[Ips-dhfpr] IPS Daily HF Prop Report - 06 December 09

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 06/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (06 DECEMBER) 
Date   T index  Conditions    
06 Dec   -18    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 25% over the UT day.

PCA Event : No event.

Predicted Monthly T index for December:   1
2. FORECAST (07 DECEMBER - 09 DECEMBER)
Date   T index  Conditions       MUFs                              
07 Dec   -10    Normal           about 0 15% below predicted 
                                 monthly values 
08 Dec   -10    Normal           about 0 15% below predicted 
                                 monthly values     
09 Dec   -10    Normal           about 0 15% below predicted 
                                 monthly values    
COMMENT: Overall depressions in MUFs were again observed with 
north and near equatorial area showing the greatest decreases. 
Near-equatorial stations (Cocos Is, Niue) again showed much greater 
variability than mid-latitudes, despite the low geomagnetic activity. 
Blanketing by sporadic E-layer occurred for 1-2 hours at several 
mid-latitude stations (Sydney, Canberra, Norfolk Is). HF frequencies 
expected to be similarly mildly depressed for the next three 
days. 
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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.

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