[Ips-dhfpr] IPS Daily HF Prop Report - 28 December 02

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 28/2330Z DECEMBER 2002 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   112    Fair           

Flares: none.

MUFs:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night.
   Northern Australian Region:
      Enhanced by 20-30% over the UT day.
   Southern Australian and New Zealand Region:
      Near predicted monthly values over the UT day.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values.


PCA Event : No event.

Predicted Monthly T index for December:  90
2. FORECAST (29 DECEMBER - 31 DECEMBER)
Date   T index  Conditions       MUFs                              
29 Dec   130    Normal-Fair      10 to 20% above predicted monthly 
                                 values 
30 Dec   140    Normal           10 to 20% above predicted monthly 
                                 values     
31 Dec   140    Normal           10 to 20% above predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 81 was issued on 25 December 
and is current for interval 28-29 December. Persistent and occasionally 
intense sporadic E observed at all stations, but particularly 
at mid to high latitudes. Persistent spread F observed at Antarctic 
stations. Coronal hole induced geomagnetic activity may cause 
mild ionospheric depressions, but is expected to decline over 
the next few days. 

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