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National Bureau of Standards Library. N.W. Bldg Reference book not to be taken from the library. CRPL-F 241 flit 1 FOR OFFICIAL USE PART A IONOSPHERIC DATA ISSUED SEPTEMBER 1964 U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS CENTRAL RADIO PROPAGATION LABORATORY BOULDER, COLORADO

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Page 1: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

National Bureau of Standards Library. N.W. Bldg

Reference book not to be taken from the library.

CRPL-F 241 flit 1 FOR OFFICIAL USE

PART A

IONOSPHERIC DATA

ISSUED SEPTEMBER 1964

U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS

CENTRAL RADIO PROPAGATION LABORATORY BOULDER, COLORADO

Page 2: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution
Page 3: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

CRPL-F 241

PART A

NATIONAL BUREAU OF STANDARDS CENTRAL RADIO PROPAGATION LABORATORY

BOULDER, COLORADO

Issued

30 Sept. 1964

IONOSPHERIC DATA

CONTENTS

Page

Ionospheric Data.ii

Table of Smoothed Observed Zurich Sunspot Numbers . iii

World-Wide Sources of Ionospheric Data . iv

Tables of Ionospheric Data . 1

Graphs of Ionospheric Data.26

Index of Tables and Graphs of Ionospheric

Data in CRPL-F241 (Part A) 51

Page 4: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

ii

IONOSPHERIC DATA

The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution of ionospheric and related geophysical data. Part A, "Ionospheric Data," and Part B, "Solar-Geophysical Data," of the CRPL-F series present a variety of data in convenient form for use in research in radio propa¬ gation and the ionosphere and in other geophysical problems.

The current form of the tables of ionospheric data provides the monthly medians and, in addition, the number of values enter¬ ing into the median determination (count) for all ionospheric characteristics listed. Also, when available, the upper and lower quartile values indicated by UQ and LQ in the tables, are listed for foF2, h'F2, h'F, and M(3000)F2. Quartile values are not listed for the other characteristics because of space limita¬ tions. The tables are prepared by IBM machine methods.

Beginning with CRPL-F221, Part A, "Ionospheric Data," the hourly median values for the graphs of critical frequencies and M(3000)F2 were plotted by machine methods instead of manually, as in earlier issues. Graphs of critical frequencies and M(3000)F2 will continue to appear. Graphs of percentage of time of occurrence for fEs and virtual heights of the regular iono¬ spheric layers are no longer included. Data on percentage of time of occurrence of fEs above 3, 5, and 7 Me are available from the CRPL and the IGY World Data Center for Airglow and Ionosphere.

For many years, the tables of ionospheric data appearing in the F series, Part A, listed values of medians recomputed at CRPL. While this practice enforced a certain uniformity, it was subject to some valid criticism for tampering with the original data. The tables and graphs now show the ionospheric data as they are provided by the originating laboratory. Responsibility for the accuracy and reliability of the data rests entirely with the originator.

Medians of data for the U.S. stations are computed in accord¬ ance with the recommendations of the World-Wide Soundings Committee. Data will appear in the F series, Part A, only when the complete daily-hourly tabulations have been received by the CRPL or the IGY World Data Center A for Airglow and Ionosphere.

Page 5: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

Ill

Information on symbols, terminology, and conventions may be found in the "URSI Handbook of Ionogram Interpretation and Reduction, of the World-Wide Soundings Committee," edited by W. R. Piggott and K. Rawer (Elsevir, 1961), which supersedes previous documents. A list of symbols is available from CRPL on request.

The following table contains the latest available information on smoothed observed Zurich sunspot numbers, beginning with the minimum of April 1954. Final numbers are listed through June 1963, the succeeding values being based on provisional data.

Smoothed Observed Zurich Sunspot Number

Month Jan. Feb . Mar. Apr. May Jun. Jul. Aug. Sep. Oct . Nov. Dec .

