[Ips-dhfpr] IPS Daily HF Prop Report - 20 May 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 20/2330Z MAY 2007 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    16    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Enhanced by 30% during local day,
      Depressed by 35% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 35% 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:   9
2. FORECAST (21 MAY - 23 MAY)
Date   T index  Conditions       MUFs                              
21 May    14    Normal-Fair      near predicted monthly values 
22 May    12    Normal           near predicted monthly values     
23 May     6    Normal           Near predicted monthly values 
                                 / Depressed by 10%.    

COMMENT: HF conditions were mostly normal 20 May. Periods of 
Spread-F were again observed at mid-high latitude stations. Equatorial 
stations suffered some MUF depressions overnight. HF conditions 
are expected to be much the same 21 May with minor MUF depressions 
at low latitudes and further Spread-F possible at mid-high latitudes. 
Expect mostly normal HF conditions 22 May. MUF depressions possible 
23 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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