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CRPL-F198 PART B FOR OFFICIAL USE
ational Bureau Library, N.
MAR 9
of standards
W. Bldg
19GI
PsfefgflQQ hflnf, jl » yWUfi.
^Ken from £ , - nottote , .S A F r 9 ■ t i« ^ h . ' r~0, 5*1 /
*k*s*Q[y9
PART B
SOLAR - GEOPHYSICAL DATA
ISSUED FEBRUARY 1961
U. S. DEPARTMENT OF COMMERCE NATIONAL BUREAU OF STANDARDS
CENTRAL RADIO PROPAGATION LABORATORY BOULDER, COLORADO
CRPL-F 198
PART B
NATIONAL BUREAU OF STANDARDS CENTRAL RADIO PROPAGATION LABORATORY
BOULDER, COLORADO
Issued 28 Feb. 1961
SOLAR - GEOPHYSICAL DATA
CONTENTS
I DAILY SOLAR INDICES
(a) Relative Sunspot Numbers and 2800 Me Solar Flux, December 1960 - January 1961
(b) Graph of Sunspot Cycle
II SOLAR CENTERS OF ACTIVITY
(a) Calcium Plage and Sunspot Regions - January 1961 (b) Provisional Coronal Line Emission Indices - January 1961
III SOLAR FLARES
(a-b) Optical Observations - January 1961 (c) Flare Patrol Observations - January 1961 (d) Subflares - December 1960 (e-h) Optical Observations - October 1960 (i) Flare Patrol Observations - October 1960 (j) Ionospheric Effects (SWF-SEA-SCNA-Bursts ) - December 1960
IV SOLAR RADIO WAVES
(a) 2800 Me - Outstanding Occurrences (Ottawa) January 1961 (b) 169 Me - Outstanding Occurrences (Nanpay) January 1961 (c-d) 108 Me - Outstanding Occurrences (Boulder) January 1961 (e-i) 25-580 Me - Spectrum Observations (Ft. Davis) April -
June 1960 (j) 450-1000 Me - Spectrum Observations (Owens Valley)
December 1960 - January 1961
V COSMIC RAY INDICES
(a) Climax Neutron Monitor - December 1960 (b) Deep River Neutron Monitor - December 1960
VI GEOMAGNETIC ACTIVITY INDICES
(a) C, Kp, Ap, and Selected Quiet and Disturbed Days, December 1960
(b) Chart of Kp by Solar Rotations - 1960
VII RADIO PROPAGATION QUALITY INDICES
(a) CRPL Quality Figures and Forecasts - North Atlantic and North Pacific - December 1960
(b) Graphs Comparing Forecast and Observed Quality - North Atlantic and North Pacific - December 1960
(c-d) Graphs of Useful Frequency Ranges - December 1960
VIII ALERT PERIODS AND SPECIAL WORLD INTERVALS
(a) Alerts and SWI - January 1961
The descriptive text was published separately, November i960.
Ia DAILY SOLAR INDICES
Jan. 1961
Zurich Provisional Relative Sunspot
Numbers
RZ
Daily Values Solar Flux at 2800 Me, Ottawa, Canada
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PLANETARY MAGNETIC
THREE - HOUR -RANGE INDICES
Kp 1960
(and preliminary indices to 1961 January 161
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CRPL RADIO PROPAGATION QUALITY FIGURES AND FORECASTS
NORTH ATLANTIC
VII b
DECEMBER I960
— Short-term forecast I Range of reports
° Quality figure
DAY
ACTUAL
COMPARISON (SEE TEXT)
0 10 20 31
NORTH PACIFIC
ACTUAL
COMPARISON (SEE TEXT)
DISTURBED QUIET
20 0 10 31
VII c USEFUL FREQUENCY RANGES - NORTH ATLANTIC PATH