[Ips-dhfpr] IPS Daily HF Prop Report - 28 December 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 28/2330Z DECEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (28 DECEMBER) 
Date   T index  Conditions    
28 Dec   -31    Normal-poor    

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Depressed by 35% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 15% during local day,
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   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:   5
2. FORECAST (29 DECEMBER - 31 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Dec   -25    Normal-poor      depressed 15 to 30%/near predicted 
                                 monthly values 
30 Dec   -25    Normal-poor      depressed 15 to 30%/near predicted 
                                 monthly values     
31 Dec   -25    Normal-poor      depressed 15 to 30%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 46 was issued on 26 December 
and is current for interval 27-29 December. MUF depressions of 
up to 30% were observed at times across the Australian region 
over the past 24 hours. Blanketing Sporadic-E was again observed 
at times across the Australian region during the past 24 hours 
which may have effected HF propagation conditions. Continuing 
MUF depressions are expected at times over the Aus/NZ region 
for the next few days due to very low levels of solar activity, 
with significant depressions possible at times. Continuing sporadic-E 
expected at times for mid-latitudes. 
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For an explanation of some of the terms in this report, goto
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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