[Ips-dhfpr] IPS Daily HF Prop Report - 22 March 09
rwc at ips.gov.au
Mon Mar 23 10:44:04 EST 2009
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z MARCH 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (22 MARCH)
Date T index Conditions
22 Mar 8 Normal
Equatorial PNG/Niue Region:
Near predicted monthly values.
Northern Australian Region:
Depressed by 20% during local day,
Near predicted monthly values during local night.
Southern Australian and New Zealand Region:
Depressed by 15% during local day,
Enhanced by 15% 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 March: 3
2. FORECAST (23 MARCH - 25 MARCH)
Date T index Conditions MUFs
23 Mar 0 Normal near predicted monthly values
24 Mar -5 Normal 0 to 5% below predicted monthly
25 Mar -5 Normal 0 to 5% below predicted monthly
COMMENT: HF maximum frequencies were enhanced on average across
the region over the entire UT day, but there were significant
variations. This was due to the geomagnetic enhancements from
the high-speed solar-wind stream from the coronal hole. Most
stations from Equatorial (Niue) to Southern (Hobart) showed a
significant depletion in F region frequencies in the local afternoon
followed by a significant enhancement after dusk. This was most
pronounced in Northern Australia (Darwin, Townsville, Learmonth).
There was widespread and significant spread-F due to the geomagnetic
disturbance. Across the region MUFs were enhanced slightly above
predicted monthly averages. Conditions are expected to return
to near monthly or slightly below over the UT day. Equatorial
latitudes may remain enhanced and disturbed for an extra day.
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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