[Ips-dhfpr] IPS Daily HF Prop Report - 18 December 12 issued 2323 UT on 18 Dec 2012

rwc rwc at ips.gov.au
Wed Dec 19 10:23:31 EST 2012


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/18 DECEMBER 2012 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 DECEMBER) 
Date   T index  Conditions    
18 Dec    82    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   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:  81


2. FORECAST (19 DECEMBER - 21 DECEMBER)
Date   T index  Conditions       MUFs                              
19 Dec    85    Normal           Near predicted monthly values
20 Dec    85    Normal           Near predicted monthly values    
21 Dec    85    Normal           Near predicted monthly values   

COMMENT: HF frequencies were near monthly medians over the last 
24 hours at mid latitudes. At northern near-equatorial latitudes 
there was more variability than mid-latitudes as usual. The region 
NW of Australia again showed significant daytime depressions, 
possibly the result of moderate geomagnetic activity from a coronal 
hole, which will decline over next UT day. Expect MUFs on 19-Dec 
to be average at predicted monthly values with low variability 
at mid-latitudes.

----------------------------------------------------------
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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