1954 3 4 4 5 7 8 8 10 12 1955 14 16 19 23 29 35 40 46 55 64 73 81 1956 89 98 109 119 127 137 146 150 151 156 160 164 1957 170 172 174 181 186 188 191 194 197 200 201 200 1958 199 201 201 197 191 187 185 185 184 182 181 180 1959 179 177 174 169 165 161 156 151 146 141 137 132 1960 129 125 122 120 117 114 109 102 98 93 88 84 1961 80 75 69 64 60 56 53 52 52 51 50 49 1962 45 42 40 39 39 38 37 35 33 31 30 30 1963 29 30 30 29 29 28 28 27 27 26 23 21 1964 19 17

Units of Ionospheric Data Tables

foF2, foEs - - - Tenths of a megacycle foFl, foE - - - Hundredths of a megacycle h'F2, h'F, h'E - Kilometers M(3000)F2 - - - Hundredths

NOTE: Occasionally, when the median falls between two of the observed values, the median is carried an extra decimal place beyond these units. Those cases are easily identifiable by the extra digit appearing to the right of the number, in a column usually left blank.

MED - Median CNT - Count UQ - Upper Quartile LQ - Lower Quartile

Page 6: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

IV WORLD-WIDE SOURCES OF IONOSPHERIC DATA

THE IONOSPHERIC DATA GIVEN IN TABLES 1 TO 100 AND FIGURES 1 TO 100 WERE ASSEMBLED BY THE CENTRAL RADIO PROPAGATION LABORATORY FOR ANALYSIS? CORRELATION AND DISTRIBUTION. THE FOLLOWING ARE THE SOURCES OF THE DATA IN THIS ISSUE.

BELGIAN ROYAL METEOROLOGICAL INSTITUTE. DOURBES, BELGIUM

BRITISH DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH, RADIO RESEARCH BOARD.

SINGAPORE, MALAYASIA SLOUGH, ENGLAND

DEFENCE RESEARCH BOARD, CANADA. CHURCHILL, CANADA OTTAWA, CANADA RESOLUTE BAY, CANADA ST. JOHNS, NEWFOUNDLAND KENORA, CANADA

RADIO WAVE RESEARCH LABORATORIES, DIRECTORATE GENERAL OF TELECOMMUNICATIONS, MINISTRY OF COMMUNICATIONS, TAIPEI, HSIAN, TAIWAN, REPUBLIC OF CHINA,

TAIPEI (TAIWAN), CHINA

INSTITUTO GEOFISICO DE LOS ANDES COLOMBIANOS. BOGOTA, COLOMBIA

CENTRAL AFRICAN INSTITUTE FOR SCIENTIFIC RESEARCH. LWIRO, CONGO

DANISH NATIONAL COMMITTEE OF. URSI. NARSSARSSUAQ, GREENLAND

GENERAL DIRECTION OF POSTS AND TELEGRAPHS, HELSINKI, FINLAND. NURMI JARV I , FINLAND

THE FINNISH ACADEMY OF SCIENCES AND LETTERS. SODANKYLA, FINLAND

IONOSPHERE INSTITUTE, NATIONAL OBSERVATORY OF ATHENS. ATHENS (SCARAMANGA), GREECE

ICELANDIC POST AND TELEGRAPH ADMINISTRATION. REYKJAVIK, ICELAND

INDIAN COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH, RADIO RESEARCH COMMITTEE, NEW DELHI, INDIA.

KODAIKANAL, INDIA (INDIA METEOROLOGICAL DEPARTMENT)

NATIONAL INSTITUTE OF GEOPHYSICS, CITY UNIVERSITY, ROME, ITALY. ROME, ITALY

Page 7: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

V

MINISTRY OF POSTS AND TELECOMMUNICATIONS* RADIO RESEARCH LABORATORIES, TOKYO* JAPAN.

AKITA, JAPAN KOKUBUNJI, TOKYO, JAPAN WAKKANAI * JAPAN YAMAGAWA, JAPAN

CHRISTCHURCH GEOPHYSICAL OBSERVATORY, NEW ZEALAND DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH.

GODLEY HEAD (CHRISTCHURCH), N.Z.

NORWEGIAN DEFENCE RESEARCH ESTABLISHMENT,

KJELLER PER LILLESTROM, NORWAY. T ROM SO, NORWAY

MANILA OBSERVATORY* PHILIPPINES. MANILA, LUZON

INSTITUTE OF TELECOMMUNICATION, WARSAW, POLAND. WARSAW (MIEDZESZYN), POLAND.

RESEARCH INSTITUTE OE NATIONAL DEFENCE, STOCKHOLM, SWEDEN.

KIRUNA, SWEDEN LYCKSELE, SWEDEN UPPSALA, SWEDEN

ROYAL BOARD OF SWEDISH TELEGRAPHS, RADIO DEPARTMENT, STOCKHOLM, SWEDEN.

