[Ips-dhfpr] IPS Daily HF Prop Report - 09 December 09
rwc
rwc at ips.gov.au
Thu Dec 10 10:05:34 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 09/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (09 DECEMBER)
Date T index Conditions
09 Dec -39 Normal-fair
Flares: none.
MUFs:
Cocos Island Region:
Depressed by 15% during local day,
Depressed by 15% during local night.
Niue Island Region:
Depressed by 15% during local day,
Near predicted monthly values during local night.
Northern Australian Region:
Depressed by 25% during local day,
Depressed by 25% during local night.
Depressed by 20% after local dawn.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Depressed by 20% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Predicted Monthly T index for December: 1
2. FORECAST (10 DECEMBER - 12 DECEMBER)
Date T index Conditions MUFs
10 Dec -35 Normal-fair 15 to 30% below predicted monthly
values
11 Dec -30 Normal 15 to 30% below predicted monthly
values
12 Dec -25 Normal 10 to 20% below predicted monthly
values
COMMENT: IPS HF Communications Warning 9 was issued on 9 December
and is current for interval 10-12 December. MUFs were again consistently
depressed across the Australian region over the day, particularly
at mid-low latitudes (N.Aus). HF conditions were variable with
some sporadic E-layer observed at a number of stations, particularly
in the early evening. Ionospheric support is expected to continue
to be depressed for at least the next three days due to continuing
weak solar activity, although there should be some gradual improvement
as solar active regions currently on the east limb rotate further
onto the visible disk.
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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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