[Ips-dhfpr] IPS Daily HF Prop Report - 25 September 11
rwc
rwc at ips.gov.au
Mon Sep 26 09:36:29 EST 2011
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 25/2330Z SEPTEMBER 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (25 SEPTEMBER)
Date T index Conditions
25 Sep 93 Normal
Flares Max Fadeout Freq. Sectors
M1.0 24/2359UT possible lower West Pacific
M4.5 0233UT possible lower E. Asia/Aust.
M7.4 0451UT probable lower E. Asia/Aust.
M1.3 0706UT possible lower Mid East/Indian
M3.1 0849UT possible lower Mid East/Indian
M1.5 0937UT possible lower Mid East/Indian
M3.7 1533UT possible lower South American/
Atlantic
M1.1 1619UT possible lower South American/
Atlantic
M2.2 1658UT possible lower South American/
Atlantic
MUFs:
Cocos Island Region:
Near predicted monthly values with enhancements to 30%
12-17 UT. No data 18-22 UT.
Niue Island Region:
Near predicted monthly values. Depressions to 25% 12-17UT.
Enhanced to 30% 05-10 and 19-22UT.
Northern Australian Region:
Near predicted monthly values with depressions to 30%
16-18UT at Darwin. Enhancements to 30% 12-15 UT at
Darwin and 00-01, 09-13, 21-23UT at Townsville.
Southern Australian and New Zealand Region:
Near predicted monthly values to 30% enhanced.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Weak ionosphere at high latitudes. Mostly near predicted
monthly values to 40% enhanced. Proton event in progress,
increased absorption observed.
PCA Event : 10Mev Proton/PCA Event Began 23 09 2011 2250UT and is in progress
Predicted Monthly T index for September: 62
2. FORECAST (26 SEPTEMBER - 28 SEPTEMBER)
Date T index Conditions MUFs
26 Sep 80 Normal-fair Near predicted monthly values
to 20% enhanced.
27 Sep 70 Normal Near predicted monthly values.
Possible occasional depressions
to 20%..
28 Sep 80 Normal Near predicted monthly values
to 20% enhanced.
COMMENT: IPS HF Communications Warning 43 was issued on 23 September
and is current for interval 24-26 September (SWFs) . With solar
activity increasing, there is the chance of sudden disruptions
to communications (short wave fade-outs).
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For an explanation of some of the terms in this report, go to
http://www.ips.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.
IPS Radio and Space Services email: asfc at ips.gov.au
PO Box 1386 WWW: http://www.ips.gov.au
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tel: +61 2 9213 8010 fax: +61 2 9213 8060
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