[Ips-dhfpr] IPS Daily HF Prop Report - 21 November 13 issued 2330 UT on 21 Nov 2013

[Regional Warning Centre]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 2330UT/21 NOVEMBER 2013 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   128    Strongly Enhanced         

Flares    Max     Fadeout    Freq.  Sectors
 M1/--    1111UT  possible   lower  European

MUFs:
   Cocos Island Region:
      No data available but probably enhanced.
   Niue Island Region:
      Enhanced by 5-40% for most of the day.
   Northern Australian Region:
      Enhanced by 10-35% for most of the day.
   Southern Australian and New Zealand Region:
      Enhanced by 15-50% for most of the day
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 20-60% for most of the day. 

PCA Event : No event.

Monthly T index:
Month  T index
Oct      88
Nov      71
Dec      69


2. FORECAST (22 NOVEMBER - 24 NOVEMBER)
Date   T index  Conditions          MUFs                              
22 Nov   135    Strongly Enhanced   Enhanced by 15-40% above predicted 
                                    monthly values
23 Nov   130    Enhanced            Enhanced by 15-30% above predicted 
                                    monthly values    
24 Nov   130    Enhanced            Enhanced by 10-30% above predicted 
                                    monthly values   

COMMENT: The ionospheric propagation support was enhanced at 
most Australian stations during 21 Nov. The only Australian station 
to record persistent near normal propagation conditions was Perth 
during the day time. The propagation conditions tended to be 
more strongly enhanced for stations located at higher latitudes. 
The ionospheric propagation support was especially strong for 
Australian Antarctic stations, with many ionosondes recording 
persistent foF2 values corresponding to local T indices of approximately 
250. The propagation support is expected to remain strongly enhanced, 
especially at high latitude stations, but eventually weaken due 
to the gradual decline of solar UV flux combined with seasonal 
thermospheric behaviour.

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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.

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