[Ips-dhfpr] IPS Daily HF Prop Report - 21 November 07
rwc
rwc at ips.gov.au
Thu Nov 22 10:42:11 EST 2007
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 21/2330Z NOVEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (21 NOVEMBER)
Date T index Conditions
21 Nov -82 Poor-normal
Flares: none.
MUFs:
Equatorial PNG/Niue Region:
Depressed by 45% during local day,
Depressed by 45% during local night.
Depressed by 20% after local dawn.
Northern Australian Region:
Depressed by 45% during local day,
Depressed by 35% during local night.
Southern Australian and New Zealand Region:
Depressed by 40% during local day,
Depressed by 40% during local night.
Depressed by 25% after local dawn.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day with
periods of depressions and degradations.
PCA Event : No event.
Predicted Monthly T index for November: 11
2. FORECAST (22 NOVEMBER - 24 NOVEMBER)
Date T index Conditions MUFs
22 Nov -45 Normal-fair 15 to 30% below predicted monthly
values
23 Nov -40 Normal 15 to 30% below predicted monthly
values
24 Nov -30 Normal 10 to 20% below predicted monthly
values
COMMENT: IPS HF Communications Warning 32 was issued on
20 November and is current for interval 21-22 November.
Widespread depressions in MUFs continued across the
Australian/ NZ/SW-Pacific region due to lack of solar
ionisation. Minor to significant degradations in HF
conditions and depressions in MUFs may be expected across
Aus/NZ regions for the next two days. Some improvements
in conditions may be possible on 24 November as the currently
going on coronal hole effect is expected to be over by then.
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For an explanation of some of the terms in this report, goto
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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