[Ips-dhfpr] IPS Daily HF Prop Report - 22 April 11

Regional Warning Centre rwc at ips.gov.au
Sat Apr 23 09:55:30 EST 2011


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z APRIL 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 APRIL) 
Date   T index  Conditions    
22 Apr    61    Normal         

Flares    Max     Fadeout    Freq.  Sectors
  M1.8    0459UT  possible   lower  E. Asia/Aust.
  M1.2    1554UT  possible   lower  South American/
                                    Atlantic

MUFs:
   Cocos Island Region:
      Enhanced by 25% during local day,
      Near predicted monthly values during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 15% at times during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values to enhanced by 15%.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

PCA Event : No event.

Predicted Monthly T index for April:  44
2. FORECAST (23 APRIL - 25 APRIL)
Date   T index  Conditions       MUFs                              
23 Apr    60    Normal           Near predicted monthly values 
24 Apr    60    Normal           Near predicted monthly values     
25 Apr    55    Normal           Near predicted monthly values    
COMMENT: IPS HF Communications Warning 27 was issued on 22 April 
and is current for interval 22-23 April (SWFs) . Sporadic-E and 
Spread-F conditions were observed at times during 22 April which 
may have degraded HF conditions. Mostly normal conditions are 
expected for the next few days. Sporadic-E and Spread-F conditions 
are possible at times over the next few days. There is the chance 
of SWFs over the next 24 hours. 
----------------------------------------------------------
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
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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