[Ips-dhfpr] IPS Daily HF Prop Report - 21 May 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 21/2330Z MAY 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (21 MAY) 
Date   T index  Conditions    
21 May    12    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Depressed by 20% over UT day.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   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:   9
2. FORECAST (22 MAY - 24 MAY)
Date   T index  Conditions       MUFs                              
22 May    18    Normal           near predicted monthly values 
23 May    12    Normal           near predicted monthly values     
24 May    12    Normal           near predicted monthly values    

COMMENT: HF conditions were mostly normal 21 May at mid latitudes. 
Periods of Spread-F were again observed at mid-high latitude 
stations. Equatorial stations suffered 20% MUF depressions. HF 
conditions are expected to be mostly normal 22 May. Degraded 
HF conditions possible at high latitudes. Some MUF depressions 
possible 23 May if the expected geomagnetic activity eventuates 
22 May. 

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For an explanation of some of the terms in this report, goto
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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