[Ips-dhfpr] IPS Daily HF Prop Report - 27 May 10

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 27/2330Z MAY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 MAY) 
Date   T index  Conditions    
27 May     9    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Mostly near predicted monthly values,
      Depressed by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values to 
      depressed by 15% during local day,
      Depressed by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values to
      depressed by 15% during local day,
      Depressed by 15% during local night.
      Depressed by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day,
      Near predicted monthly values 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 (28 MAY - 30 MAY)
Date   T index  Conditions       MUFs                              
28 May     7    Normal-fair      near predicted monthly values/depressed 
                                 5 to 20% 
29 May     7    Normal-fair      near predicted monthly values/depressed 
                                 5 to 20%     
30 May     7    Normal-fair      near predicted monthly values/depressed 
                                 5 to 15%    
COMMENT: IPS HF Communications Warning 10 was issued on 26 May 
and is current for interval 27-28 May. 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. Minor to moderated degradations 
in HF conditions may be expected from 28 to 30 May due to an 
expected rise in geomagnetic activity levels on these days. 
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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.

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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