[Ips-dhfpr] IPS Daily HF Prop Report - 05 August 09
Regional Warning Centre
rwc at ips.gov.au
Thu Aug 6 09:55:33 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 05/2330Z AUGUST 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (05 AUGUST)
Date T index Conditions
05 Aug 12 Normal
Equatorial PNG/Niue Region:
Enhanced by 25% during local day,
Enhanced by 65% during local night.
Northern Australian Region:
Depressed by 25% during local day,
Enhanced by 15% during local night.
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Enhanced by 40% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Near predicted monthly values over the UT day.
PCA Event : No event.
Predicted Monthly T index for August: 1
2. FORECAST (06 AUGUST - 08 AUGUST)
Date T index Conditions MUFs
06 Aug 10 Normal 0 to 10% above predicted monthly
07 Aug 5 Normal Near predicted monthly values
08 Aug 5 Normal Near predicted monthly values
COMMENT: MUFs are expected to be slightly elevated in most parts
of Aus/NZ regions for the next day Onset of Unsettled geomagnetic
activity from a recurrent coronal hole on 05-06 August (UT) will
probably raise MUFs slightly. Nightime spread-F was observed
at sub-equatorial latitudes (Learmonth, Darwin, Brisbane) and
more strongly at equatorial latitudes (Cocos Is, Niue). A very
large transient MUF enhancement was observed at Niue pre-dusk
(03-06UT). Some mid-latitude stations also observed strong spread-F
post dusk (Hobart) and near dawn (Sydney). Es was observed near
dusk at Brisbane and late afternoon at Learmonth.
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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