[Ips-dhfpr] SWS Daily HF Prop Report - 12 December 16 issued 2334 UT on 12 Dec 2016 [SEC=UNCLASSIFIED]
rwc
rwc at ips.gov.au
Tue Dec 13 10:34:21 EST 2016
SUBJ: SWS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/12 DECEMBER 2016 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 -7 Poor-fair
Flares: B class flares
MUFs:
Cocos Island Region:
Near predicted monthly values.
Niue Island Region:
Depressed by 15% during local day.
Near predicted monthly values during local night.
Northern Australian Region:
Depressed by 20% during local day.
Near predicted monthly values 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):
Depressed by 20% over the UT day.
PCA Event : No event.
Monthly T index:
Month T index
Nov 3
Dec 24
Jan 23
2. FORECAST (13 DECEMBER - 15 DECEMBER)
Date T index Conditions MUFs
13 Dec -5 Fair 5 to 30% below predicted monthly
values
14 Dec 0 Fair 0 to 25% below predicted monthly
values
15 Dec 5 Fair 0 to 20% below predicted monthly
values
COMMENT: SWS HF Communications Warning 66 was issued on 12 December
and is current for 12-14 Dec. Conditions for HF radio wave propagation
were depressed in the Southern Hemisphere during 12 Dec UT. They
were more depressed at high latitudes than low latitudes. For
example, the local T index was -50 at Hobart and 9 at Darwin.
Conditions are expected to trend towards predicted monthly values
during the next 3 days. HF users are advised to use frequencies
lower than the predicted monthly values. Mid-latitude sporadic
E layers are prevalent on an almost daily basis.
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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.
Space Weather Services email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386 WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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