[Ips-dhfpr] IPS Daily HF Prop Report - 20 December 09

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 DECEMBER) 
Date   T index  Conditions    
20 Dec    -3    Fair-normal    

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values. Night spread F 16-21
      UT. Sporadic E observed 00-02 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 20%
      00-03 and 19-21 UT. Some night spread F. Sporadic E
      observed 00-01 and 20-23 UT.
   Northern Australian Region:
      Near predicted monthly values. Enhancements to 20%
      00-04 UT and depressions to 30% 07-10 and 16-20 UT at
      Darwin and 04-05 and 17-19 UT at Townsville. Sporadic
      E observed at Darwin 18-19 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with occasional
      depressions to 15%. Sporadic E observed mostly 00-06
      and 17-23 UT, although observed 09-17 UT at Hobart.
      Some night spread F observed at Brisbane.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with depressions to 20%
      00-18 UT at Davis and 14-16 UT at Macquarie Is.

PCA Event : No event.

Predicted Monthly T index for December:   1
2. FORECAST (21 DECEMBER - 23 DECEMBER)
Date   T index  Conditions       MUFs                              
21 Dec    -5    Fair-normal      Near predicted monthly values 
                                 with occasional depressions 
                                 to 30%. 
22 Dec    -5    Fair-normal      Near predicted monthly values 
                                 with occasional depressions 
                                 to 30%.     
23 Dec    -5    Fair-normal      Near predicted monthly values 
                                 with occasional depressions 
                                 to 30%.    

COMMENT: The expected depressions for today and tomorrow are 
unlikely to occur. Summertime sporadic E may affect communications 
at times. 

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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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