[Ips-dhfpr] IPS Daily HF Prop Report - 12 December 03

rwc rwc at ips.gov.au
Sat Dec 13 10:27:33 EST 2003


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 12/2330Z DECEMBER 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 DECEMBER) 
Date   T index  Conditions    
12 Dec    30    Fair           

Flares: none.

MUFs:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night and after 
      local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Depressed 10-20% after local dawn.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
      Depressed by 20% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day,
      with extended periods of disturbance.


PCA Event : No event.

Predicted Monthly T index for December:  50
2. FORECAST (13 DECEMBER - 15 DECEMBER)
Date   T index  Conditions       MUFs                              
13 Dec    25    Fair             depressed 10 to 20%/near predicted 
                                 monthly values 
14 Dec    35    Normal-Fair      depressed 10 to 20%/near predicted 
                                 monthly values     
15 Dec    50    Normal           Near predicted monthly values    
COMMENT: IPS HF Communications Warning 96 was issued on 11 December 
and is current for interval 12-13 December. Depressions observed 
in all Aus/NZ regions overnight and around local dawn. Persistent 
and occasionally intense sporadic-E layer observed in Equatorial/Aus 
regions. Depressions observed today around local dawn at low 
to mid latitudes are showing signs of recovery at report issue. 
High latitudes can expect extended periods of disturbance for 
the next few days. Coronal hole wind stream effects are expected 
to gradually decline over this period. 

IPS Radio and Space Services      | email: asfc at ips.gov.au
PO Box 1386                       | WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA     | FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010              | fax: +61 2 9213 8060 

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