[Ips-dhfpr] IPS Daily HF Prop Report - 21 September 08

rwc rwc at ips.gov.au
Mon Sep 22 09:30:24 EST 2008


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 21/2330Z SEPTEMBER 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 SEPTEMBER) 
Date   T index  Conditions    
21 Sep   -15    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Depressed by 40% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Irregular periods of MUF depressions and enhancements, 
      and degraded HF conditions observed. 

PCA Event : No event.

Predicted Monthly T index for September:   2
2. FORECAST (22 SEPTEMBER - 24 SEPTEMBER)
Date   T index  Conditions       MUFs                              
22 Sep   -12    Normal           near predicted monthly values/depressed 
                                 5 to 15% 
23 Sep   -12    Normal           near predicted monthly values/depressed 
                                 5 to 15%     
24 Sep   -12    Normal           near predicted monthly values/depressed 
                                 5 to 15%    
COMMENT: Degradations in HF conditions and depressions in MUFs 
were observed today, especially at low and high latitudes. Poor 
ionisation due to continued very low levels of solar activity 
seems to be the reason for this. Mid latitudes were less affected 
by this phenomenon. Similar HF conditions may be expected across 
Auz/NZ regions for the next three days. 
----------------------------------------------------------
For an explanation of some of the terms in this report, go to
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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