[Ips-dhfpr] IPS Daily HF Prop Report - 17 December 04

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 17/2330Z DECEMBER 2004 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 DECEMBER) 
Date   T index  Conditions    
17 Dec    47    Normal         

Flares: none.

MUFs:
   Equatorial PNG Region:
      Mostly near predicted monthly values,
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Predicted Monthly T index for December:  35
2. FORECAST (18 DECEMBER - 20 DECEMBER)
Date   T index  Conditions       MUFs                              
18 Dec    20    Fair-normal      Depressed 15% after local dawn, 
                                 then recovering 
19 Dec    35    Normal           Near predicted monthly values     
20 Dec    40    Normal           Near predicted monthly values    
COMMENT: IPS HF Communications Warning 56 was issued on 16 December 
and is current for interval 17-18 December. Northern Aus region 
MUFs enhanced 15% at times, resulting in a higher T than forecast. 
Also, depressions for southern Aus region were less than expected 
yeserday. Depressions after local dawn again expected for today 
for southern Aus/NZ region. 
----------------------------------------------------------
For an explanation of some of the terms in this report, goto
http://www.ips.gov.au, and follow links to Educational->
Gloassary on Solar Terrestrial Terms.

IPS Radio and Space Services      | email: asfc at ips.gov.au
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