[Ips-dhfpr] IPS Daily HF Prop Report - 20 December 06

rwc rwc at ips.gov.au
Thu Dec 21 09:54:28 EST 2006


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z DECEMBER 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 DECEMBER) 
Date   T index  Conditions    
20 Dec    -9    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
      Depressed by 25% after local dawn.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day,
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Extended periods of disturbance over the UT day.

PCA Event : No event.

Predicted Monthly T index for December:  10
2. FORECAST (21 DECEMBER - 23 DECEMBER)
Date   T index  Conditions       MUFs                              
21 Dec   -12    Fair             10 to 30% below predicted monthly 
                                 values 
22 Dec   -10    Normal-Fair      10 to 20% below predicted monthly 
                                 values     
23 Dec   -10    Normal           10 to 20% below predicted monthly 
                                 values    
COMMENT: IPS HF Communications Warning 42 was issued on 20 December 
and is current for interval 21 December only. Generally slightly 
depressed ionospheric conditions observed at all latitudes mainly 
local night. Periods of intense sporadic-E observed N and S Aus 
regions during local day/evening. Evening spread-F conditions 
observed S Aus/NZ regions. Expect ionospheric support to be slightly 
depressed over the next few days due to low solar flux and elevated 
geomagnetic activity. 
----------------------------------------------------------
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 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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