[Ips-dhfpr] IPS Daily HF Prop Report - 17 April 03

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 17/2330Z APRIL 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (17 APRIL) 
Date   T index  Conditions    
17 Apr    83    Normal         

Flares: none.

MUFs:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 25% during local night, with 
      variable local depressions.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Slightly below predicted monthly values
      with variable extended local disturbances.


PCA Event : No event.

Predicted Monthly T index for April:  77
2. FORECAST (18 APRIL - 20 APRIL)
Date   T index  Conditions       MUFs                              
18 Apr    90    Normal-Fair      near predicted monthly values 
19 Apr    90    Normal           Near predicted monthly values     
20 Apr   105    Normal           5 to 10% above predicted monthly 
                                 values    
COMMENT: Brief ionospheric depressions observed again overnight 
at low latitudes. Extensive spread-F conditions observed Antarctic 
regions. Periods of spread-F and high absorption observed at 
high latitudes in response to coronal hole induced geomagnetic 
disturbance. Mild ionospheric depressions observed after local 
dawn today NZ/S Ocean regions. Degraded HF conditions may be 
experienced today S Aus/NZ/Antarctic regions. Current solar coronal 
hole induced conditions should improve over the next two days. 

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