[Ips-dhfpr] IPS Daily HF Prop Report - 22 December 03

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z DECEMBER 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 DECEMBER) 
Date   T index  Conditions    
22 Dec    80    Normal         

Flares: none.

MUFs:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 20% during local night and after 
      local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night and after
      local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 20% during local night.
   Antarctic Region (Casey/Scott Base):
      Slightly below predicted  monthly values over 
      the UT day.


PCA Event : No event.

Predicted Monthly T index for December:  50
2. FORECAST (23 DECEMBER - 25 DECEMBER)
Date   T index  Conditions       MUFs                              
23 Dec    90    Normal           10 to 20% above predicted monthly 
                                 values 
24 Dec    90    Normal           10 to 20% above predicted monthly 
                                 values     
25 Dec   100    Normal           20 to 30% above predicted monthly 
                                 values    
COMMENT: Generally good HF conditions observed in most regions, 
despite continuing elevated solar wind velocities. Periods of 
sporadic-E were observed in S Aus/NZ region, and spread-F conditions 
observed in Antarctic region. The present coronal hole wind stream 
is likely to maintain elevated solar wind velocities for a few 
more days, but geomagnetic disturbance will continue to decline, 
resulting in continuing good HF propagation conditions. Periods 
of disturbance are likely at high latitudes only for the next 
three days. 

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