[Ips-dhfpr] IPS Daily HF Prop Report - 03 April 12 issued 2346 UT on 03 Apr 2012

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 03/2330Z APRIL 2012 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (03 APRIL) 
Date   T index  Conditions    
03 Apr    73    Normal         

Flares: none.

MUFs:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Depressed by 15% during local night.
   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 April:  81


2. FORECAST (04 APRIL - 06 APRIL)
Date   T index  Conditions       MUFs                              
04 Apr    75    Normal           0 to 5% below predicted monthly 
                                 values
05 Apr    70    Normal           0 to 5% below predicted monthly 
                                 values    
06 Apr    80    Normal           Near predicted monthly values   

COMMENT: HF conditions in the Australian region were mostly near 
predicted monthly values with northern near equatorial sites 
showing overnight MUF depressions, possibly from seasonal neutral 
winds in the thermosphere near 300km altitude driving the equatorial 
fountain, as geomagnetic activity is Quiet. MUFs are expected 
to remain mostly near or slightly below predicted monthly values 
for 3-6th April as sunspot number on the disc is slightly below 
the average cycle 24 rise. Some slight depression of MUFs possible 
on 5 April if a weak CME causes a geomagnetic disturbance.

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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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