[Ips-dhfpr] IPS Daily HF Prop Report - 13 September 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 13/2330Z SEPTEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (13 SEPTEMBER) 
Date   T index  Conditions    
13 Sep    -0    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      No data available during local day,
      Depressed by 20% during local night.
   Northern Australian Region:
      Depressed by 20% during local day,
      Depressed by 20% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 25% over the UT day.

PCA Event : No event.

Predicted Monthly T index for September:  10
2. FORECAST (14 SEPTEMBER - 16 SEPTEMBER)
Date   T index  Conditions       MUFs                              
14 Sep     5    Normal           near predicted monthly values/depressed 
                                 10 to 20% 
15 Sep     0    Normal           10 to 20% below predicted monthly 
                                 values     
16 Sep     0    Normal           10 to 20% below predicted monthly 
                                 values    

COMMENT: MUFs across the Australian region were depressed 10-20% 
on average 13 Sep, particularly during the local day. In the 
absence of any geomagnetic activity this is likely due to a sustained 
period of inactivity on the sun and subsequent low levels of 
EUV. These ionospheric conditions are likely to continue 14 Sep. 
Increased geomagnetic activity on 14 Sep is likely to result 
in further ionospheric depressions 15-16 Sep. Continuing Spread 
F conditions likely in the S.Aus/NZ regions overnight.

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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.

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