[Ips-dhfpr] IPS Daily HF Prop Report - 20 November 03

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z NOVEMBER 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 NOVEMBER) 
Date   T index  Conditions    
20 Nov    48    Normal-poor    

Flares    Max     Fadeout    Freq.  Sectors
M9.6/2B    0747UT  probable   lower  Mid East/Indian

MUFs:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
      Depressed by 40% after local dawn.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
      Depressed by 40% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values for the first
      half of the UT day followed by depressions of
      15-30% and greater.


PCA Event : No event.

Predicted Monthly T index for November:  52
2. FORECAST (21 NOVEMBER - 23 NOVEMBER)
Date   T index  Conditions       MUFs                              
21 Nov    45    Fair             depressed 15 to 30%/near predicted 
                                 monthly values 
22 Nov    60    Fair             near predicted monthly values/depressed 
                                 10 to 20%     
23 Nov    60    Fair             depressed 10 to 20%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 88 was issued on 18 November 
and is current for interval 19-21 November (SWFs) . The anticipated 
geomagnetic activity levels were significantly higher than expected 
resulting in severe ionospheric depressions of greater than 30% 
at times. Significant depressions are again expected for the 
early 21 November. Depressions are again possible later in the 
UT day of 22 November and into 23 November, with SWF's also possible 
over the next few days. 

IPS Radio and Space Services      | email: asfc at ips.gov.au
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Haymarket NSW 1240  AUSTRALIA     | FTP: ftp://ftp.ips.gov.au 
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