[Ips-dhfpr] IPS Daily HF Prop Report - 03 December 09

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 03/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 DECEMBER) 
Date   T index  Conditions    
03 Dec   -22    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Niue Island Region:
      Depressed by 20% during local day,
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 25% during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Predicted Monthly T index for December:   1
2. FORECAST (04 DECEMBER - 06 DECEMBER)
Date   T index  Conditions       MUFs                              
04 Dec   -15    Normal           about 0 20% below predicted 
                                 monthly values 
05 Dec   -15    Normal           about 0 20% below predicted 
                                 monthly values     
06 Dec   -15    Normal           about 0 20% below predicted 
                                 monthly values    
COMMENT: Slight nightime depletions were observed across Aus/NZ 
mid-latitude regions over the last 24 hours. Near equatorial 
stations observed large variations, especially at Cocos Is with 
a large post-noon depression, despite quiet geomagnetic conditions, 
so possibly caused by neutral winds in the thermosphere. Similar 
conditions are expected for the next 3 days. Blanketing sporadic-E 
(Esb) was observed for 1-2 hour periods at many east coast stations 
(Bri, Syd, Cnb) around local noon, but less extensive than earlier 
in the week. 
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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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