[Ips-dhfpr] IPS Daily HF Prop Report - 20 August 15 issued 2337 UT on 20 Aug 2015

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SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/20 AUGUST 2015 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 AUGUST) 
Date   T index  Conditions    
20 Aug    37    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 40% during local night.
   Niue Island Region:
      Depressed by 25% during local day.
      Depressed by 40% during local night.
   Northern Australian Region:
      Depressed by 15% during local day.
      Depressed by 30% during local night.
      Depressed by 20% after local dawn.
   Southern Australian Region:
      Depressed by 25% during local day.
      Depressed by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

PCA Event : No event.

Monthly T index:
Month  T index
Jul      60
Aug      80
Sep      78


2. FORECAST (21 AUGUST - 23 AUGUST)
Date   T index  Conditions       MUFs                              
21 Aug    40    Normal-fair      15 to 20% below predicted monthly 
                                 values
22 Aug    45    Normal-fair      15 to 20% below predicted monthly 
                                 values    
23 Aug    45    Normal-fair      15 to 20% below predicted monthly 
                                 values   

COMMENT: IPS HF Communications Warning 37 was issued on 19 August 
and is current for 19-21 Aug. Conditions for HF radio wave propagation 
were depressed throughout the Australian region during 20 August. 
Similar HF conditions are expected for 21 and 22 Aug. These depressions 
are due to continuos low levels of ionising solar flux. The HF 
conditions are expected to slowly trend back towards mildly depressed 
conditions relative to the long-term monthly prediction of T=80.

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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.

Space Weather Services              email: asfc at ips.gov.au
Bureau of Meteorology
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