DATE OBSERVING JUPITER IN- |BURSTI~ FREQ» | JUPITER To RANGE
PERIOD OBSER- TEN-|NESS. RANGE | LONGITUDE

1968 VATIONS SITY MHZ

2 22 0118 0200

2.22 0200 1333 | 0436 0525 2 | STRONG 14-26 | 15367-18343 81e9- 8868
0811 0824 2 |MODERATE] 12-16 | 28366~29165 [11263-11401

2 23 0207 1253

2 24 0208 1250) 0847 0920 2 |MODERATE] 12-16 | 24608~26607 | 16406-16903
1011 1015 3 | STRONG 12-16 | 297«6-30000 {17645-17760

2 25 0208 1300

2 26 0216 1253] 0918 1105 2 | STRONG 12-34 | 206¢8-27145 |21662-23143
1206 1246 3 | SMOOTH 16-23 | 30804-33206 |24000-24506

2 27 0208 1256 | 0626 0645 3 |MODERATE| 10-18 | 25346-265+0 B5e5- 3862
1204 1245 2 |MODERATE| 16-31 9709-12207 83e3- 8961

2 28 0202 1251) 1126 1236 2 | STRONG 13-18 | 22565-26708 |28165~29104

2 29 0207 1254] 0818 0906 2 |MODERATE| 14-18 | 26266-29166 9866-10563

3 21 0207 1300

3 2 0208 1250 | 0934 1014 3 {STRONG 12-18 | 24968-27460 |15605-16202
1043 1153 1 STRONG 12-16 | 29105-33308 |16663~17602

3.3 0210 1253 | 0723 0807 2 |MODERATE| 12-17 | 32163-34709 |34166-34708

a 4 0207 1250 | 0843 0851 2 |MODERATE| 13-17 | 16063-16541 [19605-19707
1047 #1115 1 |WEAK 20-29 | 23542-25262 |214¢1-218.0
1152) 1222 2 |MODERATE| 15-17 | 27405-29207 |22303-22705

305 0216 1300 | 0656 0813 2 |STRONG 10-18 | 24663-29268 2500- 3509
0844 1040 3 |STRONG 10-16 |31166- 2167 4003- 5607

3.6 0207 1250

307 0207 1300

3.8 0207 1300 | 0422 0437 2 |MODERATE) 17-24 | 24501-25462 [25461-25602

3°09 0207 1250/0511 0605 1 |STRONG 16-18 65e3- 9860 |104e6-11262

3 10 0207 1254

3 11 0207 1250

312 0217 1252 | 0706 0844 3 |STRONG 10-24 | 22667-2860 11e6- 2565

3.13 0119 0210

3.13 0210 1248 | 0245 0307 1 |STRONG 17-30 [21965-23268 [17863-18104
0417 0625 1 |STRONG 16-20 [27502-35205 [19163-20904
0920 1048 1 |STRONG 14-18 9803-15165 |23402-24606

314 0207 1244 | 0717 0730 3 |STRONG 16-18 | 17467-18265 6004- 6242

3.15 0232 1240 | 0349 0550 3  |STRONG 16-28 [19965-27267 [23465-25106
0615 0620 2 |MODERATE} 15-18 | 28708-29008 |25561-25508

3 16 0234 1225 | 0631 0817 2 |STRONG 16-19 88el-15202 |10160-11569

3°17 0233 1222

3°17 2230 2630 | 2334 2447 2 |MODERATE| 28-37 |13701-181+3 B9e2- 9965

3.18 0230 1103

3°19 0233 1223

3 20 0147 0230

3 20 0230 1219/0557 0653 2 iSTRONG 16-21 | 30909-34308 (19005-19864

3 21 0232 1104 |1029 1036 1 |WEAK 16-17 | 26560-26962 7205- 7305

3 22 0232 1130 | 0543 0614 2 |MODERATE| 16-35 |242¢7-26164 [23546-24000

3 23 0232 1206 | 0807 0843 2 |MODERATE| 16-34 |120+3-14261 9905-10406
0846 1007 2 |MODERATE|] 16-21 [14309-19209 |10561-11605

3 24 0234 1202 | 0734 0821 1 |STRONG 14-19 | 25100-27904 |29845~305e61

3 25 0233 1157

3 26 0133 1028

3 27 0148 1030

3 28 0147 1030 | 0522 0553 3  |STRONG 16-20 53e5- 7202 1460- 1864
0809 1008 3  |STRONG 14-22 |15404-22604 BT eb- S4eh

3 29 0147 1030

3 30 0134 1100/0817 1036 3 |STRONG 16-35 |100+4-18404 8508-10504

331 0134 1030 | 0800 0926 3 |STRONG 14-23 |24006-292e6 |28649-29961

4 1 0200 1029

4 2 0135 1031

4 3 0149 1037

4 4 0138 1031

-16-



.05)

3

°
a

PROBABILITY OF EMISSION
ow :
ron?)

-05

USE RIGHT SCALE FOR
DASHED CURVES
|_ —.15
1968 an f )
Mn _ lanai
AN UX 1967
T Vv
\ ]
\y / —.05
\ AY
— Vo
St
Na 0
J5
1965 wy
NN (\
\
—.10
Nv \
A H an aa
/ { v\ / ‘
Al | \/} 1964\ al os
wa iy !
/ \
ma la V
Awl r\ 0
/ \ .30
[7 \
/\ / \

1963
\ —.20
Kee / \
] NY /\962
/ LI 4 10
wo i
Ly
b\ all Vy
SNL pf mea
HY °
eet rN
) 60 120 180 240 300 360

LCM (DEGREES)

Fig. 14

PROBABILITY OF EMISSION

USCONM = ESSA - ASHEVILLE -- 11/5/68 -~



DATE OBSERVING JUPITER IN- |BURSTI~ FREQs |JUPITER Io RANGE
PERIOD OBSER- TEN- |NESS RANGE | LONGITUDE

1967 VATIONS SITY MHZ

4 26 0204 0830

4 27 0204 0829

& 28 0201 0825

4 29 0203 0821) 0257 0334 3 |STRONG 25-34 (11001-13265 9607-10200

& 30 0201 O817

5 1 0200 O8%4

5 2 0200 0810

5 2 2200 2600

5 3 0200 0806

5 4 0203 0802

55 0103 0759

5 6 0203 0732] 0341 0549 3  |STRONG 16-35 | 10901-18605 8604-10405

5 7 0203 0730

5 8 0200 0728

5.9 0200 0730

5 10 0202 0731

5 iL 0200 0730

& 12 0202 O728

5 13 0200 0730] 0525 0617 2 |STRONG 19-32 | 14403-17567 B4eG— 9168

5 14 0203 0728

5.15 0200 O724

5 16 0200 0720

5 17 0203 OT17

5 8 0220 0700

5 19 0221 0632| 0600 0632 1 |SMOOTH 16-20 | 347e4- 608 [22963-23308

5 20 0217 0630

5 22 0218 0629

5 23 0218 0629

5 2% 0228 0630

5 25 0218 0630

5 26 0219 0630

5 28 0216 0630

5 29 0216 0625

5 30 0219 0630

5°32 0218 0628

6 1] 0217 0626

6 2 0327 0623

6 3 0217 0621

6 4 0217 0618

6 5 0217 0615

6 6 0217 0621

6 7 0248 0608

6 86 0247 0605

6 9 0248 0601

6 10 0247 0557

611 0247 0553

6 12 0246 0550

6 13 O247 0546

6 14 0021 0247

6 14 0247 0543

6 15 0248 0540

6 16 0247 0536

6 17 0247 0533

6 18 0247 0530

619 0247 0526

6 20 0247 0523

=10-



09g

ee

082

2961
Ove

ADO),
002

le

(seesbeq) WOT
091 021

08

Ob

or

sv

uolssiwy 40 Apiqoqoig


OBSERVATIONS OF JUPITER'S SPORADIC RADIO EMISSION

IN THE RANGE 7, 6-41 MHz, 6 JULY 1966 THROUGH 8 SEPTEMBER 1968

This report extends the list of Jupiter decametric emissions
through the Jupiter apparition of 1968. (There was no apparition of
1966 because oppositions were on 20 December 1965 and 10 January
1967). The data were recorded on the University of Colorado's
Boulder spectograph (formerly belonging to the High Altitude Observa-
tory) Previous reports (Warwick, J. W. and Kreiss, W. T., IGY
Solar Activity Report Number 28, 2 November 1964; Warwick, J. W.
and Dulk, G. A., IGY Solar Activity Report Number 32, 16 August
1965; and Warwick, J. W. and Dulk, G. A., IGY Solar Activity
Report Number 34, 1 November 1966, published by the IGY World
Data Center A at High Altitude Observatory, Boulder, Colorado 80302)
listed the Jupiter emissions from 1960 through 5 July 1966.

