[Ips-dhfpr] SWS Daily HF Prop Report - 12 December 18 issued 2338 UT on 12 Dec 2018 [SEC=UNCLASSIFIED]
rwc
rwc at ips.gov.au
Thu Dec 13 10:38:35 EST 2018
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (12 DECEMBER)
Date T index Conditions
12 Dec -41 Normal
Flares: none.
MUFs:
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Near predicted monthly values during local day.
Depressed by 25% during local night.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 40% during local night.
Southern Australian Region:
Depressed by 20% during local day.
Depressed by 25% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 15% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Nov -32
Dec -8
Jan -9
2. FORECAST (13 DECEMBER - 15 DECEMBER)
Date T index Conditions MUFs
13 Dec -40 Normal Depressed 15 to 30%/near predicted
monthly values
14 Dec -40 Normal Depressed 15 to 30%/near predicted
monthly values
15 Dec -40 Normal Depressed 15 to 30%/near predicted
monthly values
COMMENT: SWS HF Communications Warning 25 was issued on 11 December
and is current for 12-13 Dec. On UT day 12 December, there were
minor to moderate MUF depressions across the Australian region
as compared to the monthly predicted levels, with some severe
MUF depressions during the local night in the Northern and Central
Australian regions. Sporadic E layers were seen across the Australian
region and in Antarctica. Similar conditions are expected for
UT days, 13-15 December, as a consequence of the continued very
low levels of ionising radiation from the Sun.
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For an explanation of some of the terms in this report, go to
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Glossary on Solar Terrestrial Terms.
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