[Ips-dhfpr] IPS Daily HF Prop Report - 22 December 06

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z DECEMBER 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 DECEMBER) 
Date   T index  Conditions    
22 Dec     6    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Depressed by 35% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Depressed by 25% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Predicted Monthly T index for December:  10
2. FORECAST (23 DECEMBER - 25 DECEMBER)
Date   T index  Conditions       MUFs                              
23 Dec   -10    Normal-fair      10 to 20% below predicted monthly 
                                 values 
24 Dec   -10    Normal-fair      10 to 20% below predicted monthly 
                                 values     
25 Dec     0    Normal           5 to 10% below predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 43 was issued on 22 December 
and is current for interval 23 December only. Variable ionospheric 
conditions observed Equatorial/N Aus regions. Periods of persistent 
and intense sporadic-E Equatorial/Aus/NZ regions after local 
dawn. Weak ionospheric support local day/evening especially at 
mid Aus and S Ocean latitudes. Extended periods of disturbance 
Antarctic region in association with elevated geomagnetic activity. 
Expect similar conditions days one to two. General improvement 
anticipated at higher latitudes days two to three. 
----------------------------------------------------------
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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Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
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