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I3LGP > PROPAG 18.06.97 04:41l 142 Lines 5446 Bytes #-10618 (0) @ WW
BID : 59827_KA6EYH
Read: GUEST
Subj: HF PROPAGATION JUNE 11
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Sent: 970611/0758Z @:KA6EYH.#NCA.CA.USA.NOAM #:59827 [Pacifica CA] FBB7.00c
From: I3LGP@KA6EYH.#NCA.CA.USA.NOAM
To : PROPAG@USA
Bulletin downloaded via anonymous FTP from ftp.sel.noaa.gov
(132.163.224.101)
*--<< I3LGP - University of Padova, Italy >>--*
73 de Giuliano
AX25 : I3LGP@IW3GRX.IVEN.ITA.EU
E-mail: artico@math.unipd.it
WWW : http://www.math.unipd.it/~artico
Prepared jointly by the U.S. Air Force
and the U.S. Dept. of Commerce, NOAA, Space Environment Center
SUBJ: HF RADIO PROPAGATION REPORT
JOINT USAF/NOAA BULLETIN PREPARED BY 55SWXS, FALCON AFB, CO.
PRIMARY HF RADIO PROPAGATION REPORT ISSUED AT 11/0503Z JUN 97.
PART I. SUMMARY 11/0000Z TO 11/0600Z JUN 97.
FORECAST 11/0600Z TO 11/1200Z JUN 97.
QUADRANT
I II III IV
0 TO 90W 90W TO 180 180 TO 90E 90E TO 0
REGION POLAR N5 N5 N5 N5
AURORAL N4 N5 N5 N4
MIDDLE N5 N6 N6 N5
LOW N5 N6 N6 N5
EQUATORIAL N5 N6 N6 N5
PART II. GENERAL DESCRIPTION OF HF RADIO PROPAGATION CONDITIONS
OBSERVED DURING THE 24 HOUR PERIOD ENDING 10/2400Z, AND FORECAST
CONDITIONS FOR THE NEXT 24 HOURS.
A. OBSERVED CONDITIONS: EQUATORIAL STATIONS HAVE REPORTED NOISE
ON ALL FREQUENCIES THROUGHOUT THE PERIOD BUT ARE NOW BEGINING TO
SHOW SLIGHT IMPROVEMENT AS PROPAGATION RETURNS TO NORMAL.
B. FORECAST CONDITIONS: EXPECT CONDITIONS TO RETURN TO NORMAL.
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 10/2400Z JUN 97. NONE
PROBABILITY FOR THE NEXT 24 HOURS: NIL
PART IV. OBSERVED/FORECAST 10.7 CM FLUX AND K/AP.
THE OBSERVED 10.7 CM FLUX FOR 10 JUN 97 WAS 072.
THE FORECAST 10.7 CM FLUX FOR 11, 12, AND 13 JUN 97
ARE 073, 074, AND 074.
THE OBSERVED K/AP VALUE FOR 10 JUN 97 WAS 02/06.
THE FORECAST K/AP VALUES FOR 11, 12, AND 13 JUN 97
ARE 02/08, 02/08, AND 01/05.
SATELLITE X-RAY BACKGROUND: A2.3 (2.3 E MINUS 05 ERGS/CM SQ/SEC).
THE EFFECTIVE SUNSPOT NUMBER FOR 10 JUN 97 WAS 18.4
PART V. REMARKS
ISSUED BY THE 55TH SPACE WEATHER SQUADRON, FALCON AFB, CO.
55SWXS HAS A QUICK TURN-AROUND CAPABILITY TO SUPPORT REQUESTS FROM
HIGH FREQUENCY (HF) COMMUNICATORS FOR SPECIFICATIONS AND/OR
FORECASTS OF MAXIMUM USABLE FREQUENCY AND FREQUENCY OF OPTIMUM
TRANSMISSION. IN ADDITION, WE CAN EVALUATE ANOMALOUS ENVIRONMENTAL
CONDITIONS THAT CAN AFFECT DOD ASSETS OPERATING IN AND THROUGH
THE SPACE ENVIRONMENT. FOR SUPPORT, CONTACT THE CREW COMMANDER AT
DSN 560-6313 OR COMMERCIAL (719) 567-6313. QUESTIONS CONCERNING
THE FORMAT OR CONTENT OF THE HFUS1/2 BULLETINS MAY BE DIRECTED
TO THE SPACE ENVIRONMENTAL FORECASTER AT DSN 560-6312 OR
COMMERCIAL (719) 567-6312.
99999
=============================================================================
:Product: 27 Day 10.7 cm. Solar Radio Flux Forecast SRFF.txt
:Issued: 1997 Jun 10 2107 UT
# Prepared by the U.S. Air Force.
# Retransmitted by the Dept. of Commerce, NOAA, Space Environment Center.
# Please send comments and suggestions to sec@sec.noaa.gov
#
#
# 27-Day 10.7 cm Solar Radio Flux Forecast
#-------------------------------------------------------------
27 DAY 10.7 CM SOLAR RADIO FLUX FORECAST PREPARED 10 JUN 97
THE FLUX ON 10 JUN 97 WAS 72. THE 90-DAY MEAN FLUX WAS 74.
10 CM SOLAR RADIO FLUX GRAPH
OBSERVED FLUX VERSUS TIME /L'LAST 27 DAYS/
MAY 14 18 23 28 2 7 9 JUN
. X . . . X . . . . X . . . . X . . . . X . . . . X . X .
86. . . . . . . . . . . . . . . . . . . . . . . . . . . . P10PCT
85. L
84.
83.
82. P P
81. L P
80. L L P P P
79. L P P P P P P P P
78. . . . . . . P P P . L . L . . . . . . . P . P P . . . MEAN
77. L L L L L
76. P L L
75. P B B B B B B L B B B L B B B L B B B
74. B B P L L B B B B L L
73. L P L L L L
72. P L
71.
70. . . . . . P . . . . . . . . . . . . . . . . . . . . . M10PCT
69. P
68.
. X . . . X . . . . X . . . . X . . . . X . . . . X . X .
JUN 11 15 20 25 30 5 7 JUL
PREDICTED FLUX VERSUS TIME /P'PREDICTION B'FBAR/
P20PCT' 94 P10PCT' 86 MEAN ' 78 M10PCT' 70 M20PCT' 62
27 DAYS
DATE FLUX F BAR AGO
11 JUN 72 74 73
12 JUN 73 74 80
13 JUN 74 74 73
14 JUN 75 74 74
15 JUN 76 74 74
16 JUN 70 74 79
17 JUN 78 74 85
18 JUN 78 74 81
19 JUN 78 74 76
20 JUN 79 75 77
21 JUN 81 75 78
22 JUN 82 75 80
23 JUN 82 75 78
24 JUN 80 75 77
25 JUN 80 75 76
26 JUN 79 75 75
27 JUN 80 75 73
28 JUN 79 75 77
29 JUN 79 75 77
30 JUN 79 75 75
1 JUL 78 75 77
2 JUL 79 75 74
3 JUL 78 75 74
4 JUL 78 75 75
5 JUL 79 75 73
6 JUL 79 75 73
99999
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