[Ips-dhfpr] IPS Daily HF Prop Report - 25 May 10

rwc rwc at ips.gov.au
Wed May 26 09:54:37 EST 2010


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 25/2330Z MAY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 MAY) 
Date   T index  Conditions    
25 May    10    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values to
      depressed by 20% during local day,
      Near predicted monthly values during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values to
      depressed by 25% during local day,
      Depressed by 15% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 15% 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 May:  24
2. FORECAST (26 MAY - 28 MAY)
Date   T index  Conditions       MUFs                              
26 May     9    Normal           near predicted monthly values/depressed 
                                 5 to 10% 
27 May     4    Normal-fair      about 20% below predicted monthly 
                                 values     
28 May     4    Normal-fair      near predicted monthly values/depressed 
                                 10 to 20%    
COMMENT: IPS HF Communications Warning 9 was issued on 25 May 
and is current for interval 27 May only. Mild MUF depressions 
were observed in the Australian region due to the lower EUV levels 
emitted from the sun, resulting from a low number of sunspots 
on the visible solar disc. Degraded conditions may be expected 
on 27 and 28 May. 
----------------------------------------------------------
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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