[Ips-dhfpr] IPS Daily HF Prop Report - 18 April 03

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 18/2330Z APRIL 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 APRIL) 
Date   T index  Conditions    
18 Apr    80    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
  M1.1    1958UT  possible   lower  East Pacific/
                                    North American

MUFs:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      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 April:  77
2. FORECAST (19 APRIL - 21 APRIL)
Date   T index  Conditions       MUFs                              
19 Apr    90    Normal-Fair      Near predicted monthly values 
20 Apr   100    Normal           near predicted monthly values     
21 Apr   110    Normal           5 to 10% above predicted monthly 
                                 values    
COMMENT: Mild ionospheric depressions due to absorption observed 
throughout the UT day NZ/S Ocean region. 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. Expect similar conditions today. Current 
solar coronal hole induced conditions should improve over the 
next two days. 

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