[Ips-dhfpr] IPS Daily HF Prop Report - 11 December 08
rwc
rwc at ips.gov.au
Fri Dec 12 10:28:43 EST 2008
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 11/2330Z DECEMBER 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (11 DECEMBER)
Date T index Conditions
11 Dec -25 Normal-fair
Flares: None
MUFs:
Equatorial PNG/Niue Region:
At Vanimo, frequencies mostly near predicted 00-14 UT
with depressions to 50% at times thereafter. At Niue,
frequencies were mostly 15-40% depressed with daytime
sporadic E and night time spread F observed.
Northern Australian Region:
At Darwin and Townsville, frequencies were depressed
to 30% 00-05 UT then mostly near predicted monthly
values. At Cocos Is., frequencies were near predicted
to 13 UT then mostly 30% depressed.
Southern Australian and New Zealand Region:
Frequencies were near predicted monthly values to 25%
depressed. Sporadic E observed at most stations.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values. Frequencies at
Macquarie Is. were near predicted with depressions to
30% 12-17 UT.
PCA Event : No event.
Predicted Monthly T index for December: 4
2. FORECAST (12 DECEMBER - 14 DECEMBER)
Date T index Conditions MUFs
12 Dec -30 Normal-fair Near predicted monthly values
to 30% depressed.
13 Dec -30 Normal-fair Near predicted monthly values
to 30% depressed.
14 Dec -35 Normal-fair Near predicted monthly values
to 30% depressed.
COMMENT: IPS HF Communications Warning 23 was issued on 11 December
and is current for interval 11-14 December. MUFs may increase
on 12th and 13th in response to increased ionisation due to solar
effects. However, MUFs are expected to return to depressed levels
on 14th.
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For an explanation of some of the terms in this report, go to
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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