We described the observing equipment and the data format in
the previous reports. The present report uses the same scheme,
The observing periods from 6 July to 6 August 1966, from 11 July
to 10 September 1967, and from 9 August to 8 September 1968 represent
times when the antennas were tracking the sun, Jupiter was within
30° of the sun and therefore in the antenna beam. Observing periods
and emission intervals which spanned ooh UT are shown with negative
times or times greater than 24"; for example, the period from
1 January 2315 UT to 2 January 0103 UT may be designated: 1 January
2315 to 2503 or alternately, 2 January -0045 to 0103.

The overall emission probability for 1967 was 0.071, for 1968
it was , 044; these compare to the average emission probability of
0. 077 for the apparitions of 1961 through 1968. Figure 1 isa
histogram of emission probability vs. longitude of the central meridian
(System III 1957.0, denoted LCM) for the 1967 apparition, Figure 2
is a histogram of emission probability vs. Io's angle from superior
geocentric conjunction (denoted 9. ), These curves closely resemble
the previous years' curves, but the overall emission probability is
lower in 1967 than it was in 1965. Figure 3 shows the joint probability
distribution as a function of the LCM and >, . Note that the emission
probability was greater than 90% near coordinate (LCM? $y, )= (150°, 90°)
and that it was above 40% near (240°, 240°), °

Figure 4 is a plot of the LCM, 9, relation of the emissions
recorded in 1967, Each sloped line represents one Jupiter event and
is the path of the coordinate (LCM, $, ) from beginning to end of the

emission, The line slope is equal to 1B. / Pro where Jupiter's rotational
period Py = .413 days and Io's period Pi,* 1.77 days, The uneven



tie 4

“120

25

P

20
AS
10

NOISSIWS 4O ALITIGVEOud

200 240 280 320 360

160

80

40

1961-68

YEAR

( DEGREES)

To

12

Fig.


DATE OBSERVING JUPITER IN- | BURST I- FREQe | JUPITER To RANGE
PERIOD OBSER- TEN~| NESS RANGE | LONGITUDE

1968 VATIONS SITY MHZ,

4 5 0137 1031] 0619 0814 1 |MODERATE] 15-23 | 21263-28108 | 21003-22606
0855 1010 2 | STRONG 12-21 |306¢6-35200 | 23204-24360

4 6 0134 1030} 1000 1008 2 |WEAK 12-18 | 13664-14143 B5el- 8602

4 7 0134 1032

4 8 0149 1030] 0650 0726 3 | STRONG 14-20 | 32267-34404 | 10563-11003

4 9 0134 1032

4 10 0137 0945

4 11 0205 0950

4 12 0154 0949

4 13 0154 0945

4 14 0155 0945

4 15 0154 0945) 0525 0616 3 | STRONG 16-27 | 24408-27566 T1eT- 8409

4 16 0155 0952

4 17 0200 0945

418 0157 0946

4 19 0152 0954

4 20 0153 0945

4 21 0154 0945

4& 22 0204 0946] 0414 0427 3 |MODERATE} 21-35. |175e3-183e0l1 52e1- 5460
0736 0817 3 | STRONG 16-28 | 29704-32242 B0e6- 8604

4 23 0154 0950

4 24 0154 0710| 0421 0456 2 | STRONG 15-36 [12005-14106 9909-10408
0539 0629 2 | STRONG 12-23 | 16706-19709 | 11009-11860

4 24 0750 0945

4 25 0154 0947

4 26 0154 0945

4 27 0154 0944

4& 28 0154 0940

4 29 0155 0936

4 30 0202 0611] 0243 0304 1 |WEAK 22-34 |24369-25606 | 22668-22908
0500 0603 2 |MODERATE) 16-22 |32668- 408 [24602-25501

4 30 0733 0932

5 1 0154 0928] 0450 0653 3 |STRONG 20-36 |111¢1-186565 8852-10505

5 2 0155 0617

5 2 0703 «0924

5 3 0200 0921

5 & 0153 0917

55 0158 0913

5 6 0157 O910

5 7 0154 0906

5 8 0201 0902

5 9 0205 0859] 0524 0529 2 |MODERATE} 20-24 |25561-25801 | 28063-28101
0617 0622 2 |MODERATE] 18-20 |287+1-29001 | 2878-28865

5 10 0204 0855

5 11 0203 0851

5 12 0203 0848

5 13 0203 0844

5 14 0203 0840

5 15 0203 0836 | 0618 0637 1 |MODERATE) 22-26 |110¢2-121+7 68e4— Tlel

5 16 0204 0833

5 17 0204 0829

5 18 0202 0825

5 19 0202 0822

5 20 0203 0818

5 21 0204 0814) 0514 0527 1 |WEAK 22-26 |253¢8-26167 |199.7-20105

5 22 0204 O811

5 23 0208 0700] 0614 0627 2 |MODERATE| 16-24 |230«8-23807 |254e9-25608

5 23 0740 0807

5 26 0304 0800

5 25 0232 0800

* 5 25 2251 2600

-17-



EMISSION PLOT FOR THE APPARITION OF 1967

TION
SRRANKIUING RN
Mh URNA TE
SB ANANN\ WANE TANNA ANNE
{ al \ wy
FY

=

270 300 330-360

240

90 120 150180 210

60"

LCM (Degrees)

Fig.4


DATE OBSERVING JUPITER IN~ | BURST I- FREGe | JUPITER To RANGE
PERIOD OBSER- TEN-| NESS RANGE | LONGITUDE
1968 VATIONS SITY MHZ

7 23 0215 0431
7 23 1941 2258) 2108 2147 1 |WEAK 22-27 | 22104-24409 | 18367-18902
7 24 0212 0428
7 25 0302 0424
7 26 0218 0421
7 27 0218 0418
7 28 0219 0414
7 28 1602 1900] 1753 1850 2 | WEAK 28-35 | 13540-16904 9205-10005
7 29 0215 0411
7 30 0220 0407
7 30 2040 2400
7 321 0216 0404

1 0229 0400
2 0217 0348
3 0222 0353
4 0235 0350
5 0219 0346
6 0202 0330
7 0201 0332
8 Q000 0330
8 1415 2730
9 1416 2729
10 1424 2726
11 1331 2722
12 1411 2719
13 1411 1500
13 1647 2057
13 2108 2716
14 1457 2145
14 2223 2712
15 1413 1707
1746 2709
16 1414 2705
17 1428 2702
18 1432 2133
19 1624 1650
19 2148 2655
20 1417) 1552
20 1605 2236
20 2323 2652
21 1356 2648
22 1411 1740
22 1753 2645
23 1413 2641
24 1428 2630
25 1440 2635
26 1414 2631
27 1430 2628
28 1417 2624
29 1240 2621| 1338 1516 2 |SMOOTH 25-32 [11006-16969 81le3- 9502
30 1411 2617
31 1418 2614

DOQMHMGHSODOHDGHOHOOMOODOGDOHORMORDODHOBHORHAMMHDHHHOD
i
wu

9 1 1432 2611 q
9 2 1413 2607 "
9 3 1413 2540] 2256 2328 3 {SMOOTH 25-36 |119e7-13900 9605-10100

9 4 1223 2559

9 5 1224 2558

9 6 1217 «2554

9 7 1218 2551

9 8 1235 2548

9 9 1227 2545

% DENOTES SPECIAL OBSERVING PERIOD WHEN lo~RELATED EMISSIONS WERE POSSIBLE.

-19-



Io, LCM PROBABILITY CONTOUR MAP FOR COMBINED
DATA OF 1961-68, CONTOUR INTERVAL .IO

360 tet aL LALA SL Be
L P|] Tp

o oe

240 e

180

oO

120

60

U4 1 4

foe oa ae ee ee aes

Oo 30 60 90 120 150 180 210 240 270 300 330 360

LCM (DEGREES)

