[Ips-dhfpr] IPS Daily HF Prop Report - 21 November 07

rwc rwc at ips.gov.au
Thu Nov 22 10:42:11 EST 2007


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 21/2330Z NOVEMBER 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 NOVEMBER) 
Date   T index  Conditions    
21 Nov   -82    Poor-normal    

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Depressed by 45% during local day,
      Depressed by 45% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 45% during local day,
      Depressed by 35% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 40% during local day,
      Depressed by 40% during local night.
      Depressed by 25% after local dawn.
   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 (22 NOVEMBER - 24 NOVEMBER)
Date   T index  Conditions       MUFs                              
22 Nov   -45    Normal-fair      15 to 30% below predicted monthly 
                                 values 
23 Nov   -40    Normal           15 to 30% below predicted monthly 
                                 values     
24 Nov   -30    Normal           10 to 20% below predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 32 was issued on 
20 November and is current for interval 21-22 November. 
Widespread depressions in MUFs continued across the 
Australian/ NZ/SW-Pacific region due to lack of solar 
ionisation. Minor to significant degradations in HF 
conditions and depressions in MUFs may be expected across 
Aus/NZ regions for the next two days. Some improvements 
in conditions may be possible on 24 November as the currently 
going on coronal hole effect is expected to be over by then. 
----------------------------------------------------------
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
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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