[Ips-dhfpr] IPS Daily HF Prop Report - 20 December 06
rwc
rwc at ips.gov.au
Thu Dec 21 09:54:28 EST 2006
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z DECEMBER 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (20 DECEMBER)
Date T index Conditions
20 Dec -9 Normal-fair
Flares: none.
MUFs:
Equatorial PNG/Niue Region:
Near predicted monthly values during local day,
Depressed by 25% during local night.
Northern Australian Region:
Near predicted monthly values during local day,
Depressed by 15% during local night.
Depressed by 25% after local dawn.
Southern Australian and New Zealand Region:
Depressed by 15% during local day,
Depressed by 15% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Extended periods of disturbance over the UT day.
PCA Event : No event.
Predicted Monthly T index for December: 10
2. FORECAST (21 DECEMBER - 23 DECEMBER)
Date T index Conditions MUFs
21 Dec -12 Fair 10 to 30% below predicted monthly
values
22 Dec -10 Normal-Fair 10 to 20% below predicted monthly
values
23 Dec -10 Normal 10 to 20% below predicted monthly
values
COMMENT: IPS HF Communications Warning 42 was issued on 20 December
and is current for interval 21 December only. Generally slightly
depressed ionospheric conditions observed at all latitudes mainly
local night. Periods of intense sporadic-E observed N and S Aus
regions during local day/evening. Evening spread-F conditions
observed S Aus/NZ regions. Expect ionospheric support to be slightly
depressed over the next few days due to low solar flux and elevated
geomagnetic activity.
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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.
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PO Box 1386 WWW: http://www.ips.gov.au
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