[Ips-dhfpr] IPS Daily HF Prop Report - 21 September 11

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 21/2330Z SEPTEMBER 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 SEPTEMBER) 
Date   T index  Conditions    
21 Sep    78    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.8    1226UT  possible   lower  European

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values with occasional
      enhancements to 20%.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with mostly enhanced
      MUFs to 30% after about 15 UT. Night spread F observed
      at Hobart and Perth.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 30% enhanced.

PCA Event : No event.

Predicted Monthly T index for September:  62
2. FORECAST (22 SEPTEMBER - 24 SEPTEMBER)
Date   T index  Conditions       MUFs                              
22 Sep    70    Normal           Near predicted monthly values 
23 Sep    70    Normal           Near predicted monthly values     
24 Sep    65    Normal           Near predicted monthly values    
COMMENT: IPS HF Communications Warning 42 was issued on 21 September 
and is current for interval 22-23 September (SWFs) . With solar 
activity increasing, there is the chance of sudden disruptions 
to communications (short wave fade-outs). 

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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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