[Ips-dhfpr] IPS Daily HF Prop Report - 11 September 08

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 11/2330Z SEPTEMBER 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (11 SEPTEMBER) 
Date   T index  Conditions    
11 Sep     0    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Depressed by 25% during local day,
      Depressed by 20% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Depressed by 25% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

Predicted Monthly T index for September:   2
2. FORECAST (12 SEPTEMBER - 14 SEPTEMBER)
Date   T index  Conditions       MUFs                              
12 Sep     1    Normal           0 to 5% below predicted monthly 
                                 values 
13 Sep     0    Normal           0 to 5% below predicted monthly 
                                 values     
14 Sep    -5    Normal-Fair      5 to 15% below predicted monthly 
                                 values    
COMMENT: MUF values across Australian/NZ regions were close to 
average at mid-latitudes. There were again both large depressions 
and enhancements at equatorial latitudes (Cocos Is, Vanimo, Niue). 
Sub-equatorial sites (Darwin, Learmonth) also had the same pattern 
but weaker. Conditions are expected to be normal to slightly 
depressed compared with predicted monthly T values for the next 
2 days and a recurrent coronal hole should take effect ~14th 
Sept, increasing geomag activity and decreasing MUFs. 
----------------------------------------------------------
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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