[Ips-dhfpr] IPS Daily HF Prop Report - 22 May 07
rwc at ips.gov.au
Wed May 23 09:52:36 EST 2007
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z MAY 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (22 MAY)
Date T index Conditions
22 May 10 Normal
Equatorial PNG/Niue Region:
Depressed by 20% during local day,
Depressed by 25% during local night.
Northern Australian Region:
Mostly near predicted monthly values,
Southern Australian and New Zealand Region:
Near predicted monthly values during local day,
Enhanced by 20% during local night.
Antarctic Region (Casey/Scott Base/Davis/Mawson):
Enhanced by 45% over the UT day.
PCA Event : No event.
Predicted Monthly T index for May: 9
2. FORECAST (23 MAY - 25 MAY)
Date T index Conditions MUFs
23 May 12 Normal near predicted monthly values
24 May 26 Normal 10 to 20% above predicted monthly
25 May 30 Normal 10 to 20% above predicted monthly
COMMENT: HF conditions were mostly normal 22 May at mid latitudes.
Equatorial stations suffered 25-30% MUF depressions over the
UT day. Mid-high latitude stations were enhanced overnight. Periods
of Spread-F were again observed overnight at mid- high latitude
stations. Widespread occurrence of Sporadic-E was observed at
Low and Mid-latitudes for a 2-3 hour period after dusk. HF conditions
are expected to be mostly normal 23 May at mid-high latitudes.
Low latitudes may experience further depressions. MUF enhancements
are expected 24-25 May as the winter ionosphere responds to enhanced
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.
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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