[Ips-dhfpr] IPS Daily HF Prop Report - 09 September 08

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 09/2330Z SEPTEMBER 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 SEPTEMBER) 
Date   T index  Conditions    
09 Sep     0    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Enhanced by 15% during local day,
      Depressed by 15% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 30% over the UT day.

PCA Event : No event.

Predicted Monthly T index for September:   2
2. FORECAST (10 SEPTEMBER - 12 SEPTEMBER)
Date   T index  Conditions       MUFs                              
10 Sep     1    Normal           about 15% below predicted monthly 
                                 values 
11 Sep     1    Normal           Near predicted monthly values     
12 Sep     1    Normal           Near predicted monthly values    
COMMENT: MUF values across Australian/NZ regions were again slightly 
below average at mid-latitudes as the ionosphere is still recovering 
from the recent geomagnetic activity from a solar coronal hole. 
There was evidence of strong nighttime spread F at southern latitudes 
(Hobart). There were again both large depressions and enhancements 
at equatorial latitudes, Cocos Is and Vanimo having a strong 
foF2 peak in the local morning and a strong depletion in the 
afternoon and night. The western Pacific (Niue) showed a similar 
enhancement although smaller and lasting most of the day, followed 
by a weaker depletion. Sub-equatorial sites (Darwin, Townsville) 
also had the same pattern but weaker. Cocos also had very strong 
blanketing Es at dusk. There was a slight dusk/night depletion 
across mid-latitudes. Conditions are expected to be normal to 
slightly depressed for the next 2-3 days and another recurrent 
coronal hole should take effect ~14th Sept. 
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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
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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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