LIJLEA, SWEDEN

UNITED STATES ARMY SIGNAL CORPS., UNITED STATES OF AMERICA.

ADAK, ALASKA BANGKOK, THAILAND

FT. MONMOUTH, NEW JERSEY- GRAND BAHAMA I. OKINAWA I.

THULE, GREENLAND WHITE SANDS, NEW MEXICO

NATIONAL BUREAU OF STANDARDS, UNITED STATES OF AMERICA.

(CENTRAL RADIO PROPAGATION LABORATORY). ANCHORAGE, ALASKA BARROW, ALASKA BOULDER, COLORADO byrd station, Antarctica

FT. BELVOIR, VIRGINIA HUANCAYO, PERU (INSTITUTO GEOFISICO DEL PERU)

MAUI, HAWAII TALARA, PERU (INSTITUTO GEOFISICO DEL PERU)

Page 8: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution
Page 9: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

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Page 10: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

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Page 11: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

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Page 16: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

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Page 17: nvlpubs.nist.gov · ii IONOSPHERIC DATA The CRPL-F series bulletins are issued as part of the responsibility of the Central Radio Propagation Laboratory for the exchange and distribution

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5 RaSR 2-88 asas as 5 2388 2 = 82 SS

I 8 RRRR 3833 5-88 SR

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IB33 IB33 IB33 IB33 IB IB IB IB IB33 IB35 IB33 IB33 IB IB Is IB

3 21 e | _ J5

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ap

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27

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IB33 IB33 IB33 IB33 IB IB IB IB IB33 IB33 IB 3 3 IS33 2J

IB IB IB IB

1

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£ * '•c 2 ° £ £ £ £

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24

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26 GRAPHS OF IONOSPHERIC DATA

Fig I. BOULDER,COLORADO

40 0° N , 105 3° W MAY 1964

Fig 3 BOULDER,COLORADO 40 0° N , 105 3° W APRIL 1964

75"W

Fig. 4 FT. BELVOIR .VIRGINIA

38 7 ° N , 77 l°W_APRIL 1964

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27

Fig 5 THULE , GREENLAND

76 4° N , 68.3° W MARCH 1964

Fig 6 BARROW, ALASKA

71 3° N, 156.8° W MARCH 1964

Fig. 7 REYKJAVIK , ICELAND

64 1° N , 21 8° W MARCH 1964

06 08 10 12 18 16 20 22 00

<of2 f0F,

«—x—x f0 E o • ■ ■ 0 * ■ • <

f„ Es

I-INTERPOLATED VflLuFI

r

00 02 04 06 10 12 14 16

TIME 150° W

20 22 00

Fig 8 ANCHORAGE .ALASKA

61 2°N , 149 9° W MARCH 1964

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28

Fig 9 ADAK , ALASKA

51 9° N, 176.6° W MARCH 1964

Fig. 10 FT MONMOUTH, NEW JERSEY

40 4°N , 74 l°W_MARCH 1964

ios'w

Fig II BOULDER , COLORADO

40.0° N , 105 3° W MARCH 1964

Fig 12 FT BELVOIR .VIRGINIA

38 7° N , 77 1° W MARCH 1964

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29

75°W

Fig 14 GRAND BAHAMA I.

26 6 °N . 78.2° W_MARCH 1964

150° W

Fig, 15 OKINAWA I.

26 3°N , 1278° E MARCH 1964

Fig 16 MAUI , HAWAII

20 8°N , 156.5° W MARCH 1964

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30

Fig. 17 BANGKOK , THAILAND

_13.7° N , 100 6° E_MARCH 1964

7 5° W

Fig 18 HUANCAYO, PERU

12 0°S, 75 3° W MARCH 1964

75°W I50°W

Fig 19 THULE, GREENLAND

76 4°N , 68.3° W FEBRUARY 1964 Fig 20 BARROW, ALASKA

71.3° N , 156 8° W FEBRUARY 1964

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31

30°E

Fig 21 SODANKYLA , FINLAND

67.4° N, 26 6° E FEBRUARY 1964

I5"E

Fig 22 LULEA , SWEDEN

65 6° N , 22 I° E FEBRUARY 1964

Fig 23. REYKJAVIK , ICELAND

64 I°N , 21,8° W FEBRUARY 1964

Fig. 24 NARSSARSSUAO , GREENLAND

612° N , 45 4° W FEBRUARY 1964

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32

00 02 04 06 08 10 12 14 16 20 22 00,

foFz »—<—«

f0 F,

f0E o o -i

f„E,

1-INTERPOLATED VALUE

/

02 04 06 08

TIME 150° W

Fig 25, ANCHORAGE , ALASKA

61 2° N , 149 9° W FEBRUARY 1964

rn00 02 04 06 08 10 12 14 16 18 20 22 00rA ^ i 1 i t it i 1 i1 i 1 i i 1 i 1 i ^

CM -

5 40 - - 4.0

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[-INTERPOLATED VALUE —1 .</> '

