[Ips-dhfpr] IPS Daily HF Prop Report - 06 April 01

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 06/2330Z APRIL 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (06 APRIL) 
Date   T index  Conditions    
06 Apr   153    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  X5.7    1921UT  probable   all    East Pacific/
                                    North American

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


Predicted Monthly T index for April: 120
2. FORECAST (07 APRIL - 09 APRIL)
Date   T index  Conditions       MUFs                              
07 Apr   150    Normal           about 10% above predicted monthly 
                                 values 
08 Apr   100    Fair             10 to 20% below predicted monthly 
                                 values     
09 Apr    90    Fair-Poor        10 to 20% below predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 20 was issued on 6 April 
and is current for interval 8-10 April. Shortwave fadeouts expected 
on daylight HF circuits. Polar region HF comms still affected 
by PCA with proton fluxes still lingering around the event threshold. 
Depressed conditions for 8 and 9 April are expected following 
the arrival of two shocks associated with M5 and X5 flares and 
CMEs observed on the 5 and 6 April from region 9415. 

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