[Ips-dhfpr] IPS Daily HF Prop Report - 20 November 04

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z NOVEMBER 2004 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    66    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG Region:
      No data available during local day,
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 25% during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 25% during local day,
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base):
      Enhanced by 25% over the UT day.


PCA Event : No event.

Predicted Monthly T index for November:  35
2. FORECAST (21 NOVEMBER - 23 NOVEMBER)
Date   T index  Conditions       MUFs                              
21 Nov    10    Fair-Normal      depressed 10 to 20%(southern Aus/NZ)
21 Nov    40    Normal           near predicted monthly values (North Aus)
22 Nov    55    Normal           about 15% above predicted monthly 
                                 values     
23 Nov    55    Normal           about 15% above predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 52 was issued on 20 November 
and is current for interval 21 November only. Depressed MUFs 
observed after dawn this morning following unexpected geomagnetic 
activity, probably from earlier than expected arrival of coronal 
hole wind stream. Northern region MUFs expected to remain near 
normal, hence two T indices forcast for today. HF Communicators 
should use the lower of the two indices when communicating from 
one region to the other. 
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For an explanation of some of the terms in this report, goto
http://www.ips.gov.au, and follow links to Educational->
Gloassary on Solar Terrestrial Terms.

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