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

[Regional Warning Centre]

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

1. SUMMARY (05 AUGUST) 
Date   T index  Conditions    
05 Aug    12    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Enhanced by 25% during local day,
      Enhanced by 65% during local night.
   Northern Australian Region:
      Depressed by 25% during local day,
      Enhanced by 15% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 40% 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 August:   1
2. FORECAST (06 AUGUST - 08 AUGUST)
Date   T index  Conditions       MUFs                              
06 Aug    10    Normal           0 to 10% above predicted monthly 
                                 values 
07 Aug     5    Normal           Near predicted monthly values     
08 Aug     5    Normal           Near predicted monthly values    
COMMENT: MUFs are expected to be slightly elevated in most parts 
of Aus/NZ regions for the next day Onset of Unsettled geomagnetic 
activity from a recurrent coronal hole on 05-06 August (UT) will 
probably raise MUFs slightly. Nightime spread-F was observed 
at sub-equatorial latitudes (Learmonth, Darwin, Brisbane) and 
more strongly at equatorial latitudes (Cocos Is, Niue). A very 
large transient MUF enhancement was observed at Niue pre-dusk 
(03-06UT). Some mid-latitude stations also observed strong spread-F 
post dusk (Hobart) and near dawn (Sydney). Es was observed near 
dusk at Brisbane and late afternoon at Learmonth. 
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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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