[Ips-dhfpr] IPS Daily HF Prop Report - 31 May 06
rwc at ips.gov.au
Thu Jun 1 09:40:20 EST 2006
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 31/2330Z MAY 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (31 MAY)
Date T index Conditions
31 May 28 Normal
Currently slightly above predicted monthly values
Likely to be suppressed in the next 2-3 days.
PCA Event : No event.
Predicted Monthly T index for May: 15
2. FORECAST (01 JUNE - 03 JUNE)
Date T index Conditions MUFs
01 Jun 23 Normal-Fair about 15% below predicted monthly
02 Jun 17 Normal-Fair about 15% below predicted monthly
03 Jun 15 Normal-Fair about 20% below predicted monthly
COMMENT: IPS HF Communications Warning 8 was issued on 31 May
and is current for interval 1 June only. As the effects of the
coronal hole solar wind speed increase take effect on the geomagnetic
field, it will supress the ionosphere in the next 2-3 days. Depressions
of up to 30% are possible and likely to average 15-20%. Spread
F is already occurring at most tropical and some mid-latitude
stations, particularly night and pre-dawn. This is likely to
continue and degrade night time communications at all latitudes
over the next 2-3 days together with reduced MUFs.
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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