

,059 ,032 71 

298 .245 363 ,224 .627 ,794 

.223 ,193 244 .I22 ,460 ,698 

,047 .037 97 .048 ,089 . 120 

,058 ,034 78 .047 ,098 . 135 

,012 ,006 46 ,012 ,016 .028 

,023 ,017 71 .020 ,042 ,069 

,026 .019 87 023 ,044 ,070 

.027 .014 29 ,027 ,037 ,060 

,076 ,032 9 ,064 . 120 .I31 ,054 ,085 ,137 

1 ' 

.266 ,223 414 . 175 ,542 .7 16 

. 150 . 144 1 8 1 3 .096 ,246 .627 

,091 ,052 1958 .083 . 1 1 9 .240 

.039 ,029 129 .027 .080 . 106 

,032 ,016 109 .029 ,037 ,093 

,033 .dl l 68 ,031 ,042 .060 

,016 ,010 17 ,021 ,023 ,025 
SPRING 

FL 390 

LONG1 TUDE 
SPRING 

FL 410 
SPRING 

FL 430 

LONG1 TUDE 
SUMMER 

FL 290 

LONG1 TUDE 
CODE: MEW ST. Mr. 

84"L 9m 

SUMMER 

FL 310 

LONG I TUOE 
CODE : SUMMER 

FL 330 
SUMMER 

FL 350 
SUMMER 

FL 370 

LONG1 TUDE 
SUMMER 

FL 390 

LONG1 TUDE 
SUMMER 

FL 410 

, "- 

h I 

- 90Fi 

9180 

60 

50 

40 

30 

'O 

lo 

O 

lo 

20 

30 

40 

50 

60 

70 

80 

90s 

ML AN 

15E 60E 105E 150E ICSW 120U 75W 30W 15E 

LONGITUDE 

90N 

80 

7 0 

60 

50 

40 

3o 

2o 

10 

0 

10 

,317 ,202 47 .201 ,589 ,643 

139 . 167 60 ,082 . 105 ,680 

.072 ,023 10 ,060 . 101 . 107 

- 

,474 .I14 3 .554 ,554 ,554 

,487 ,172 173 ,492 ,678 ,737 

.420 .I42 200 . ,428 ,565 ,636 

,239 ,163 122 . 167 ,445 ,679 

_I2 0 

30 

4 0 

50 

60 

70 

80 

90s 

. 

1 

,022 ,007 30 ,020 ,028 ,039 

,025 r 

,034 .008 

I 

f 26 ,033 ,041 ,052 

.080 .040 93 ,071 ,111 ,187 

229 .I!/ 116 ' ,209 ,356 ,474 1 

- 

I 

1 

,086 ,019 9 ,085 ,094 ,126 

,023 ,010 18 ,022 ,027 .048 

.035 .041 ,052 

.478 ,093 6 ,539 ,543 .545 

,386 ,175 24 1 .406 .535 ,739 

,227 .I50 279 . 194 .393 .589 

. 104 ,126 16 ,059 .096 .445 

.I12 ,070 90 ,097 . 135 ,321 

.I59 .169 136 ,088 ,308 .6 12 

,087 ,074 50 ,089 . 1 19 ,239 

,029 ,020 52 - .023 .035 .086 

089 ,531 ,561 ,571 

461 165 330-'O ,451 ,641 ,729 

.411 158 1110 .376 .571 691 

,244 . 157 1718 , 178 ,421 609 

. 147 . 144 530 ,064 ,253 604 

,070 ,055 239 ' ,060 ,098 . 196 

,032 ,020 125 ' 

,026 ,044 085 

.398 . 147 82 .4 16 ,577 .640 

,424 . 14 1 366 ,435 ,573 ,675 

.247 151 36 ,221 ,443 ,492 

' 

7 

- 

.080 ,040 93 ,071 ,111 ,107 

,229 ,117 116 ,209 ,356 .474 

,021 ,005 6 ,020 ,024 .029 

,292 ,131 12 ,354 .4 15 ,435 

. 104 ,065 10 .085 ,178 ,209 

,229 ,144 429 ' 

,186 ,400 ,555 

,133 ,120 182 . 102 . 172 .520 

,065 ,049 170 ,055 ,086 .I83 

.038 ,020 58 .034 .06\ ,077 

.o2s 1 

,034 .008 26 

.021 .007 23 ,020 .027 .036 

1 

.SO4 .072 6 . 

