[Ips-dhfpr] IPS Daily HF Prop Report - 22 December 07
rwc at ips.gov.au
Sun Dec 23 10:36:16 EST 2007
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z DECEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (22 DECEMBER)
Date T index Conditions
22 Dec -29 Normal-poor
Equatorial PNG/Niue Region:
Near predicted monthly values.
Northern Australian Region:
Near predicted monthly values during local day,
Depressed by 30% during local night.
Southern Australian and New Zealand Region:
Depressed by 20% during local day,
Depressed by 15% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Depressed 15% to mostly near predicted monthly values.
PCA Event : No event.
Predicted Monthly T index for December: 5
2. FORECAST (23 DECEMBER - 25 DECEMBER)
Date T index Conditions MUFs
23 Dec -20 Normal-poor depressed 15 to 30%/near predicted
24 Dec -20 Normal-poor depressed 15 to 30%/near predicted
25 Dec -20 Normal-poor depressed 15 to 30%/near predicted
COMMENT: IPS HF Communications Warning 44 was issued on 20 December
and is current for interval 21-23 December. Depressions of up
to 30% were observed at times across the Australian region over
the past 24 hours, otherwise MUFs were mostly near predicted
monthly values. Sporadic-E and Spread-F conditions were also
observed at times across the Australian region over the past
24 hours which may have affected HF propagation conditions. Mild
depressions are expected over the next few days due to very low
levels of solar activity, with significant depressions possible
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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