Fig. 13



DATE OBSERVING JUPITER IN= |BURSTI- FREQe | JUPITER To RANGE
PERIOD OBSER-— TEN~|) NESS RANGE | LONGITUDE
1967 VATIONS SITY MHZ
11 20 0816 1325] 1144 1234 2 | STRONG 12-21 | 292e7-32209 B98 9609
11 21 0619 1330] 0652 0712 2 |MODERATE| 12-18 | 26608-27809 | 25200-25408
0807 0813 2 |MODERATE| 12-14 | 31261-31567 | 26206-26304
11 22 0626 1331) 0634 0753 2 |SMOOTH 14-18 460e4- Sheol 92 ¢8-10400
11 23 0621 1328
11 24 0623 1140
11 «25 0617 1330
11 26 0619 1330
11 27 0619 1330) 1130 1147 1 | STRONG 13-17 | 25800-26843 TleB— T4He2
11 28 0629 1335) 0911 0942 2 |MODERATE|) 15-18 | 324+5-34302 |25506-260+0
11 29 0619 1330] 0837 0922 2 |MODERATE| 12-17 94e5-12108 9h4e2-10006
11 30 0625 1328] 0850 0951 1 | STRONG 12-23 | 25209-28948 | 29944-30800
1014 1147 2 | STRONG 13-20 | 30307-359e9 [31103-32604
12021 0615 1330; 0851 0900 2 | WEAK 14-16 GAol~ 4966 114300-14403
*12 21 1330 1559
12,2 0618 1330
12 3 0617 1332] 0655 0708 1 [WEAK 14-18 | 27501-28209 [17305-17503
0738 0755 2 |MODERATE| 11-17 | 30101-31164 [17906-18200
0812 0921 3 |MODERATE) 12-20 |321e6- 363 |18464-194e1
12.4 0616 1344] 1001 1005 1 {MODERATE) 14-15 | 1781-18065 43e2- 4
12,5 0634 1330] 0908 1103 3B |MODERATE|] 12-21 |296e6- 601 [23902-25504
12, 6 0524 1339) 0956 1204 3 | STRONG 12-36 | 11642-19306 B9e4-10705
12 7} 0531 1338
12. 8 0516 1330
*12°=«8 1330 1603
12.9 0512 1341
12:10 0754 1338
12: 121 0504 1338
12 12 0504 1340| 0946 1240 2 |STRONG 10~21 | 29367 3869 [22869-25365
12 13 0539 1340] 0631 0703 2 |MODERATE| 13-18 | 32604-34507 4408— 4963
1011 #1248 2 |MODERATE| 12-30 9904-19403 7509~ Wel
12 14 0531 1340) 1038 1120 2 |MODERATE| 12-26 | 26603-29107 |28301-289e1
1210 «1221 2 |WEAK 12-18 | 32169-32806 [29601-29707
12:15 0611 1325
12 16 0517 1340
12:17 0502 1355
12 20 0526 0900
12 20 0925 1337
12 22 0842 1340
12 22 0427 1255 | 0616 0747 1 |MODERATE| 13-24 | 23207-28707 Thel- 8609
12 24 0416 1400
12 27 0424 1349) 0535 0546 1 |WEAK 16-18 | 24160-24707 5e8~ 723
0743 0823 1 |MODERATE] 12-15 | 31864-34206 2349- 2
12 28 0402 1339| 0809 1122 1 |STRONG 12-18 | 12408-24165 |23101-258 64
12 29 0933 1343) 1129 1218 3 |MODERATE| 14-18 BGe3— 6660 |10209-10908
12 30 0403 1340) 0523 0601 2 |MODERATE| 15-21 |325+7-34866 |254¢7-26061
0824 1055 2 |MODERATE| 12-18 1501-16664 |28003-30166
12 31 0440 1340) 0502 0617 3 |MODERATE| 12-37 |10301-149-0 9501-10569
1968
1 3 0402 1351
1 4 0357 1345] 0920 10121 1 |WEAK 12-14 | 34201-17300 [22569-23301
1145 1252 1 |MODERATE| 12-36 |229¢8~270+3 |24604~25508
165 0402 1343
1 6 0326 1340] 0516 0701 2 |STRONG 12-23 | 29509-35904 (23865-25304
17 0322 1340| 0603 0817 2 |MODERATE| 15-38 |115+0-19641 BBoB-10767
1103 1139 1 | STRONG 11-18 | 2964-31862 [13162-13663
1 6 0318 1337) 0737 0752 1 | SMOOTH 15-18 |322¢5-33105 [30566-30707
0904 0931 1 |SMOOTH 14-19 Wel Ble [31709-32107
1 9 0313 1335 | 0342 0351 1 |MODERATE| 16-17 | 33161-33605 [11569-11702
1lo2 1155 1 [WEAK 12-26 | 23761-26901 |17661-18506

-14-



DATE OBSERVING JUPITER IN- | BURSTI- FREQes JUPITER To RANGE
PERIOD OBSER- TEN-| NESS RANGE | LONGITUDE
1966 VATIONS SITY MHZ
11 25 0335 1329 | 0454 0540 1 | MODERATE | 14-25 | 242¢1~26969 | 24602-25207
0657 0850 1 | SMOOTH 14-19 | 31605~ 2468 | 26366-27906
ll 26 0332 1330
Il 27 0328 1330 | 0619 0718 3 | STRONG 13-26 | 23408-27005 | 30502-31305
0943 1620 1 | MODERATE | 15-19 | 358e1- 2005 | 33400-33902
il 28 0324 1329
11 29 0320 1329
11 30 0318 1330
1201 0318 1330/0724 O815 3 | STRONG 14-19 48e6- 5568
0940 0943 1 | MODERATE | 15-18 | 23848-24066 6748 6843
1002 1014 1 | MODERATE | 11-16 | 25261-25904 TW1leO- 7207
1152 «1250 2 | MODERATE | 13-24 | 31866-35347 B6e5- We?
12,2 0318 1329 | 0440 0650 2 | STRONG 15-32 | 20842-28608 | 22900-24703
O710 0715 1 | MODERATE | 13-16 | 29849-30169 | 25002-25009
0734 0748 3 | MODERATE | 13-15 | 31324-32168 | 25 "25505
0822 6920 1 | MODERATE | 12-14 | 34204- 1704 | 26004-26806
203 0317 133010720 0856 3 | STRONG 12-18 9505-15305 9541-10866
0930 1007 2 | STRONG 14-22 | 17401-19605 | 11365-11807
1137 «41252 1 | STRONG 12-19 | 25009-29602 | 13104-14200
12 4 0317 1330 | 0730 0805 2 | STRONG 13-19 | 25202-27364 | 30060-30409
0943 0951 1 | MODERATE | 16-19 | 33206-33705 | 31867-31909
1205 0317 #1330 | 1227 1247 1 | MODERATE | 15-28 | 22204-23405 | 18565-18843
*I2~5 1330 1614
12.6 0251 1354/1044 1055 2 | MODERATE | 12-14 | 310+8-317¢5 14.6- 1601
12, 7 0246 1339 | 0443 0505 1 | MODERATE | 22-25 | 2432-25605 | 16701-17002
12,8 0242 1340 /|0810 0817 1 | MODERATE | 15-16 | 159+0-16363 39e9- 4008
1058 1215 2 |MODERATE | 13-24 | 260«6-307«1 6306— 7405
12 9 0237 %I341 | 0547 0551 1 | WEAK 28-29 | 22362-22546 | 22362-22367
0618 0930 3 | STRONG 11-31 | 24109-35800 | 22706-25407
12 10 0233 2340 | 0752 1050 3 | WEAK 12-38 8904-19761 8454-10906
1205 1239 1 | WEAK 13-19 | 24204-26269 | 12002-12540
tr 11 0228 $340 | 0935 0948 1 | WEAK 12-17 | 302+
1035 1113 1 | MODERATE | 11-17 | 3386
12 12 0224 1340
*12 12 1340 1501
12 13 0219 1339
12 14 0218 1339
12 15 0218 1340
12 16 0218 1340 | 0906 0934 2 | STRONG 19-28 23603-24002
1015 1050 2 | STRONG 16-20 24600-25160
lz 17 0913 1340 | 0940 1128 3 |MODERATE | 11-36 8407-100+0
1203 1229 1 | STRONG 12-18 10409-10866
12:18 0225 1340 |0942 0943 2 | STRONG 12-18 288 66-28867
1044 1245 1 | STRONG 12-17 29704-30600
12:19 O217 ©1340
*12 19 1340 1554
12 20 0218 1341
T2221 0243 1331
12 22 0139 1341 |1139 1226 1 |MODERATE | 12-19 | 23467~263061 3905- 4661
12 23 0134 1326 |0538 0548 2 |MODERATE | 15-16 | 167¢1-17362 | 19260-19304
0705 0850 2 |MODERATE | 11-19 | 219¢7-28362 | 204e3~21902
0946 1105 3 | STRONG 13-22 | 317e1- 408 | 22721-23803
1140) «1232 2 |MODERATE | 13-19 2600~ 5764 | 24302-25006
12 24 0130 1320 | 0310 0618 1 | WEAK 12-18 | 22804-34200 l4e7- 4163
0927 1025 1 | WEAK 17-29 9603-13163 68e0- 7602
1045 1201 3 | STRONG 12-28 | 14304-18904 T900- 8908
12 26 0826 1330

-6-



WAAC
AMINE AA
LAVAS
ANA
AANA AN
a NAN
PNG AN
AMOR
AACN AN AN
AAA WN
AAG ANY
{AVON ANVIL

° °
Ni N nN - 2 7-

BEE

“T80 "210 "240 or "300 330 "360

150

OBSERVATION oes 1968

120

‘90.

°o
Ko}

ie

0 ~ 2

(DEGREES)

LCM

10

Fig.


