[Ips-dhfpr] IPS Daily HF Prop Report - 27 July 06
rwc at ips.gov.au
Fri Jul 28 09:56:35 EST 2006
SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 27/2330Z JULY 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (27 JULY)
Date T index Conditions
27 Jul 21 Normal
about 10% above predicted monthly values
PCA Event : No event.
Predicted Monthly T index for July: 13
2. FORECAST (28 JULY - 30 JULY)
Date T index Conditions MUFs
28 Jul 20 Normal about 10% above predicted monthly
29 Jul 17 Normal near predicted monthly values
30 Jul 18 Normal about 5% above predicted monthly
COMMENT: Overall conditions are still enhanced across the region,
less than yesterday. Equatorial (northern) latitudes still show
strong enhancements around dusk, followed by night-time depletions
due to equatorial mechanisms. Slightly higher ionising X-ray
flux from solar AR901 to enhance the ionisphere will be competing
with increased geomagnetic activity from a coronal hole solar
wind speed increase, trying to depress the ionosphere. The nett
result is likely to be a still slightly enhance condition. High
latitudes are likely to be very disturbed for the next day or
two due to IMF Bz southwards causing merging with the geomag
field and enhancing ionospheric convection, coupled with the
effects of the shock front at 13UT and increased solar wind speeds/densities.
For an explanation of some of the terms in this report, goto
http://www.ips.gov.au, and follow links to Educational->
Gloassary 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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