[Ips-dhfpr] IPS Daily HF Prop Report - 21 August 15 issued 2330 UT on 21 Aug 2015
Regional Warning Centre
rwc at ips.gov.au
Sat Aug 22 09:30:36 EST 2015
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 AUGUST 2015 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (21 AUGUST)
Date T index Conditions
21 Aug 34 Depressed
Flares Max Fadeout Freq. Sectors
M1.4 0948 UT possible lower Mid East/Indian
MUFs:
Cocos Island Region:
Near predicted monthly values during local day.
Depressed by 50% during local night.
Depressed by 25% after local dawn.
Niue Island Region:
Depressed by 25% during local day.
Depressed by 50% during local night.
Depressed by 25% after local dawn.
Northern Australian Region:
Depressed by 25% during local day.
Depressed by 30% during local night.
Southern Australian Region:
Depressed by 25% during local day.
Depressed by 25% during local night.
Depressed by 20% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 20% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Jul 60
Aug 80
Sep 78
2. FORECAST (22 AUGUST - 24 AUGUST)
Date T index Conditions MUFs
22 Aug 35 Depressed 10 to 30% below predicted monthly
values
23 Aug 40 Depressed 10 to 30% below predicted monthly
values
24 Aug 40 Depressed 10 to 25% below predicted monthly
values
COMMENT: IPS SWF HF Communications Warning 38 was issued on 21
August and is current for 21-22 Aug. Conditions for HF radio
wave propagation were depressed throughout the Australian region
during 21 August. The depressions were up to 50% at the low latitude
stations Cocos Island, Niue and Darwin, and up to 30% at the
Australian mid-latitude stations. The conditions are expected
to remain unusually depressed during coming days. However, they
are expected to trend back towards monthly predicted values during
the 4 week period approaching the September equinox.
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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.
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