[Ips-dhfpr] IPS Daily HF Prop Report - 05 December 03

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 05/2330Z DECEMBER 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 DECEMBER) 
Date   T index  Conditions    
05 Dec   108    Normal-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 15% during local day,
      Enhanced by 55% during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 25% during local day,
      Enhanced by 20% during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.


PCA Event : No event.

Predicted Monthly T index for December:  50
2. FORECAST (06 DECEMBER - 08 DECEMBER)
Date   T index  Conditions       MUFs                              
06 Dec    35    Normal-Fair      depressed 15 to 20%/near predicted 
                                 monthly values 
07 Dec    40    Fair             depressed 15 to 20%/near predicted 
                                 monthly values     
08 Dec    40    Fair             depressed 15 to 20%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 93 was issued on 3 December 
and is current for interval 7-9 December. Unexpected geomagnetic 
activity overnight, possibly related to earlier than expected 
entry into coronal hole wind stream. Depressed MUFs observed after 
local dawn, southern Aus region only. An extended period of lower 
than normal MUFs may be experienced for asouthern Aus/NZ region up 
to around 15 Dec. Northern Aus region MUFs expected to remain near 
to 15% above normal, communicators within this region should use 
a Tindex of around 80. 

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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