z

2 15.0 - 150

z

Z> o - -

£ ioo - 10.0

, - <

P cc C_J

50 1

\ \

/

i /

5.0

/ \.

+ +_-■' ♦ J _

i L lil i 1 i 1 U i.tii, w00 02 04 06 08 10 12 14 16 18 20 22 00w

TIME 30° E

Fig 26. NURMIJARVI , FINLAND

60.5° N, 24 6° E FEBRUARY 1964

I5°E

Fig, 27 WARSAW ( MIEDZESZYN ) .POLAND

52. 2° N , 21.2 ° E FEBRUARY 1964

Fig 28 ADAK . ALASKA

51.9° N , 176 6° W FEBRUARY 1964

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33

0 0°

Fig 29 SLOUGH , ENGLAND

_515° N , 0 6° W_FEBRUARY 1964

0 0"

Fig. 30. DOURBES, BELGIUM

50.1° N , 4 6 ° E_FEBRUARY 1964

I5”E

Fig 31 ROME , ITALY

41.8° N , 12.5° E FEBRUARY 1964

Fig. 32. FT MONMOUTH , NEW JERSEY

40 4°N , 74 1° W FEBRUARY 1964

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34

75"W

Fig. 34. GRAND BAHAMA I.

26,6 ° N , 78 2° W_FEBRUARY 1964

TIME I35°E

TIME I20°E

Fig. 35 OKINAWA I

26.3° N , 127 8° E FEBRUARY 1964

Fig 36 TAIPEI (TAIWAN), CHINA

25 0°N , 121.5°E FEBRUARY 1964

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35

I50°W

Fig. 37, MAUI, HAWAII

20,8° N , 156.5° W_FEBRUARY 1964

Fig. 38. MANILA , LUZON

14 7° N , 121 1° E FEBRUARY 1964

100“ E

Fig. 39. BANGKOK , THAILAND

13.7° N , 100.6°E_FEBRUARY 1964

Fig 40. LWIRO , CONGO

2 2° S , 28 8° E_FEBRUARY 1964

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36

Fig. 41 HUANCAYO, PERU

12 0° S, 75.3° W FEBRUARY 1964

Fig 43 THULE , GREENLAND

76.4° N , 68.3° W JANUARY 1964

Fig 44 RESOLUTE BAY , CANADA

74 7°N , 94,9° W JANUARY 1964

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37

150° W

Fig 45. BARROW, ALASKA

71 3°N , 156 8° W_JANUARY 1964

15-E

Fig.46. TROMSO, NORWAY

69.7° N , 19.0° E_JANUARY 1964

I5°E

Fig 47, KIRUNA , SWEDEN

67,8° N, 20 4°E _JANUARY 1964

30" E

Fig 48. SODANKYLA , FINLAND

67 4° N, 26 6° E_JANUARY 1964

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38

I5°E

Fig 49 LULEA, SWEDEN

65.6 ° N , 22.1° E_JANUARY 1964

I5°E

Fig. 50 LYCKSELE , SWEDEN

64 7° N , 18 8° E_JANUARY 1964

5.0

(\J

t 4.0 o o o !2 3.0 2

2.0

00 02 04 0 6 08 10 12 14 16 20 22 00 ~1—T

f0F2 x—x-x

foF. * * ‘

f0E o • • • o • • •

fn Fc —

I-I NT E RPOLATE'D VALUE ~1

\.t/+

I i I i 1 i 1

.;xr

! : !

