[Ips-dhfpr] IPS Daily HF Prop Report - 24 December 07
rwc
rwc at ips.gov.au
Tue Dec 25 10:15:29 EST 2007
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 24/2330Z DECEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (24 DECEMBER)
Date T index Conditions
24 Dec -26 Normal
Flares: none.
MUFs:
Equatorial PNG/Niue Region:
Depressed by 20% over UT day.
Northern Australian Region:
Depressed by 20% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Depressed by 20% during local day,
Near predicted monthly values 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: 5
2. FORECAST (25 DECEMBER - 27 DECEMBER)
Date T index Conditions MUFs
25 Dec -32 Normal 10 to 30% below predicted monthly
values
26 Dec -35 Normal 10 to 30% below predicted monthly
values
27 Dec -40 Normal 10 to 30% below predicted monthly
values
COMMENT: IPS HF Communications Warning 45 was issued on 23 December
and is current for interval 24-26 December. Depressions of up
to 30% were observed at times across the Australian region over
the past 24 hours, particularly during the local day. Periods
of Sporadic-E were also observed at some mid to low latitude
stations over the past 24 hours which may have affected HF propagation
conditions. Continuing MUF depressions are expected over the
next few days due to very low levels of solar activity, with
significant depressions possible at times.
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For an explanation of some of the terms in this report, goto
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
Haymarket NSW 1240 AUSTRALIA FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 fax: +61 2 9213 8060
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