[Ips-dhfpr] IPS Daily HF Prop Report - 20 May 10

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SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z MAY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (20 MAY) 
Date   T index  Conditions    
20 May    18    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
   Niue Island Region:
      Depressed by 25% during local day,
      Depressed by 20% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 15% during local day,
      Near predicted monthly values 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):
      Depressed by 15% over the UT day.

PCA Event : No event.

Predicted Monthly T index for May:  24
2. FORECAST (21 MAY - 23 MAY)
Date   T index  Conditions       MUFs                              
21 May    20    Normal           depressed 10 to 20%/near predicted 
                                 monthly values 
22 May    20    Normal           Near predicted monthly values     
23 May    20    Normal           Near predicted monthly values    
COMMENT: Mild MUF depressions were observed in the Australian 
region due to the lower EUV levels emitted from the sun, resulting 
from the lack of sunspots on the visible solar disc. Expect this 
trend to continue until sunspot numbers return to predicted levels. 
Note, sunspot region 1069 is due to rotate onto the visible solar 
disc on 22 May. 
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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
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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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