[Ips-dhfpr] IPS Daily HF Prop Report - 05 January 10

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 05/2330Z JANUARY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 JANUARY) 
Date   T index  Conditions    
05 Jan   -12    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
      Depressed by 20% after local dawn.
   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):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Predicted Monthly T index for January:   3
2. FORECAST (06 JANUARY - 08 JANUARY)
Date   T index  Conditions       MUFs                              
06 Jan   -10    Normal           near predicted monthly values/depressed 
                                 10 to 20% 
07 Jan   -10    Normal           near predicted monthly values/depressed 
                                 10 to 20%     
08 Jan   -15    Normal           near predicted monthly values/depressed 
                                 10 to 30%    
COMMENT: MUFs remain moderately depressed compared with predicted 
monthly values, presumably due to summer seasonal interhemispheric 
(south to north) winds. With AR1039 rotating off the disc there 
is less compensating ionising EUV and X-ray flux. Several active 
regions can be seen by the STEREO-B spacecraft, rotating toward 
earthward, and should add extra ionising flux in a few days. 
Moderate variability observed over mid-latitudes but high variability 
as usual at northern sub-equatorial latitudes from winds and 
electric fields as geomagnetic activity is Quiet. Extensive sporadic 
E was observed across Australia, much of it non-blanketing but 
still screening the F-layer substantially. 
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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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