PROBABILITY OF EMISSION

|
ae
|

|
|

4A

, ce

40 80 120 160 200 240 280. 320 360

Io (DEGREES) YEAR 1968

Fig. 7



DATE OBSERVING IN- | BURSTI- FREQe | JUPITER To RANGE
PERIOD TEN-| NESS RANGE | LONGITUDE

1966 SITY MHZ

7 6 1110 2640

7 7 1107 2642

7 8 1104 2640

7 9 1101 2641

7 10 1058 2641

7 11 | 1055 2640

7 12 1052 2638 | 2008 2120 2 | SMOOTH 22-29 | 13361-17606 78.8— 88.9

7 13 1014 2635

714 1012 2632

7:15 1043 2629

7 16 1041 2626

74 1038 2622

7 8 | 1035 2629

719 1032 2616

7 20 1029 2613

7 21 1026 2610

7 22 1025 2607

7 23 1020 2604

7 24 1017 2601

7 25 1014 2558

T 26 1012 2555

7 27 1009 2551

7 28 1006 2548 | 1700 1705 2 | SMOOTH 22-25 | 264e8-26769 64e5— 6502

7 29 1003 2545

7 30 1000 2542 3 | SMOOTH 22-34 | 13365-15202 FH—e3~ FBT

731 0957 2359

8 1 | 0955 2535

8 2 0952 2532

8 3 0949 2529

8 4 0946 2525

8 5 0943 2522

8 6 0941 2539 | 1558 1637 1 | WEAK 22-31 | 1405-16400 8503~ 9008

8 7 0938 1230

8 8 0935 1229

89 1055 1229

8 10 0929 «1129

8 11 0926 1129

8 12 0923 «5330

8 13 0922 1130

8 4 0920 1130

8 15 0938 LYS

8 16 0929 «1138

8 7 0919 «231

818 0926 611233

89 0928 «£230

8 20 0903 1200

8 21 0857 1201

8 22 0854 1200

8 23 O851 1159 3 | SMOOTH T3~16 | 32706-34705 | 25204-25701

8 24 0848 1200 | 0953 1050 2 | MODERATE | 12-34 | 10605-24100 9301-10161

8 25 0845 1201

8 26 0843 1200

8 26 1200 1425

8 27 0840 1201 2 | WEAK 12-14 | 22001-24006 | 34803-35301

8 28 0837 1059

8 29 0834 1260

8 30 0840 1225 1 | SMOOTH E4~23B | B2304— 2008 | 24100-25406

8 31 0848 1404 2 | STRONG 11-34 93e2-¥S50l 7965-10069

DENOTES SPECIAL OBSERVING PERIOD

=3+

WHEN 10-RELATEO EMISSIONS WERE

POSS IBLE.



distribution of lines is due partly to Io's influence, partly to the near
commensurabilities of the periods of Jupiter and Io, and partly to the
24 hour period of a single observer on the earth. Figure 5 shows the
(LCM, $._) path from beginning to end of each observation interval
(time when Jupiter was in the antenna beam). The uneven distribution
of observations is quite evident, despite the fact that Jupiter was
observed for 3270 hours (corresponding to an average of 324 rotations
of Jupiter or 77 revolutions of Io).

Figures 6 through 10 are similar plots for the 1968 apparition.
The low emission probability is evident, especially in the main and
3rd source regions. Especially notable are the relatively large number
of events (compared to previous years) occurring near $49 = 240° and
60° < LCM < 180°,

Figures 11 through 13 are similar plots of combined emissions
and observations for the apparitions of 1961 through 1968. Figure
14 shows the emission probabilities vs, LCM for each apparition of
1961 through 1968. The drift of histogram features toward greater
longitudes seems to have stopped in 1967, and the drift may be reversed
in 1968.

-2-



DATE OBSERVING JUPITER IN~ |BURSTI~ FREQ. | JUPITER Io RANGE
PERIOD OBSER~ TEN-|NESS RANGE | LONGITUDE
1968 VATIONS SITY MHZ
110 0309 1338| 0654 0754 2 |STRONG 13-24 | 23709-27402 | 34666-35501
0942 1018 3 [STRONG 12-16 |3390¢4— 1le2 1003- 1564
111i 0307 1339) 1154 1314 3 |MODERATE| 16-33 | 209¢8-25802 | 23205-24348
112 0307 1340
1:13 0309 1340] 0408 0426 1 [WEAK 26-30 | 22905-24004 | 21368-21663
0642 0715 2 |MODERATE] 13-20 | 32266-34206 | 23566-24002
0753 0848 2 |STRONG 13~22 5e5- 3868 | 24506-25364
114 0307 1340
115 0307 0925] 0756 0900 1 [MODERATE] 12-19 | 308¢7-34704 | 29301-30202
115 1000 1341
1 16 0307 1336
117 0339 1338
1:18 0307 1337
119 0308 1345
1 20 0226 1340] 0801 0819 2 |STRONG 11-18 | 34561-35600 | 23109-23404
0920 1006 2 |MODERATE| 13-18 B20e8— 6007 | 24301-24906
1221 0222 1340] 0344 0443 3 |MODERATE| 11-18 |340+3- 1640 3B9e2- 4705
1 22 0217 1337) 0748 0808 1 |WEAK 12-14 |278+5-29006 | 27762-28000
1 23 0213 1336} 0606 0639 3 |MODERATE] 14-17 Te6~ 2705 |106e3-11160
b 24 0209 1338) 0558 0612 1 [MODERATE] 14-16 [15364-16149 | 30867-31007
1 25 0204 1342
1 26 0202 1337
127 0203 1340] 0514 0623 1 |WEAK 14-29 |21868-26005 |19344-20361
1100 1129 2 |STRONG 12-18 68e0- 8565 |24203-24604
1 28 0202 1340] 0853 1015 1 |STRONG 12-17 |14169-19105 68e0- 7966
1 29 0213 1349] 0528 0536 1 = |MODERATE| 15-17 |1684¢7~-173065 | 24205-24307
0618 0713 3 |STRONG 14-22 |19 23202 | 24906-25704
0942 1050 2 |MODERATE] 13-17 |32202- 364 |278e4-288e1
1 30 0202 1336/ 0708 0802 3 |STRONG 12-18 19¢8- 5265 |10002-10768
1 31 0202 1342
" .
21 0156 1337] 0158 0212 2 |MODERATE| 27-35 |133«8-14203 |10365~10505
2 2 0205 1341
2 3 0203 1335] 0625 0731 1 |STRONG 12-28 |236¢6-27605 |18866-19840
0815 0855 1 |MODERATE) 12-14 |303¢1-327¢3 | 20402-20908
0927 1007 1 |STRONG 12-16 |[34667- 1009 [21404-22000
24 0207 1338
2.5 0233 1337) 0724 0959 3 |STRONG 12-26 |21306-307¢3 [24402-26601
2 6 0207 1331] 0556 0617 2 |STRONG 14-16 |31101-32348 T5e3- 783
0840 1015 3  |STRONG 15-17 5003-1O7Te7 9825-11169
2 7 0202 1337] 0709 0723 2 |MODERATE|] 12-15 [14569-15464 /289¢2-29102
0920 1120 2 |STRONG L1-18 [22561-29707 |307¢7-32407
*2 8 0101 0200
2 8 0200 1336] 0220 0408 3 |WEAK 23-36 |121+9-18762 9169-10762
0603 0621 1 |MODERATE| 16-18 [25667-26766 |12365~-12600
29 0202 1337
210 0209 1340] 0433 0443 1 |MODERATE) 15-17 [14347-14968 |15801-15905
0510 0522 2 |WEAK 15-17 |16601-17364 |16363-16540
0632 0640 2 |WEAK 22-26 |215e7-22005 |174e9-17600
211 0209 1341
212 0204 1335| 0825 1018 2 |STRONG 13-30 [22563-29366 | 23801-25401
213 0213 1337] 1035 1153 2 |STRONG 12-17 9406-14167 | 100e1-1llel
214 0203 1335] 0336 0442 3 |STRONG 12-22 [352¢0- 3169 |24404-25367
1116 «#1125 2 |MODERATE) 19-22 [27001-27565 |309e4~-31007
* 2:15 0121 0200
215 0202 1335 | 0328 0524 3 |STRONG 11-34 /137+68-20840 8669-10363
0631 0650 1 |MODERATE] 13-16 [24825-26060 [11247-11564
216 0202 1343
217 0207 1340] 0843 0854 3 |STRONG 12-18 |269¢7-27663 {1787-18003
2:18 0207 1341
219 0207 1335] 0906 1018 2  |STRONG 20-30 [22469-26804 [22942-23904
2 20 0207 1424) 1153 1245 3  |STRONG 12-36 |116+5-148.0 9604-10368
2 21 0213 1250] 0512 0525 2 |MODERATE| 16-20 24e8- 3207 [24353-24502

