[Ips-dhfpr] IPS Daily HF Prop Report - 05 May 09

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 05/2330Z MAY 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (05 MAY) 
Date   T index  Conditions    
05 May     3    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Variable conditions during local day,
      Variable conditions during local night.
      Depressed by 25% 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.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced by 15% over the UT day.

PCA Event : No event.

Predicted Monthly T index for May:   4
2. FORECAST (06 MAY - 08 MAY)
Date   T index  Conditions       MUFs                              
06 May     4    Normal           near predicted monthly values 
07 May     8    Normal           about 5% above predicted monthly 
                                 values     
08 May     6    Normal           0 to 5% above predicted monthly 
                                 values    
COMMENT: Extensive night-time spread-F observed at equatorial 
(Cocos Is, Vanimo, Niue) and northern Australian (Darwin, Townsville) 
sites and often extending to mid-latitude sites (Bisbane, Norfolk 
Is), indicating strong upwelling in the equatorial ionospheric 
anomaly. Townsville observed strong night absorption and dusk 
sporadic-E. Overall there were moderate afternoon depletions 
and dusk enhancements at equatorial and northern Australian sites. 
Average conditions expected for 6th May UT and then mild enhancements 
7-8th May due to moderate geomagnetic activity from enhanced 
solar wind speed due to a coronal hole. 
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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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