[Ips-dhfpr] IPS Daily HF Prop Report - 18 August 02
rwc
rwc at ips.gov.au
Mon Aug 19 09:17:14 EST 2002
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 18/2330Z AUGUST 2002 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 AUGUST)
Date T index Conditions
18 Aug 148 Normal-fair
Flares Max Fadeout Freq. Sectors
M2.5 1005UT possible lower European
M2.1 1439UT possible lower South American/
Atlantic
M2.4 2126UT possible lower East Pacific/
North American
MUFs:
Equatorial PNG Region:
Enhanced by 25-45% during local day,
Enhanced by 90% during local night.
Northern Australian Region:
Near predicted monthly values during local day,
Enhanced by 25%.
Southern Australian and New Zealand Region:
Enhanced by 15% during local day,
Enhanced by 40% during local night.
Antarctic Region (Casey/Scott Base):
Enhanced by 30% over the UT day.
Some spread and absorption observed.
PCA Event : No event.
Predicted Monthly T index for August: 102
2. FORECAST (19 AUGUST - 21 AUGUST)
Date T index Conditions MUFs
19 Aug 140 Normal-Fair about 15% above predicted monthly
values
20 Aug 140 Normal about 15% above predicted monthly
values
21 Aug 140 Normal-Fair about 15% above predicted monthly
values
COMMENT: IPS HF Communications Warning 40 was issued on 18 August
and is current for interval 19-21 August (SWFs) . Strong degradation
did not eventuate post CME shock arrival. Moderate degradation
possible local night hours day 1 and 3 of forecast period. Fadeouts
can be expected on daylight HF circuits.
IPS Radio and Space Services | email: asfc at ips.gov.au
PO Box 1386 | WWW: http://www.ips.gov.au/asfc
Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au/users/asfc/
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
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