,520 ,566 ,571 

.507 . 130 57 ,499 .653 ,728 

.42 1 . 164 293 ,446 ,593 ,672 

.273 ,160 71 5 ,242 ,444 .621 

158 .I32 136 ,099 ,282 ,524 

' 

.037 1 
CODE: I MEW S'I'.lXI'. N I SUMMER 

FL 430 

LONGITUDE 
AUTUMN 

FL 290 

LONG1 TUDE 
CODE: !+EN4 '3. DD1. 

9m 

AUTUMN 

FL 310 

LONG1 TUDE 
AUTUMN 

FL 330 

LONG I TUDE 
AUTUMN 

Ft 350 

LONG1 TUDE 
AUTUMN 

FL 370 

LONG1 TUDE 
AUTUMN 

FL 390 

LONG1 TUOE 
0: MEAN ST. Dm'. -1 AUTUMN 

FL 410 

LONG1 TUDE 
AUTUMN 

FL 430 

LONG1 TUDE 
REFERENCES 

1. Perkins, Porter J.; and Gustafsson, Ulf R. C.: An Automated Atmospheric 

Sampling System Operating on 747 Airliners. NASA TM X-71790, 1975. 

2. Perkins, Porter J.; Holdeman, J. D.; and Gauntner, Daniel J.: Aircraft 

Cabin Ozone Measurements on B747-100 and B747-SP Aircraft: Correlations 

with Atmospheric Ozone and Ozone Encounter Statistics. NASA TM-79060, 4 

1978. 

3. Holdeman, James D.: Procedures for Estimating the Frequency of Comercia1 Airline Flights Encountering High Cabin Ozone Levels. NASA TP-1560, 

1979. 

4. Perkins, Porter J.; Holdeman, J. D.; and Nastrom, G. D.: Simultaneous 

Cab in and Ambient Ozone Measurements on Two Boeing 747 Airplanes: 

Volume 1. FAA-EE-79-05, NASA TM-79166, 1979. 

5. Nastrom, Gregory D.; Holdeman, James 0.; and Perkins, Porter J.: Measurements of Cabin and Ambient Ozone on 8747 Airplanes. J. Aircr., vol. 

17, no. 4, Apr. 1980, pp. 246-249. 

6. Hoideman, J. 0. ; and Nastrom, G. D.: Ozone Contamination in Aircraft 

Cabins: Results from GASP Data and Analyses. AIAA Paper 81-0305, 1981. 

(See also NASA TM-81671, 1981 .) 

7. Holdeman, 3. D.; et al.: Simultaneous Cabin and Ambient Ozone Measurements on Two Boeing 747 Airplanes: Volume 11 - January to October 1978. 

NASA TM -81733, 1981. 

8. Belmont, A. D.; et al.: Guidelines for Flight Planning During Periods of 

High Ozone Occurrence. FAA-€9-78-03, Federal Aviation Administration, 

Jan. 1978. (AD-A050988. ) 

9. Nastrom, Gregory D.; and Holdeman, James 0.: Tabulations of Ambient 

Ozone Data Obtained by GASP Airliners; March 1975 to December 1977. 

FAA-EE-80-43, NASA TM-81528, 1980. 

10. Transport Category Airplanes Cabin Ozone Concentrations. FAA-AC-120-38, 

Federal Aviation Administration, 1980. 

11. Tiefermann, Marvin W.: Ozone Measurement System for NASA Global Air 

Sampl ing Program. NASA TP-1451, 1979. 

12. DeMore, W. B.; and Patapoff, M.: Comparison of Ozone Determinations by 

Ultraviolet Photometry and Gas-Phase Titration. Environ. Sci. Technol., 

vol. 10, no. 9, Sep. 1976, pp. 897-899. 4 

13. Holdeman, J. D.; and Lezberg, E. A.: NASA Global Atmospheric Sampling 

Program (GASP) Data Report for Tape VL0001. NASA TM X-71905, 1976. 

t 

14. Holdeman, James 0.; and Lezberg, Erwin A.: NASA Global Atmospheric 

Sampling Program (GASP) Data Report for Tape VL0002. NASA TM X-73484, 

1976. 
15. Hol deman, ~ames D. : NASA Global Atmospheric Sampl ing Program (GASP) Data 

Report for Tape VL0003. NASA TM X-73506, 1976. 