-15-



DATE OBSERVING JUPITER IN~ | BURSTI~ FREQ» | JUPITER To RANGE
PERIOD OBSER- TEN-| NESS RANGE | LONGITUDE
1966 VATIONS SITY MHZ
10 12 0618 1230
10 13 0617 1230
10 14 0617 1229
*10 14 1416 1857 | 1718 1832 2 | STRONG 25-36 | 12862-17360 B6e4—- 9609
10 15 0619 1230/0908 1020 1 | SMOOTH 13-17 | 342e5~- 2600 | 22006-23068
10 16 0618 12230 | 0926 1023 3 | STRONG ¥5-26 | 14309-17863 66e5— THbo
10 17 0617 1229 | 0634 0703 3 | MODERATE | 15-19 | 19004-20709 | 24506-24907
0756 0814 1 | MODERATE | 14-23 | 24000-25008 | 25762-25907
10 18 0636 1228
10 19 0618 1229 | 0926 1055 2 | STRONG 14-20 | 23504-28902 | 32668-32903
10 20 0617 1230
10 21 0544 1236
10 22 0541 1240
10 23 0537 1240
10 24 0918 4241
10 25 0531 12460 | 0900 1101 2 | MODERATE | 12-16 4209-11600 9345-11006
10 26 0528 1241] 1025 1122 1 | WEAK 12-19 | 244e7~279e2 | 309e0—31760
10 27 0524 1244
10 28 0521 1239
10 29 0518 1240 | 0933 0939 3 | MODERATE | I5-17 | 3050-30806 | 19269-19207
10 30 0518 1301
10 31 0517 1259 | 0854 1025 2 | STRONG 14-34 | 22205-27705 | 23303-24601
11061 0518 1300
*11 1 1300 1335
11 2 0522 13259
11 3 0517 1259
*11 3 1507 1900
ll 4 0518 1259
115 0453 1330 | 0905 1220 1 | STRONG 12-17 | 26260-3436 | 17260-19161
n 6 0450. 1330
11 $7 0446 1329 | 0547 0640 1 | STRONG 22-17 B3e4—-11504 | 19100-19804
0924 1120 2 | MODERATE | 12-30 | 21406-28467 | 22106-23800
1135 41235 2 | MODERATE | 12-18 | 29308-33000 | 24001-24806
Il 8 0442 1509 | 0650 0810 1 | MODERATE | 12-21 | 27201-32004 4304- 54eT
1236 1415 3 | MODERATE | 20-37 | 12162-18101 9243-10602
ll o9 0735 1330
11 10 0434 1300
*11 «10 1458 1900
1111 0430 1331
11 12 0426 1330/1113 1201 1 | MODERATE | 12-20 | 31304-34204 | 174e3-18lel
11 13 0422 1330
11 14 0418 1330/1008 1225 1 | MODERATE | 12-32 | 21503-29801 | 21262-23165
11015 0418 1330 | 0612 0631 1 | MODERATE | 12~18 | 22362-23407 2203- 2540
0709 0832 2 | STRONG 12-25 | 25706~30768 B0e4- 4201
*11 15 1330 1518 | 1354 1452 2 | MODERATE | 24-34 | 14265-17706 B7e6- 9508
11 16 0418 1332
1117 0418 1331 | 0603 0627 1 | STRONG 12-22 | 15849-17365 68e0- Tled
0823 1157 1 | STRONG 12-16 | 24306- 1300 8767-11860
11 18 0957 1329
11:19 0418 1330 | 0932 1038 2 | STRONG 12-25 | 22605-26664 | 1444-15367
11 20 0418 1330 | 0537 0915 1 | MODERATE | 12-20 | 235¢0- 608 | 31406-34504
Tl 21 0417 1329
11 22 0347 1335 | 0835 1100 1 | MODERATE | 12-17 | 28369~ 116 2700- 4705
11 23 0343 1330/0515 0610 1 | MODERATE | 15-19 | 31366-34649 | 20262-21040
0755 0927 1 | MODERATE | 12-17 5004-10600 | 22448-23748
1225 1252 1 | MODERATE | 13-23 | 21306-22949 | 262.9-261
1i 24 0339 1330 | 0636 0733 2 | STRONG 13-22 | 15362-18767 5Tel- 6502
0932 1000 1 | MODERATE | 15-24 | 25966-27605 B2e0- 8509

-5-



2 bis

2961 408, (seesbaq) oT
09¢ 749 082 24 002 091 021 08 Ob 0

=

uolss}w3 40 Ayliiqoqord

ry

0¢

ce


WORLD DATA CENTER A

Upper Atmosphere Geophysics

REPORT UAG~-3

OBSERVATION OF JUPITER’S SPORADIC RADIO
EMISSION IN THE RANGE 76-41 MHz
6 JULY 1966 THROUGH 8 SEPTEMBER 1968

rs

Z
Tw

November 1968



DATE OBSERVING JUPITER IN~ | BURSTI- FREQs | JUPITER To RANGE
PERIOD OBSER- TEN~| NESS RANGE | LONGITUDE

1967 VATIONS SITY MHZ

1 25 0118 1300 | 0312 0422 1. | SMOOTH 12-18 Lle5- 538 5005- 6004
0638 0838 3 | STRONG 11-20 | 136¢0-208+6 T9e6- 9606
0917 1056 2 | MODERATE | 12-22 | 23261-29240 | 10201-11601
1i22 1124 2 | MODERATE | 12-15 | 30767-30809 | 1198-12001
1200 1202 2 | MODERATE | 13-14 | 330¢7~-33109 | 125e2~12545

1 26 0218 1320 | 0457 0535 2 | MODERATE | 11-16 | 22506-24866 | 26900-27404
0620 0643 1 | WEAK 11-14 | 27568-28907 | 28048-28400
0655 0657 2 | WEAK 12-14 | 29700-298e2 | 28567-28660
0752 0826 1 | WEAK 12-16 | 33204-35200 | 29308-29806

1 27 0118 0803 | 0326 0437 2 | WEAK 10-15 | 322e2- 4e2 9968-10968
0620 0648 3 | WEAK 10-16 6604~ 8304 | 12464-12803
0659 0743 2 | WEAK 10-14 9000-11666 | 12949-13661

1 28 0117 13340 [0557 0812 1 | MODERATE | 12-23 | 20342-28408 | 32447-34307

129 O117 1322 | 0226 0432 1 | WEAK 12-21 | 22604-30265 | 13864-15602
1203 1259 1 | WEAK 12-29 | 21562-24960 | 22000-22769

1 30 0118 1337 | 0405 0504 1 | SMOOTH 12-14 7608-11265 | 35600- 404
0833 1011 1 | WEAK 11-23 | 23868-29861 3 — 4768

131 0118 1320 | 0406 0755 1 =| SMOOTH T1-19 | 228601- 606 | 199.8-23202
0848 1603 3 | WEAK 10-17 BBeb6- 8309 | 23967-25003

21 0147 1320 | 0721 0834 3 | STRONG 12-25 | 13606~180+7 T1eQ~ 8103

24 0132 1320/1000 1115 3 | MODERATE | 11-15 | 324e7- 1001 | 344e3-354069

2.5 0118 1320 | 0354 0411 2 | MODERATE | 16-27 | 25401-26463 | 13642-13806

2 6 0118 1320 | 0934 1002 2 | STRONG 13~24 | 25002-26701 2708- 3168

27 0118 1320 |0208 0350 2 | MODERATE | 16-36 | 13103-19209 | 16843-18268
0423 0551 1 | MODERATE | 12-29 | 21269-26601 | 18704-19909
0601 0858 2 | STRONG 11-23 | 27201- 1901 | 20163-22603

2 8 0117 #1321 |1120 1121 2 | STRONG 18-17 | 25506-25602 900- 9001

29 O117 1320 | 0453 0628 3 | STRONG 11-19 | 17202-22907 | 238.9-25.
0743 0820 2 | MODERATE | 11-20 | 27500-29704 | 26360-26802

2 10 0120 1320 | 0347 0400 3 | MODERATE | 13-18 | 28320-29009 7302- T7501
0648 0734 1 | MODERATE | 12-15 3205- 6003 9808-10543

211 Ol17 «1325 | 0739 1019 3 | MODERATE | 12-23 | 21329-31066 | 30905-33202

2:12 |-0101 1320 |0106 0132 2 | MODERATE | 22-35 | 12609-14246 9765~10162
0335 0622 1 | WEAK 12-23 | 217¢0-31709 | 11866-14202
0755 0805 1 | MODERATE | 11-14 W4e2- 2002 | 15503-15607

213 0118 0817

214 0150 1312

215 0128 1308

2 16 | -0213 1304 | 0619 0831 2 | SMOOTH 12+28 | 19805-27863 | 23601-25408

217 0117 1300

2 18 0125 1256 | 0223 0248 2 | MODERATE | 25-17) 35700- 1202 | 24909~25304
0847 0957 2 | MODERATE | 13~26 | 22962-27165 | 3042-31401

2 19 |-0009 1252/0113 0337 3 | MODERATE | 16-35 | 105+3~19204 8305-10369

2 20 0116 1247/1024 1200 1 | STRONG 12-17 | 22960-28761 4e9- 1805

2 21 |~-0029 1219

2 22 0117 #1231

2 23 0117 1200 | 0717 0912 3 | STRONG 12~35 | 207¢8-27703 | 22903-24505

2 24 0122 1200

2 25 0120 1200

2 26 0117 1200 | 0256 0400 2 | MODERATE | 19-28 | 14167-18004 8300- 9240
0630 0826 1 | MODERATE | 12-18" 11362-12966

2 27 0118 1200 | 09r8 1000 1 | STRONG 12-18 | 16361-18865 | 34005-34604
1046 1115 3 | MODERATE | 12-18 | 2163-23349 | 35269-35740

