[Ips-dhfpr] IPS Daily HF Prop Report - 19 November 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 19/2330Z NOVEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 NOVEMBER) 
Date   T index  Conditions    
19 Nov   -43    Normal-poor    

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Depressed by 50% during local night.
      Depressed by 40% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 35% during local night.
      Depressed by 30% after local dawn.
   Southern Australian and New Zealand Region:
      Depressed by 20% during local day,
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day with 
      periods of depressions and degradations.

PCA Event : No event.

Predicted Monthly T index for November:  11
2. FORECAST (20 NOVEMBER - 22 NOVEMBER)
Date   T index  Conditions       MUFs                              
20 Nov   -35    Normal-fair      15 to 30% below predicted monthly 
                                 values 
21 Nov   -40    Fair             20 to 40% below predicted monthly 
                                 values     
22 Nov   -40    Fair             20 to 40% below predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 31 was issued on 18 
November and is current for interval 19-20 November. Widespread 
depressions in MUFs and degradations in HF conditions continue 
across Australian/ NZ/SW-Pacific region due to lack of solar 
ionisation. An anticipated rise in the geomagnetic activity 
levels from 20 to 22 November is expected to further contribute 
to the deterioration of HF conditions. Mild to significant 
degradations in HF conditions and depressions in MUFs may be 
observed across Aus/NZ regions for the next three days. 
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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->
Glossary on Solar Terrestrial Terms.

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