16. Holdeman, J. D.; Humenik, F. M.; and Lezberg, E. A*: NASA Global Atmospheric Sampling Program (GASP) Data Report for Tape VL0004. NASA TM 

X-73574, 1976 . 17. Holdeman, J. D.; and Humenik, F. M.: NASA Global Atmospheric Sampling 

Program (GASP) Data Report for Tape VL0005. NASA TM X-73608, 1977. 

18. Gauntner, Daniel J.; Holdeman, J. 0.; and Humenik, Francis M.: NASA 

Global Atmospheric Sampling Program (GASP) Data Report for Tape VL0006. 

NASA TM-73727, 1977. 

19. Holdernan, J. D.; et al.: NASA Global Atmospheric Sampling Program (GASP) 

Data Report for Tapes VL0007 and VL0008. NASA TM-73784, 1977. 

20. Holdeman, J. D.; et al: NASA Global Atmospheric Sampling Program (GASP) 

Data Report for Tape VL0009. NASA TM-79058, 1978. 

21. Holdeman, J. D.; et a1 .: NASA Global Atmospheric Sampling Program (GASP) 

Data Report for Tapes ULOOlO and VL0012. NASA TM-79061, 1979. 

22. Holdeman, J. D.; Dudzinski, Thomas 3.; and Tiefermann, Marvin W.: NASA 

Global Atmospheric Sampling Program (GASP) Data Report for Tapes VLOOll 

and VL0013, TM-81462, 1980. 

23. Briehl, Daniel; Dudzinski, Thomas J.; and Lin, David C.: NASA Global 

Atmospheric Sampl ing Program (GASP) Data Report for Tape VL0014, NASA 

TM-81579, 1980. 

24. Papathakos, Leonidas C.; and Briehl, Daniel: NASA Global Atmospheric 

Sampl ing Program (GASP) Data Report for Tapes VL0015, VL0016, VL0017, 

VL0018, VL0019, and VL0020. NASA TM-81661, 1981. 
'For sale by the National Technical information Service, Springfield, Virginia 221 61 

3. Recipient's Catalog No. 

5. Aepori Date 

January 1984 

6. Performing Organization Code 

505-44-22 

8. Performing Organization Report No. 

E-1055 

10. Work Unit NO. 

r 

11. Contract or Grant No. 

23. ~ype of Report and Period Covered 

Technical Memorandum 

14. Sponsoring Agency Code 

'.RepO"No. NASA TM-82742 

FAA-EE-83- 12 

2. Government Accession No. 

4. Title and Subtitle 

Tabulations of Ambient Ozone Data Obtained by GASP 

Airliners: March 1975 to July 1979 

7. Author(s) 

William H. Jasperson and James D. Holdeman 

D. Performing Organization Name and Address 

National Aeronautics and Space Administration 

Lewis Research Center 

Cleveland, Ohio 44135 

12. Sponsoring Agency Name and Address 

National Aeronautics and Space Administration 

Washington, D.C. 20546 

15. Supplementary Notes 

Wi 11 iam H. Jasperson, Control Data Corp. , Minneapol is, Minnesota; James D. Hol deman , Lewis Research Center; work partly supported by FAA through interagency agreement 

DOT-FA78WAI-893, 

16. Abstract 

Tabulations are given of GASP ambient ozone mean, standard deviation, median, 

84th percentile, and 98th percentile values, by month, flight level, and 

geographical region. These data are tabulated to conform to the temporal and 

spatial resolution required by FAA Advisory Circular 120-38 (monthly by 2000 ft 

in altitude by 50 in latitude) for climatological data used to show compliance 

with cabin ozone regulations. In addition seasonal x lo0 latitude tabulations are 

included which are directly comparable to and supersede the interim GASP ambient 

ozone tabulations given in appendix B of FAA-EE-80-43 (NASA TM-81528). Selected 

probability variations are high1 ighted to illustrate the spatial and temporal 

variability of ambient ozone and to compare results from the coarse and fine grid 

analyses . 

17. Key Words (Su0~8~trcl by Authcw(8)) 

Ambient ozone 

Aircraft measurements 

GASP 

Cabin ozone 

18. Dlstdbutlon Statement 

Unclassified - unlimited 

STAR Category 47 

19. &curlty CImsit. (of tht8 npott) 

Uncl assi fi ed . 20. SaCurlty Chwlf. (of thla page) 

Uncl assi fi ed 

21. No. of p.gss 22. Price'