2 28 0117 1200

3°91 0117 1200

3 2 0121 1200 | 0629 1003 2 | MODERATE | 13-33] 15267-28260 | 20762-23765

3.3 0116 1200 | 0507 0549 2 | STRONG 16-25 | 25306-27960 3B9e2- 4501

~8-



DATE OBSERVING JUPITER IN~ | BURSTI- FREQe | JUPITER To RANGE
PERIOD OBSER- TEN~| NESS RANGE | LONGITUDE
1966 VATIONS SITY MHZ
12 27 0118 1331 | 0955 1030 1 | MODERATE | 12-16 | 20563-22665 | 32267-32706
1043 1105 2 | MODERATE | 13-22 | 234¢3-24706 | 3295-33206
12 28 0118 1320/0610 0625 1 | WEAK 12-14 | 21969-22869 | 13405-13606
0725 0805 3 | STRONG 10~19 | 26502-28904 | 14501-15007
0835 1013 3 | MODERATE | 11-23 | 307¢5- 668 | 15520-16868
1111 1120 2 | MODERATE | 13-19 4168- 4763 | 17760-17863
12 29 0118 1320
12 30 0119 1320 | 0734 0852 3 | MODERATE | 12-24 | 21201-25962 | 19306-20466
1102 1140 2 | MODERATE | 14-18 | 33762- 08 | 22268-22604
12 31 0117 #4320 | 1341 1227 1 | MODERATE | 12-18 | 15201-17909 T2el- 7866
1967
12 0832 1320
1 3 0118 1321
1 4 0118 1320
1 5 0118 OF40
1 5 0835 1332 )28I5 1123 1 | WEAK 15-17 | 16969-17407 605- 706
1211 1312 3 | MODERATE | 12-23 | 20367-24006 14e4— 2360
1 6 0125 1335 | 0839 0848 1 | WEAK 20-30 | 22642-23146 | 18841-18963
0940 1023 1 | STRONG 13-22 | 26360-28960 | 19607-20268
1 67 0126 1320
1 8 0021 1320 | 0920 0954 3 | STRONG 16-20 | 19203-21269 | 24161-24569
1019 1036 2 | STRONG 16-25 | 22800-23803 | 24904-25168
1057 #1113 2 | STRONG 12=23 | 25160-26067 | 2546
1 9 O116 3329 | 0542 0554 2 | WEAK 12-14 | 21163-21865 536
1038 1259 3 | MODERATE | 10-15 BOe2— 7902 B56
110 O118 1324 | 0329 0548 2 | SMOOTH 11-18 | 28165-5066
121 0120 1320 | 0443 0542 3 | SMOOTH 12-38 | 11700-15267
0610 0633 2 | WEAK 34-36 | 16906-18365 | 10561-10863
0940 1000 3 | MODERATE | 13~16 | 29605-30806 | 13408-13706
1049 1102 1 | MODERATE | 14-17 | 33862-34601 | 14405-14603
1 r2 0122 3321 | 0337 0524 2 | SMOOTH 13-18 | 22768-29205 | 28760-30202
0539 0601 1 | MODERATE | 13-21 | 30105-31408 | 3043-30704
1 3 Or19 #1325 | 0933 11231 2 | MODERATE | 11-22 | 23367-30500 | 18100-19767
1158 «12218 1 | MODERATE | 12-15 | 32144-33365 | 20165-20403
14 0130 2330
1 15 | ~-0012 1340/0223 0259 1 | WEAK 10-17 | 27500-29668 | 16764-17205
0330 0439 2 | SMGOTH 10-19 | 31506-35703 | 17609-18606
1016 1228 3 | MODERATE | 16-34 | 20160-28008 | 23463-25340
1 16 0128 0520
1 16 1245 4317
117 0118 1320 | 0204 0349 2 | MODERATE | 12-32 | 20500-26844 | 21200-22608
0407 0420 3 | MODERATE | 12-19 | 27903-28762 | 22943-23102
0450 0705 3 |MODERATE | 11-23 | 30503- 2669 | 23504-25465
1101 1109 1 | MODERATE | 12-18 | 16906-17404 | 28749-28900
1:18 O118 3327 | 0505 0528 1 | WEAK 13-31 | 105e1-11960 B1le2- 8404
0554 0753 3 |MODERATE | 11-36 | 13467-20666 88 o1-10469
0923 0959 1 |MODERATE | 13-16 | 26161-28268 | 11766-12267
119 0118 1320 | 0512 0613 2 | WEAK 13-17 | 26000-29609 | 28508-29404
1 20 0118 1320 | 0837 0843 1 | WEAK 12-15 | 17465-17802 | 15. 15902
0955 1005 1 | WEAK 11-15 | 22107-22707 | 16964-17068
1025 1235 2 | MODERATE | 10-21 | 239+8-318+4 | 17326-19240
121 0121 1344 | 0740 0912 3 | MODERATE | 12-24 | 29008-34604 | 35309- 609
1 22 0118 2320 | 0339 0550 2 | WEAK 11-25 | 295¢8- 1500 | 16365-18200
0733 0738 2 | STRONG 11-16 T703- 8003 | 19665-19703
1108 1300 3 |MODERATE | 14=26 | 20702-27409 | 22649-24208
1 23 0118 1320/0750 1252 3 |MODERATE | 11-23 | 23802- 6008 4206~ 8543
1 23 1320 1440
1 24 0118 1320 | 0302 0828 3 | WEAK 12-27 | 214e7~ 5208 | 20565-25105

-7-



EMISSION PLOT, 1968

360 [ mr — TT mT TT TT TT TMT oT TT TMT mT 7
330r . | 7
bt J
300P > 4 i 7
L __, + == 4
r - - To J
270 i
fC en] ee ns
A et == ae 4
ao — an | nt —|
L + 4
b— Jar —
—t
210 x — =
180P a a
L 4 — —T ao
150 — 1
[ | 4— ]
120 — =
a — — |—
, — | et EE be ae a 7
sol 4 4 | [_ =
F 4 | ET —_ 4
601 + = -
-— a _— ag
30 — J
r 4a" a —4
fay rears OO PO EO OE PO

Oo 30 60 90 120 150 180 210 240 270 300 330 360
LCM (DEGREES)

Fig. 9



To, LCM PROBABILITY CONTOUR MAP, YEAR 1968, CONTOUR INTERVAL .IO
360 7 as ee ee

ee a

300

240

180

Io r

120

au
Cl ST 4

60

Ny

© © 30 60 90 120 150 160 210 240 270 300 330 360

LCM (DEGREES)

Fig. 8



DATE OBSERVING JUPITER IN- | BURSTI-~ FREQs | JUPITER To RANGE
PERIOD OBSER— TEN-| NESS RANGE | LONGITUDE
1966 VATIONS SITY MHZ
91 0838 1200
9 2 0840 4200 | 0954 1040 2 | SMOOTH 12-19 2007 4865 | 12360-12905
*9 2 1200 1741
9 3 0819 1059
9 4 0817 t200
9 5 0812 1200 | 0911 0953 1 | SMOOTH 10-24 8509-11103 6e9- 1268
* 9 5 | 1800 2359
9 6 0809 1200/0953 1011 1 | MODERATE | 13-24 | 26367-27206 | 21661-21867
r121)— 1200 2 | SMOOTH LI-15 | 31469-33805 | 22806-23401
9 7 0806 1200
*9 7 1200 1357 | 1224 1252 1 | STRONG 16-24 | 14305-16004 B08 Bae7
9 8 0803 1225 | 1015 L145 1 | MODERATE | 12-38 | 21509-27003: | 26509-27807
9 9 O759 1201
*9o 9 1500 1900
910 0756 1203
9 tl 0753 1202 | 0853 .0925 2 | WEAK 10-18 | 25705-27609 | 14403-14868
1011 1044 1) WEAK 12-I% |. 30407-32406 | 15563-160+0
9 12 0750 1201
*9 12 1848 2321 | 2127 2217 2 | STRONG 23-35 | 14368-17401 94e1~10lel
9 33 0747 «F201
9 14 0750 1200 | 0830 0852 2 | MODERATE | 12-17 | 33409-34802 Blel-— 3hHe2
9 15 0747 1329/1108 1200 1 | WEAK 11-18 | 22009-25204 | 25607-26400
1200 1225 2 | STRONG 13-27 | 252¢4—26705 | 26400-26765
1300 1319 3 | MODERATE | 16-23 | 28866-30061 | 27265-275624#|
9 16 0749 1200 | 0810 1030 2 | WEAK 12-19 | 26347-34864 Th eI 9406
917 0747 1201
918 0747 1201 | 0813 0850 2 | WEAK 12-14 | 20604-22868 | 12200-12702
0920 1025 2 | WEAK 12-18 | 24609-28602 | 13164-14006
919 0751 1200 | 0952 1000 1 | WEAK 12-16 56eT— 6105 | 33902-34004
1019 «#1105 1 | WEAK 15-35 7320-10008 | 34301-34966
9 20 0748 1240 | 1027 1208 3 | STRONG 12-26 | 22843-28964 | 18706-20168
9 21 O721 1230 | 0917 0953 2 | STRONG 12-18 | 33604-35802 2160~ 2661
9 22 0718 1230/1107 1215 2 | STRONG 14-25 | 19304-23405 | 24000-24906
9 23 0715 1230
9 24 0711 1230
9 25 0708 1230
9 26 O707 1229 | 0829 0846 1 | MODERATE | 13-16 | 339¢7-35040 | 31100-3134
9 27 0702 1230 | 0923 1000 1 | MODERATE | 12-28 | 16268-18501 | 16260-16742
* 9 27 1230 1243
9 28 0710 1234
9 29 0702 1229
9 30 0703 1229
10 1 0702 1235 | 0733 0857 1 | MODERATE | 12-18 | 33802- 2809 | 23909-25107
10 2 0704 1230 | 0737 0923 2 | STRONG 12-36 | 13161-19502 83e8- 9867
10 3 0703) «1227
10 4 0705 3230
*10 0 & 1230 3351
10 «65 0704 1230
10 6 0634 1231
10 =7 0630 1230
#10 7 1230 18600 | 1552 1727 3 | MODERATE | 17-39 | 102+7-260«2 9005-10369
10 8 0627 1230 | 0812 0907 2 | WEAK 10-19 | 335e1- Be4 | 22869-23607
0945 0958 1 | MODERATE | 23-19 Ble4— 3902 | 24201-24309
10.69 0624 1230
#10 9 1900 2148
10 10 0620 1230
10 11 0617 1230 | 0647 O727 2 | STRONG 14-17 W502— 3904 | 10701-11267
*10 21 1230 1500

