[Ips-dhfpr] IPS Daily HF Prop Report - 18 June 03
rwc at ips.gov.au
Thu Jun 19 08:51:03 EST 2003
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 18/2330Z JUNE 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 JUNE)
Date T index Conditions
18 Jun 74 Fair-normal
Flares Max Fadeout Freq. Sectors
M6.8 17/2255UT probable lower West Pacific
Equatorial PNG Region:
Enhanced by 25% during local day,
Enhanced by 40% during local night.
Enhanced by 35% after local dawn.
Northern Australian Region:
Enhanced by 20% during local day,
Enhanced by 60% during local night.
Southern Australian and New Zealand Region:
Mostly near predicted monthly values,
Depressed by 25% after local dawn.
Antarctic Region (Casey/Scott Base):
Proton event in progress, increased absorption observed.
PCA Event : 10Mev Proton/PCA Event Began 18 06 2003 2050UT and is in progress
Predicted Monthly T index for June: 68
2. FORECAST (19 JUNE - 21 JUNE)
Date T index Conditions MUFs
19 Jun 20 Poor-Fair depressed 10 to 20% (southern Aus/NZ region)
19 Jun 65 Normal-Fair near predicted monthly values (northern Aus region)
20 Jun 55 Fair depressed 10 to 15%/near predicted
21 Jun 55 Normal-Fair depressed 10 to 20%/near predicted
COMMENT: IPS HF Communications Warning 48 was issued on 18 June
and is current for interval 19-21 June (SWFs) . Southern region
MUFs depressed after local dawn this morning. Southern Aus/NZ
MUFs expected to be 15-20% depressed after local dawn over the
next few days. Northern Aus region MUFs expected to remain near
predicted monthly values. SWFs are expected over the next few
days. Transpolar HF circuits may be experiencing increased
absorption due to proton event(PCA).
IPS Radio and Space Services | email: asfc at ips.gov.au
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Haymarket NSW 1240 AUSTRALIA | FTP: ftp://ftp.ips.gov.au
tel: +61 2 9213 8010 | fax: +61 2 9213 8060
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