[Ips-dhfpr] IPS Daily HF Prop Report - 08 December 09

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 08/2330Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 DECEMBER) 
Date   T index  Conditions    
08 Dec   -30    Normal-fair    

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
   Niue Island Region:
      Depressed by 35% during local day,
      Depressed by 25% during local night.
   Northern Australian Region:
      Depressed by 15% during local day,
      Depressed by 15% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day, 
      Near predicted monthly values during local night.
   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 (09 DECEMBER - 11 DECEMBER)
Date   T index  Conditions       MUFs                              
09 Dec   -25    Normal           10 to 20% below predicted monthly 
                                 values 
10 Dec   -20    Normal           near predicted monthly values/depressed 
                                 10 to 20%     
11 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 equatorial and low latitudes. 
Sporadic E-layer, blanketing at times, was observed at a number 
of stations, particularly early in the local day. HF frequencies 
are expected to continue at moderately depressed levels for the 
next three days due to continuing weak solar activity, trending 
upwards as solar active regions move onto the visible solar disk. 

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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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