[Ips-dhfpr] SWS Daily HF Prop Report - 13 December 18 issued 2332 UT on 13 Dec 2018 [SEC=UNCLASSIFIED]
rwc
rwc at ips.gov.au
Fri Dec 14 10:32:53 EST 2018
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/13 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (13 DECEMBER)
Date T index Conditions
13 Dec -49 Normal
Flares: none.
MUFs:
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Depressed by 20% during local day.
Depressed by 35% during local night.
Depressed by 20% after local dawn.
Northern Australian Region:
Near predicted monthly values during local day.
Depressed by 30% during local night.
Southern Australian Region:
Depressed by 20% during local day.
Depressed by 15% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Nov -32
Dec -8
Jan -9
2. FORECAST (14 DECEMBER - 16 DECEMBER)
Date T index Conditions MUFs
14 Dec -40 Normal Depressed 15 to 35%/near predicted
monthly values
15 Dec -40 Normal Depressed 15 to 35%/near predicted
monthly values
16 Dec -30 Normal Depressed 15 to 30%/near predicted
monthly values
COMMENT: SWS HF Communications Warning 26 was issued on 13 December
and is current for 14-15 Dec. On UT day 13 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 Niue Island, Northern
Australian and Central Australian regions. Sporadic E layers
were seen across the Australian region and in Antarctica. Similar
conditions are expected for UT days, 14-15 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
http://www.sws.bom.gov.au, and follow links to Educational->
Glossary on Solar Terrestrial Terms.
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