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File: 120596_aacng_04.txt
REFRACTIVE CONDITION: TRAP SFC TO 004
SUB 029 TO 030, 033 TO 038
TABUK 29 JAN 91/23Z
SFC.TO SFC RADAR: NORM RNGS AT ALL FREQS
SFC TO AIR RADAR: NORM RNGS AT ALL ALTS
AIR TO AIR RADAR: NORM RNGS AT ALL ALTS
SFC REFRACTIVITY: 292 M UNITS
REFRACTIVE CONDITION: SUPER 032 TO 041
5. (U) PART E: UPPER AIR SOUNDING FOR KQIY
TTAA 80012 KOIY 99014 11056 09002 00142 14462 17009 8SSO2 09260
27017 70088 0132S 26023 50571 143S2 26562 40737 24S74 26S93 30942
35563 27126 25066 44969 27620 20211 56970 27114 88999 77273 27631
41716
TTBB 8001/ KQIY 00014 11056 11007 14461 22986 14267 33935 13471
44933 13471 5589S 11067 66818 08859 77739 03056 88710 00035 99683
03310 11680 03S10 22679 03310 33677 02950 44670 02163 SS668 02166
66642 os374 7763 1 03 1 85 88624 03 1 87 99526 1 257s 1 1 48 5 1 538 1 224 79
15967 33477 16164 44459 18961 SS416 22377 66328 319SS 77312 33771
88295 36762 99195 58369 11173 62367
PPBB 80010 KOIY 90012 09002 20011 20S12 90346 21513 24013 27S19
90789 27519 27019 26521 91246 27031 26038 26044 920S/ 2606S 27093
93035 27123 27631 27620 943// 2762S;
(U) PART F: HFUS1 KGWC PROPOGATION BULLETIN
NFUS1 KGWC 300S12
JOINT USAF/NOAA BULLETIN PRERARED AT SPACE ENVIRONMENTAL SUPPORT
BRANCH AIR FORCE GLOBAL WEATHER CENTRAL.
PRIMARY HF RADIO PROPAGATION REPORT ISSUED AT 300510Z JAN 91.
RART I. SUMMARY 300000Z TO 300600Z JAN 91/
/ FORECAST 300600Z TO SO1200Z JAN 91.
QUADRANT
I II III IV
O TO 90W 90W TO 180 180 TO 90F 90E TO 0
REGION POLAR N4 N5 N5/P20 N5/P20
AURORA L N4/M20 NS/R30 NS/P30 N5/R30
MIDDLE NS N7/P30 N7 N7/PS5 -
LOW N8 N8/P25 N8 NB
EQUATORIAL N7 N8/M20 N8 N8
PART II. GFNERAL DESCRIPTION OF HF RADIO PROPAGATION CONDITIONS
OBSERVED DURING THE 24 HOUR PERIOD ENDING 29/2400Z AND FORECAST
CONDITIONS FOR THE NEXT 24 HOURS.
HF PROPAGATIONS CONDITIONS IN ALL SECTORS AND LATITUDES HAVE
BEEN NORMAL OVER THE PAST SIX HOURS. A LARGE SOLAR FLARE
OCCURRED ON 25 JAN 91 WHICH MAY RESULT IN DEGRADED HF
PROPAGATION CONDITIONS OVER THE NEXT 24 HOURS. HOWEVER THE
TIME PERIOD FOR MAJOR DEGRADATION TO OCCUR HAS ALREADY PASSED.
STATIONS IN THE POLAR AND AURORA L LATITUDES ARE MOST SUSCEPTIBLE
TO THE EFFECTS FROM SOLAR FLARES BUT ALL REGIONS CAN BE AFFECTED.
PART III. SUMMARY OF SOLAR FLARE INDUCED IONOSPHERIC DISTURBANCES
WHICH MAY HAVE CAUSED SHORT WAVE FADES IN THE SUNLIT HEMISPHERE .
DURING THE 24 HOUR PERIOD ENDING 29/2400Z JAN 91 . . .
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