00 02 04 06 10 12

TIME 30"E

20 22 00

Fig 51 NURMIJARVI , FINLAND

60.5°N , 24 6°E JANUARY 1964

Fig. 52. UPPSALA, SWEDEN

59 8°N , 176° E JANUARY 1964

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39

90° W

Fig, 53 CHURCHILL , CANADA

58,8° N , 94 2°W JANUARY 1964

I5°E

Fig. 54 WARSAW (MIEDZESZYN) , POLAND

52.2° N , 21.2° E JANUARY 1964

oo°

Fig, 55. SLOUGH .ENGLAND

51.5° N , 0.6° W_JANUARY 1964

oo°

Fig 56 DOURBES, BELGIUM

50 I°N , 4 6° E_JANUARY 1964

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40

90° W

Fig 57 KENORA , CANADA

49 8° N , 94.4° W_JANUARY 1964

60°W

Fig. 58 ST. JOHNS, NEWFOUNDLAND

_47.6° N , 52.7° W_JANUARY 1964

I35°E

Fig. 59. WAKKANAI , JAPAN

45.4° N , 141 7°E JANUARY 1964

75”W

Fig.60. OTTAWA, CANADA

45.4°N , 75 9° W JANUARY 1964

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41

I5*E

Fig 61 ROME , ITALY

41 8° N , 12 5° E JANUARY 1964

TIME 135°E

Fig 63. AKITA, JAPAN

39.7° N , 140 l°E_JANUARY 1964

75”W

Fig, 62 FT MONMOUTH , NEW JERSEY

40.4 °N , 74 l°W JANUARY 1964

30°E

Fig. 64 ATHENS , GREECE

38 0°N , 23.6° E_JANUARY 1964

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42

Fig 67 YAMAGAWA , JAPAN 31.2° N , 130.6° E_JANUARY 1964

75°W

Fig 68 GRAND BAHAMA I 26.6 °N , 78.2 ° W_JANUARY 1964

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43

I20°E

Fig 69, TAIPEI (TAI WAN), CH IN A 25 0° N , 121.5° E JANUARY 1964

I20°E

Fig 70 MANILA , LUZON

14.7° N , 121.1° E JANUARY 1964

75"E

Fig. 71 BANGKOK , THAILAND

13.7° N , 100 6° E JANUARY 1964 Fig 72 KODAIKANAL , INDIA

10. 2° N ,77 5°E JANUARY 1964

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44

Fig 73 SINGAPORE, MALAYSIA

_1.3° N , 103 8°E_JANUARY 1964

oo°

Fig 74 LWIRO, CONGO

2.2° S , 28 8°E_JANUARY 1964

75°W

Fig 75 HUANCAYO, PERU

12.0°S, 75 3° W JANUARY 1964

I80°E

Fig 76 GODLEY HEAD ( CHRISTCHURCH ), N Z

_43.6° S , 172 8° E_JANUARY 1964

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45

45°W 105° W

Fig 77 NARSSARSSUAQ , GREENLAND

6I.2°N , 45.4° W DECEMBER 1963

Fig 78 WHITE SANDS , NEW MEXICO

32.3° N , 106 5° W DECEMBER 1963

75° W

Fig, 79 BOGOTA , COLOMBIA

_4.5° N , 74.2° W_DECEMBER 1963

75”W

Fig 80. HUANCAYO, PERU

12.0° S, 75 3° W DECEMBER 1963

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46

Fig 81 BOGOTA , COLOMBIA

_4,5° N , 74.2° W_NOVEMBER 1963

75°W

Fig 83 HUANCAYO , PERU

12.0° S, 75.3° W_NOVEMBER 1963

75°W

Fig. 82. TALAR A , PERU

4.6° S , 81.3° W_NOVEMBER 1963

I05"W

Fig 84 BOULDER, COLORADO

40.0°N , 105.3° W_OCTOBER 1963

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47

75'W

Fig 87 BOGOTA , COLOMBIA

4.5° N, 74 2° W SEPTEMBER 1963

Fig.88 BOGOTA , COLOMBIA

4.5° N , 74 2° W_AUGUST 1963

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48

7 5“W

Fig 89 TALARA , PERU

4 6°S , 813° W JULY 1963

TIME

75“ W

Fig 90. BOGOTA, COLOMBIA

_4 5° N , 74.2 ° W_FEBRUARY 1963

75“ W

Fig 91 BOGOTA , COLUMBIA

4 5°N, 74 2°W_JANUARY 196 3

75" W

Fig. 92. BOGOTA, COLOMBIA

4.5 ° N , 74.2° W_DECEMBER 1962

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49

Fig. 93. BOGOTA , COLOMBIA

4.5° N , 74.2° W_NOVEMBER 1962

I20"W

Fig 94 BYRD STATION , ANTARCTIC

80 0° S , 120 0° W_NOVEMBER 1962

Fig. 95 BOGOTA .COLOMBIA

4 5° N , 74 2° W OCTOBER 1962

20 22 00,

f0F2 x_x—»