#* EMISSION OCCURRED WHEN ANTENNAS WERE TRACKING SUNe
FROM SUN AND OUTSIDE THE NOMINAL BEAMWIDTH OF THE ANTENNAS«

“4a

JUPITER WAS ABOUT 40 DEGe



DATE OBSERVING JUPITER IN- |BURSTI- FREQe |JUPITER Io RANGE
PERIOD OBSER- TEN— |NESS. RANGE {LONGITUDE
1968 VATIONS SITY MHZ
5 26 0200 0756
5 27 0234 0752
5 28 0247 0730
5 29 0239 O745
5 30 0237 «O741
5 31 0232 0738
6 1 0233 0657
6 2 0232 0730] 0231 0335 2 |MODERATE| 25-34 [1597-19804 9700-10601
6 3 0003 0200
6 3 0200 O727
6 4& 0232 0723
6 5 0233 0720
6 6 0232 O716
6 7 0233 0700
6 8 0240 0708
69 0235 0706 | 0307 0351 2 |WEAK 22-30 |15368-18004 B5e6— 9168
6 10 0251 0656
611 0232 0659
6 12 0232 0655
6 13 0232 0652
6 14 0238 0648
6 15 0232 0645
6 16 0238 0641
617 0235 0638
618 0232 0634
6 21 0233 0510
6 22 0244 O511
6 23 0247 O511
6 24 0256 0531
6 25 0248 0532
6 26 0248 0532
6 26 1917 2202
6 27 0234 0511
6 28 0233 0510
6 29 0026 0230
6 29 0230 0510
6 30 0234 OS11
TOL 0248 0530
7 2 0250 0531
7 3 0251 0533
T 4 0247 0529
7 5 0230 0510
7 6 0055 0230
7 6 0230 0510
7 7 0232 0510
7 8 0249 0524
7 9 0257 0520
7 10 0239 0510
TUL 0255 0510
712 0238 0510
713 0237 0506
7 4 0233 0503
7 15 0230 0459
7 16 0235 0456
717 0228 0452
718 0321 0449
719 0218 0430
7 20 0219 0430
7 21 0223 0430
7 22 0218 0435

-18-



OBSERVATION PLOT FOR THE APPARITION OF 1967

6
a
300 =
240 fee

VAIN
aa WANA
ANNO
WANA

ANN

LAN \

\\\\"

360

Vl
\\\

\\
\

150 180 210 240. 270 300 330

120

2

\\\\i

=

LCM (Degrees)

Fig. 5




DATE OBSERVING JUPITER IN |BURSTI-— FREQs | JUPITER To RANGE
PERIOD OBSER- TEN~ |NESS RANGE | LONGITUDE
1967 VATIONS SITY MHZ

21 0248 0520
21 1349 2000
22 0247 0526
23 0248 0513
24 0247 0510
25 0247 0506
26 0247 0503
26 2200 2600
27 0200 0459
28 0248 0456
28 1400 1900
29 0247 0453
30 0250 0449

1 0247 0446) 2047 2120 2 |SMOOTH 22-36 | 14668-16667 9601~10068%*
2 0247 0442
3 0247 0439
3 2300 2700
4 0300 0435
5 0106 0439
6 0247 0401
7 0244 0400
8 0247 0400] 2132 2203 1 |SMOOTH 24-33 | 14601-16408 B5e4—- B9eBRe
9 0247 0400
0247 0400
tl 0e@00 0102
12 0119 0460
Tl 1254 2800
12 1251 2800
13 1249 2800
14 1246 2758
15 1244 2754
16 1241 2751
17 1239 2748
18 1236 2744
19 1234 2741
20 1231 42700
21 1229 2700
22 | 1226 2700
23 1224 2700
24 1221 2700
25 1219 2700
26 1219 «2700
27 1219 2700
268 1219 «2700
29 1219 «42700
30 1238 2700
31 1219 2700

NANA ANAS ANAS SNA SSN momma maaanaamD
»
°

6 1] 1219 2658
8 2 1220 2600
8 3 1221 «2650
8 4 1219 2647
6 5 1221 2643
8 6 1220 2640
8 7 1219 2600
8 8 1228 2600
8 9 1229 2600
8 10 1227 2600

* DENOTES SPECIAL OBSERVING PERIOD WHEN Io-RELATED EMISSIONS WERE POSSIBLEe
#* EMISSION OCCURRED WHEN ANTENNAS WERE TRACKING SUN» JUPITER WAS ABOUT 40 DEGe
FROM SUN AND OUTSIDE THE NOMINAL BEAMWIDTH OF THE ANTENNAS«

-11- :



DATE OBSERVING JUPITER IN~ | BURSTI~ FREQ» | JUPITER To RANGE
PERIOD OBSER- ITEN-| NESS RANGE | LONGITUDE
1967 VATIONS SITY MHZ
lo 1 0919 1237
10 2 0918 1237
10 3 0918 1300
*10 3 1300 2000/1745 1815 2 |MODERATE| 27-38 | 128¢7-14609 9904-10306
10 4 0927 1229/1050 1105 1 | WEAK 14-18 2803- 3703 |24401-24602
10 «5 0920 1230
10 6 0850 1241
10 7 0847 1200
*10 7 1200 1600
10 8 0844 1230
10 9 0841 1230
10 10 0838 1230
¥10 10 1555 2001
io 11 0835 1238
10 12 0832 1230
10 13 0843 1230
10 14 0827 «#1231
lo 15 0843 1230
10 16 0827 1231
10 17 0827 1239
*10 «17 1705 42105
10 18 0833 1226
10 19 0828 1229
10 20 0828 1241 |1019 1035 1 |MODERATE| 15-22 | 25663-26600 [25301-25543
10 21 0802 1243
10 22 0759 1241
10 23 0756 1236
10 24 O752 1236
10 25 0749 1235
10 26 0746 1235
10 27 0746 1236 | 1004 12115 1 |MODERATE| 18-35 | 22004-26304 |23404-24405
10 28 0747 1240
10 29 0745 1240
10 30 O751 1310
10 31 0754 1232
Tl 21 0747 1238
112 0807 1264
113 0811 1240 | 0837 0922 2 |WEAK 14-16 | 14161-26864 [20566-21260
1130 1149 2 [MODERATE] 13-18 |245¢7-257e2 |23001-23208
1104 0747 1200
ell 4 1200 1515 [1330 1503 2 | STRONG 26-36 | 108+8~-165+0 9004-10305
11 65 0747 1240
11 6 0754 1239/0818 0839 2 |MODERATE| 21-15 |221¢1~23308
0852 1105 1 |MODERATE| 12-17 | 241¢0-32260 97 eT-11607
*1l 6 1657 2040
11 7 0731 1331
il 8 0719 1330
11 10 0719 1342
11°11 0717 1330 [0953 1056 2 |MODERATE| 11-22 |311¢0-349e1
1123 (1132 2 |MODERATE| 12-14 5e4- 1008 5602— 5705
*11 121 1330 1700
11 12 0737 1330
11 (13 0723 #1328 |1118 1133 2 |MODERATE| 12-17 | 30304-31204 [10203-10404
1153) 1217 3 |MODERATE| 13-17 |32405-33900 [1072-11006
11 33 1701 2104
11 (14 0724 1335
11 15 0720 1327
11:16 0726 1330 |0923 0944 1 |MODERATE| 13-18 [32564-33861 |33603-33902
11°17 0719 41329
11:18 0717 1330 |1101 1123 1 |MODERATE| 12-17 |325+7-33940 3609- 4060
11:39 0818 1334

-13-



WORLD DATA CENTER A

Upper Atmosphere Geophysics

REPORT UAG-3

OBSERVATIONS OF JUPITER’S SPORADIC RADIO
EMISSION IN THE RANGE 76-41 MHz
6 JULY 1966 THROUGH 8 SEPTEMBER 1968
by
James W. Warwick and George A. Dulk

Department of Astro-Geophysics
University of Colorado
Boulder, Colorado

Wy

Prepared by Research Laboratories, ESSA, Boulder, Colorado

and published by We
U.S. DEPARTMENT OF COMMERCE

ENVIRONMENTAL SCIENCE SERVICES ADMINISTRATION

ENVIRONMENTAL DATA SERVICE
ASHEVILLE, NORTH CAROLINA, USA 28801

November 1968

SUBSCRIPTION PRICE: $9.00 a year; $2.50 additional for foreign mailing; single copy
price varies.* Checks and money orders should be made payable to the Superintendent of
Documents. Remittance and correspondence regarding subscriptions should be sent to the
Superintendent of Documents, Government Printing Office, Washington, D.C. 20402.

