[Ips-dhfpr] IPS Daily HF Prop Report - 27 December 07
rwc at ips.gov.au
Fri Dec 28 10:28:19 EST 2007
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 27/2330Z DECEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (27 DECEMBER)
Date T index Conditions
27 Dec -19 Poor-fair
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Depressed by 20% during local night.
Northern Australian Region:
Depressed by up to 30% over UT day.
Southern Australian and New Zealand Region:
Depressed by 15% over UT day.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed by 15% during local day,
Near predicted monthly values during local night.
PCA Event : No event.
Predicted Monthly T index for December: 5
2. FORECAST (28 DECEMBER - 30 DECEMBER)
Date T index Conditions MUFs
28 Dec -25 Poor-fair 10 to 30% below predicted monthly
29 Dec -30 Poor-fair 10 to 30% below predicted monthly
30 Dec -30 Poor-fair 10 to 30% below predicted monthly
COMMENT: IPS HF Communications Warning 46 was issued on 26 December
and is current for interval 27-29 December. MUF depressions of
up to 30% were observed at times across the Australian region
over the past 24 hours, particularly during local day. Widespread
and often blanketing Sporadic-E was again observed across the
Australian region over the UT day degrading 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. Continuing sporadic-E expected at mid latitudes.
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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