[Ips-dhfpr] SWS Daily HF Prop Report - 16 December 18 issued 2334 UT on 16 Dec 2018 [SEC=UNCLASSIFIED]
rwc
rwc at ips.gov.au
Mon Dec 17 10:34:41 EST 2018
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/16 DECEMBER 2018 BY Space Weather Services
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (16 DECEMBER)
Date T index Conditions
16 Dec -40 Normal
Flares: none.
MUFs:
Cocos Island Region:
No data available during local day.
No data available during local night.
Niue Island Region:
Depressed by 15% during local day.
No data available during local night.
Northern Australian Region:
Depressed by 15% during local day.
Depressed by 15% during local night.
Southern Australian 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.
Monthly T index:
Month T index
Nov -32
Dec -8
Jan -9
2. FORECAST (17 DECEMBER - 19 DECEMBER)
Date T index Conditions MUFs
17 Dec -30 Normal Depressed 15 to 30%/near predicted
monthly values
18 Dec -30 Normal Depressed 15 to 30%/near predicted
monthly values
19 Dec -30 Normal Depressed 15 to 30%/near predicted
monthly values
COMMENT: SWS HF Communications Warning 28 was issued on 16 December
and is current for 17 Dec only. On UT day 16 December, there
were minor to moderate MUF depressions across the Australian
region as compared to the monthly predicted levels. Sporadic
E layers were seen across the Australian region and in Antarctica.
Similar conditions are expected for UT day, 17 December, as a
consequence of the continued very low levels of ionising radiation
from the Sun. Depressions may lessen on UT day, 18 December,
in response to possible geomagnetic activity due to an approaching
coronal hole.
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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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