f„F, '0E

Ft

I-INTERPOt ATF.O VALUE

0 —1—L 00 02 04 06 10 12

TIME I20°W

Fig 96 BYRD STATION , ANTARCTIC

80.0° S, 120 0° W OCTOBER 1962

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50

I20”W

Fig. 97 BYRD STATION , ANTARCTIC

80.0°S, 120.0° W SEPTEMBER 1962

TIME 120°W

Fig 98 BYRD STATION, ANTARCTIC

80.0° S, I20.0°W AUGUST 1962

0 02 M 06 08 10 12 14 16 18 20 22 00rn

(M

| 1 | ' |"T | 1 | ' | 1

F? « - 4.0 o _

? 5.0 _ 3.0

20 2.0

f0 F2 «—«—< f0E 8—0—« fQ F| A A--A f0 Es ♦—•+—• +

20.0 -1- 20.0

in 1-INTERPOLATED VALUE 1

2 15.0 - 15.0

z

3 O -

U ioo 100

- < <_> h- a: o

5.0 / + +\ 5.0

+ x + - +'"'+

+\

<1,11 1 , 1 i l , 1 i 1 i 1 i .. 0 02 04 06 08 10 12 14 16 18 20 22 00u

TIME I20°W

Fig 99. BYRD STATION, ANTARCTIC

80.0° S, 120.0°W JULY 1962

TIME I20°W

Fig 100. BYRD STATION, ANTARCTIC

80 0° S , 120.0° W JUNE 1962

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51

INDEX OF IONOSPHERIC DATA IN CRPL F241

ADAK, ALASKA

AKITA, JAPAN

ANCHORAGE, ALASKA

ATHENS, GREECE

BANGKOK, THAILAND

BARROW, ALASKA

BOGOTA, COLOMBIA

BOULDER, COLORADO

BYRD STATION, ANTARCTICA

PAGE TABLE FIG

1964 FEB. 7 32 1964 MAR. 3 28

1964 JAN. 16 41

1964 FEB. 7 32 1964 MAR • 2 27

1964 JAN. 16 41

1964 JAN. 18 43 1964 FEB. 10 35 1964 MAR. 5 30

1964 JAN. 12 37 1964 FEB. 5 30 1964 MAR, 2 27

1962 OCT . 24 49 1962 NOV. 24 49 1962 DEC. 23 48 1963 JAN. 23 48 1963 FEB. 23 48 1963 AUG. 22 47

1963 SEPT. 22 4 7 1963 OCT . 22 47 1963 NOV. 21 46 1963 DEC. 20 45

1963 SEPT . 22 47 1963 OCT. 21 46 1964 MAR. 3 28 1964 APR. 1 26 1964 MAY 1 26

1962 JUNE 25 50 1962 JULY 25 50 1962 AUG. 25 50 1962 SEPT. 25 50 1962 OCT . 24 49 1962 NOV. 24 49

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52

INDEX OF IONOSPHERIC DATA IN CRPL F24

CHURCHILL, CANADA

DOURBES, BELGIUM

FT. BELVOIR, VIRGINIA

FT. MONMOUTH, NEW JERSEY

GODLEY HEAD (CHRISTCHURCH), N.Z.

GRAND BAHAMA I.

