[Ips-dhfpr] IPS Daily HF Prop Report - 10 December 09
rwc
rwc at ips.gov.au
Fri Dec 11 10:04:29 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 10/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (10 DECEMBER)
Date T index Conditions
10 Dec -37 Normal-poor
Flares: none.
MUFs:
Cocos Island Region:
Near predicted monthly values.
Niue Island Region:
Depressed by 40% during local day,
Depressed by 35% during local night.
Northern Australian Region:
Depressed by 30% during local day,
Depressed by 35% during local night.
Southern Australian and New Zealand Region:
Depressed by 20% 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 (11 DECEMBER - 13 DECEMBER)
Date T index Conditions MUFs
11 Dec -25 Normal-fair 15 to 30% below predicted monthly
values
12 Dec -25 Normal 10 to 20% below predicted monthly
values
13 Dec -20 Normal near predicted monthly values/depressed
10 to 20%
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 poor at times
with sporadic E observed at multiple stations, most notably during
the day at mid latitudes. Ionospheric support is expected to
continue to be depressed for the next three days due to continuing
weak solar activity, although there should be some gradual improvement
as solar active regions currently near the east limb rotate further
onto the visible disk. HF conditions are likely to be variable
with the possibility of further sporadic E degrading HF.
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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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