[Ips-dhfpr] IPS Daily HF Prop Report - 15 April 06

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 15/2330Z APRIL 2006 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 APRIL) 
Date   T index  Conditions    
15 Apr    16    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Enhanced by 35% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 20% during local night.
      Depressed by 25% after local dawn.
   Southern Australian and New Zealand Region:
      Depressed by 20% during local day/night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Extended periods of disturbance over the UT day.

PCA Event : No event.

Predicted Monthly T index for April:  16
2. FORECAST (16 APRIL - 18 APRIL)
Date   T index  Conditions       MUFs                              
16 Apr    10    Normal-Fair      depressed 10 to 20%/near predicted 
                                 monthly values 
17 Apr     5    Normal           depressed 10 to 20%/near predicted 
                                 monthly values     
18 Apr     5    Normal           depressed 10 to 20%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 4 was issued on 15 April 
and is current for interval 15-16 April. Variable regional HF 
conditions observed again under the influence of a high speed 
coronal hole wind stream. S Aus/NZ MUFs generally depressed, 
especially around local dawn. Sporadic E conditions observed 
some stations around local dawn. S Ocean/Antarctic conditions 
poor with extended periods of disturbance due to minor geomagnetic 
storming. The disturbance is due to a coronal hole wind stream 
which is expected to persist for day one, declining later on 
day two. Expect continuing variable HF conditions next 1-2 days. 
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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->
Gloassary 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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