HUANCAYO, PERU

KENORA, CANADA

KIRUNA, SWEDEN

KODAIKANAL, INDIA

KOKUBUNJI, TOKYO, JAPAN

LULEA, SWEDEN

PAGE TABLE FIGURE

1964 JAN. 14 39

1964 JAN. 14 39 1964 FEB. 8 33

1964 MAR. 3 28 1964 APR. 1 26 1964 MAY 1 26

1964 JAN. 16 41 1964 FEB. 8 33 1964 MAR. 3 28

1964 JAN. 19 44 1964 FEB. 11 36

1964 JAN. 17 42 1964 FEB. 9 34 1964 MAR. 4 29

1963 NOV. 21 46 1963 DEC. 20 45 1964 JAN. 19 44 1964 FEB. 11 36 1964 MAR. 5 30

1964 JAN. 15 40

1964 JAN. 12 37

1964 JAN. 18 43

1964 JAN. 17 42

1964 JAN. 13 38 1964 FEB. 6 31

1964 JAN. 19 44 LWIRO, CONGO

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53

INDEX OF IONOSPHERIC DATA I N CRPL F241

PAGE TABLE FIGUR

LWIRO* CONGO 1964 FEB. 10 35

LYCKSELE » SWEDEN 1964 JAN. 13 38

MANILA, LUZON 1964 JAN. 18 43 1964 FEB. 10 35

MAUI, HAWAII 1964 FEB. 10 35 1964 MAR, 4 29

NARSSARSSUAQ, GREENLAND 1963 DEC. 20 45 1964 FEB. 6 3 1

NURMIJARVI, FINLAND 1964 JAN. 13 38 1964 FEB. 7 32

OKINAWA I. 1964 FEB. 9 34 1964 MAR. 4 29

OTTAWA, CANADA 1964 JAN. 15 40

RESOLUTE BAY, CANADA 1964 JAN. 11 36

REYKJAVIK, ICELAND 1964 FEB. 6 31 1964 MAR. 2 27

ROME, ITALY 1964 JAN. 16 41 1964 FEB. 8 33

SINGAPORE, MALAYSIA 1964 JAN. 19 44

SLOUGH, ENGLAND 1964 JAN. 14 39 1964 FEB. 8 33

SODANKYLA, FINLAND 1964 JAN. 12 37 1964 FEB. 6 3 1

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54

INDEX OF IONOSPHERIC DATA IN CRPL F241

ST. JOHNS. NEWFOUNDLAND

TAIPEI (TAIWAN), CHINA

TALARA, PERU

THULE. GREENLAND

TROMSO, NORWAY

UPPSALA, SWEDEN

WAKKANAI, JAPAN

WARSAW (MIEDZESZYN) , POLAND

WHITE SANDS, NEW MEXICO

PAGE TABLE FIGURE

1964 JAN. 15 40

1964 JAN. 18 43 1964 FEB. 9 34

1963 JULY 23 48 1963 NOV. 21 46

1964 JAN. 11 36 1964 EEB • 5 30 1964 MAR. 2 27

1964 JAN. 12 37

1964 JAN. 13 38

1964 JAN. 15 40

1964 JAN. 14 39 1964 FEB. 7 32

1963 DEC. 20 45 1964 JAN. 17 42 1964 FEB. 9 34 1964 MAR. 4 29

1964 JAN. 17 42 YAMAGAWA, JAPAN

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CRPL REPORTS

(A detailed list of CRPL publications is available from the Central Radio Propagation Laboratory on request.)

Catalog of Data. A catalog of records and data on file at the U.S. IGY World

Data Center A for Airglow and Ionosphere, Boulder Laboratories, National Bureau of Standards, Boulder, Colorado, which includes a fee schedule to cover the cost of supplying copies, is available upon request.

CRPL-F (Part A), "Ionospheric Data." CRPL-F (Part B), "Solar Geophysical Data."

These monthly bulletins have limited distribution and are sent, in general, only to those individuals and scientific organizations that collaborate in the exchange of ionospheric, solar, geomagnetic, or other radio propagation data of interest to the CRPL. Others may pur¬ chase copies of the same data from the U.S. IGY World Data Center A for Airglow and Ionosphere, National Bureau of Standards, Boulder, Colorado.

"Ionospheric Predictions." This series of publications is issued monthly, three months

in advance, as an aid in determining the best sky-wave frequencies for high frequency communications over any transmission path, at any time of day for average conditions for the month.

For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington 25, D.C. Price 15 cents. Annual subscrip¬ tion (12 issues) $1.50 (50 cents additional for foreign mailing). (NOTE: Tested sets of punched cards of the predicted numerical

coefficients of numerical maps of the Ionospheric Predictions, for use with electronic computers, may be purchased by arrangement with the Prediction Services Section, CRPL, Boulder Laboratories, Boulder, Colorado.)

National Bureau of Standards Handbook 90, "Handbook for CRPL Ionospheric Predictions Based on Numerical Methods of Mapping." Price 40 cents.

National Bureau of Standards Circular 462, "Ionospheric Radio Propagation." Price $1.25.

NBS Handbook 90 and NBS Circular 462 for sale by the Super¬ intendent of Documents, U.S. Government Printing Office, Washington 25, D. C.

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