[Ips-dhfpr] IPS Daily HF Prop Report - 22 July 07

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 22/2330Z JULY 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 JULY) 
Date   T index  Conditions    
22 Jul     8    Normal         

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Depressed by 20% during local day,
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Depressed by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 20% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

PCA Event : No event.

Predicted Monthly T index for July:  10
2. FORECAST (23 JULY - 25 JULY)
Date   T index  Conditions       MUFs                              
23 Jul     6    Normal           near predicted monthly values/depressed 
                                 10 to 20% 
24 Jul     6    Normal           near predicted monthly values/depressed 
                                 10 to 20%     
25 Jul     6    Normal           near predicted monthly values/depressed 
                                 10 to 20%    

COMMENT: The daytime ionosphere on 22 Jul showed some MUF depressions 
to 20%, particularly in the N.Aus/ Equatorial regions. The nighttime 
ionosphere continued to show MUF enhancements, particularly in 
the S/Aus/NZ regions. Strong sporadic E layers were again observed 
at a number of stations. The ionosphere is expected to show depressions 
over the next 2-3 days in the absence of elevated geomagnetic 
activity and solar flux from a spotless sun. MUF depressions 
up to 20% are possible. Night time spread-F observed in the S.Aus/NZ 
region is also expected to continue 23 Jul. 

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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.

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