“price of this issue 30 cents



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demote 196


WORLD DATA CENTER A

National Academy of Sciences
2101 Constitution Avenue, N, W. Washington, D, GC. U.S.A., 20418

—

World Data Center A consists of the Coordination Office

and eight subcenters:

World Data Center A
Coordination Office

National Academy of Sciences

2101 Constitution Avenue, N.W.

Washington, D, C., U.S.A. 20418

Telephone (202) 961-1404

Airglow, Aurora (Instrumental and Visual):
Cosmic Rays, Ionosphere and Solar Activity:
World Data Center A:
Upper Atmosphere Geophysics
Environmental Science Services
Administration
Boulder, Colorado, U.S.A. 80302
Telephone (303) 447-1000 Ext. 3654

Geomagnetism, Seismology, Gravity and Tsunami:
World Data Center A:
Geomagnetism, Seismology, Gravity & Tsunami
Environmental Data Service, ESSA
Rockville, Maryland, U.S.A. 20852
Telephone (301) 496-8160

Glaciology:
World Data Center A:
Glaciology
American Geographical Society
Broadway at 156th Street
New York, New York, U.S.A. 10032
Telephone (212) 234-8100

Longitude and Latitude:
World Data Center A:
Longitude & Latitude
U.S. Naval Observatory
Washington, D.C., U.S.A. 20390
Telephone (202) 698-8422

Notes:

Meteorology (and Nuclear Radiation):
World Data Center A:
Meteorology
National Weather Records Center
Asheville, North Carolina, U.S.A, 28801
Telephone (704) 253-0481

Oceanography:
World Data Center A:
Oceanography
Building 160
Second and N Streets, S.E.
Washington, D, C., U.S.A. 20390
Telephone (202) 698-3753

Rockets and Satellites;
World Data Center A:

Rockets and Satellites
National Academy of Sciences
2101 Constitution Avenue, N.W.
Washington, D, C., U.S.A, 20418
Telephone (202) 961-1404

Upper Mantle Project:
World Data Center A:
Upper Mantle Project
Lamont Geological Observatory
Palisades, New York, U.S.A. 10964
Telephone (914) 359-2900 Ext. 209

(1) World Data Centers conduct international exchange of geophysical observations in accordance
with the principles set forth by the International Council of Scientific Unions. WDC-A is established
in the United States under the auspices of the National Academy of Sciences.

(2) Communications regarding data interchange matters in general and World Data Center A as a
whole should be addressed to: World Data Center A, Coordination Office (see address above),

(3) Inquiries and communications concerning data in specific disciplines should be addressed to
the appropriate subcenter listed above.



g

PROBABILITY OF EMISSION

-25

05

{20 160

LCM (DEGREES)

Fig. ll

200

YEAR

240

I96I-68



PROBABILITY OF EMISSION

25

Fig. 6

20

15

10 '-

05 Ly ‘a 1

0

© 40 80 120. 160 200 240 280 320 360
LCM (DEGREES) YEAR 1968



DATE OBSERVING JUPITER IN- | BURSTI~ FREQe | JUPITER Io RANGE
PERIOD OBSER- TEN~| NESS. RANGE | LONGITUDE

1967 VATIONS SITY! MHZ

3.4 0117 #1156] 1031 1154 1 | SMOOTH 13-16 | 24001-29002 | 28805-30002

3°05 0117 4152/0553 0738 1 | MODERATE | 16-25 | 22205-28640 9Zo7~107e6

3 6 0118 1248 | 0827 0841 2 | STRONG 16-22 | 10602-11407 | 31840-32000

3.7 0118 1244

3 8 0142 1140

3.9 0121 II36 | 0844 1041 1 | WEAK 14-18 | 208¢0-278+7 | 21009-22765

3 10 0118 1130

3121 0117 1128 | 0915 0937 1 | MODERATE | 15-18 | 167¢8-18161 | 26263-26504

3 12 0121 «1124

3°13 0118 1120] 0525 0549 1 | MODERATE | 26-20 | 32908-34403 | 27669-28003

3.14 0118 41116

3:15 0119 1212

3 16 0118 1108

317 0118 1104

3 18; -0012 0830

318 0903 4230

3.19 0117 1056

3 20 0118 1052

3 21 0128 1030 | 0623 0705 2 | WEAK 16-25 | 12867-15401 | 11209-11868

3 22 0119 1032

3 22 1959 2400 | 2213 2332 1 | WEAK 22-35 | 13365-18162 9006-10107

3 23 0006 1030

3 24 0120 1030

3°25 0117 1030

3 26 0120 1028

3 27 O118 1024

3 28 0118 1020

3 29 0117 1016

3 29 2107 2500

3 30 0100 1012

3 31 0117 «+1008

4 1 0117 1005

4 2 0117 «1001

4 3 0118 0958 | 0451 0520 1 | WEAK 28-30 | 22809-24605 | 22407-22868

& 4 0120 0954/0718 0835 3 | MODERATE | 20-36 | 108+2-154e7 88e9- 9907

4 5 0116 0950

4 6 O147 0947 | 0454 0508 2 | WEAK 16-20 | 32200-33005 | 11564-11764

4 7 0120 0929

4 8 0148 0730

4 8 0807 6930

4 9 0148 0925

416 0147 0932

411 0147 «0929

4 12 0147 0925

413 0147 #0922

414 0152 0928

4 15 0148 0914

4 16 0147 0911

417 0147 0907 | 0546 0651 1 | WEAK 227-30 | 207¢9-24702 | 20002~20904

4 18 0149 0904

4 18 2031 2400

4 19 0000 0900

& 20 0147 0857

4 21 0212 0848

4& 22 0203 0849

4 23 0202 0830

4& 24 0200 0830 | 0637 0715 1 | MODERATE | 20-30 | 21263-23403 | 19100-19604

4

0202

0830

~9-



DATE OBSERVING JUPITER IN- | BURSTI- FREQs | JUPITER Io RANGE
PERIOD OBSER- TEN-|NESS RANGE | LONGITUDE
1967 VATIONS SITY MHZ
8 11 1228 1410
811 1620 2555
8 12 1228 2540
8 13 1233 2135
8 13 2165 2600
814 1220 2103
8 15 1758 2019
8 16} 1800 1947
8 17 1838 1950
8 18 1859 2600
819 1232 2556
8 20 1232 2554
8 21 1104 2551
8 22 1101 2548
8 23 1058 2545
8 24 1055 2542
8 25 1052 2455
8 26 1049 2457
8 27 1050 2458] 1233 1337 2 | SMOOTH 26-35 |13602-17469 9302-10202
8 28 1044 1911
8 29 1051 1935
8 29 1955 2033
8 29 2100 2523
8 30 1200 1430
8 30 1440 2508
8 31 1940 2515
9 1 1049 2512
9 2 1050 2500
9 3 1049 2856
9 4 1049 2502
9 5 1045 2456
9 6 | 1019 1752
9 6 2140 2645
9 7 1016 2436
9 8 1013) 1424
9 8 1436 2440) 2141 2350 2 |STRONG 25-36 [11167-18967 9001-10863
9 9 1010 2431
9 10 1007 2429
911 1004 2423/1110 1130 1 |SMOOTH 15-17 }18103-19304 [25069-25307
9 12 1001 1219
913 0958 1221
914 0955 1223
9 15 0952 1221
9 16 0949 1215/1108 1140 2 [WEAK 12-21 [21200-23104 |18741-19106
9:17 0951 1227
9 18 0949 1223
9 19 0947 1223
9 20 0947 1221
9 21 0934 1230
9 22 0931 1230
9 23 0928 1502
9 24 0928 1230
9 25 0922 1230
9 26 O919 1230
9 27 0919 1230) 0932 1002 2 |MODERATE| 12-17 Be2- 2663 |249.9-25461
9 28 0917 1231
9 29 0931 1231
9 30 0918 1300
* 9 30 1300 1501

-12-