[Ips-dhfpr] IPS Daily HF Prop Report - 25 September 06

rwc rwc at ips.gov.au
Tue Sep 26 09:48:22 EST 2006


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 25/2330Z SEPTEMBER 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 SEPTEMBER) 
Date   T index  Conditions    
25 Sep     6    Normal         

Flares: none.

MUFs:
slightly below predicted monthly values

PCA Event : No event.

Predicted Monthly T index for September:  11
2. FORECAST (26 SEPTEMBER - 28 SEPTEMBER)
Date   T index  Conditions       MUFs                              
26 Sep    10    Normal           5 to 10% below predicted monthly 
                                 values 
27 Sep    12    Normal           Near predicted monthly values     
28 Sep    12    Normal           Near predicted monthly values    
COMMENT: Equatorial latitudes (PNG, Niue, Nth QLD) have shown 
ionospheric depressions, particularly during the daytime and 
pre-dawn. This is presumed due to geomagnetic activity from the 
coronal-hole induced solar-wind speed elevation. Mid-latitudes 
appear to be still be holding better but are a little depressed. 
Conditions should return to normal in a day as Vsw declines to 
average. Spread F was not as prevalent as expected but did occur 
significantly at mid to higher latitudes (e.g. Hobart) 
----------------------------------------------------------
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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