[Ips-dhfpr] IPS Daily HF Prop Report - 07 December 09

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 07/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (07 DECEMBER) 
Date   T index  Conditions    
07 Dec   -32    Normal-fair    

Flares: none.

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

PCA Event : No event.

Predicted Monthly T index for December:   1
2. FORECAST (08 DECEMBER - 10 DECEMBER)
Date   T index  Conditions       MUFs                              
08 Dec   -25    Normal           10 to 20% below predicted monthly 
                                 values 
09 Dec   -25    Normal           10 to 20% below predicted monthly 
                                 values     
10 Dec   -20    Normal           near predicted monthly values/depressed 
                                 10 to 20%    

COMMENT: IPS HF Communications Warning 8 was issued on 7 December 
and is current for interval 8-9 December. MUFs were consistently 
depressed across the Australian region over the day, with stronger 
depressions during the day and at mid-low latitudes. Blanketing 
sporadic E-layer was also observed for 1-2 hours around midday 
at several mid-latitude stations. HF frequencies are expected 
to continue at moderately depressed levels for the next three 
days due to continuing weak solar activity. 

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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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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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