[Ips-dhfpr] IPS Daily HF Prop Report - 15 May 05

rwc rwc at ips.gov.au
Mon May 16 09:43:37 EST 2005


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 15/2330Z MAY 2005 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (15 MAY) 
Date   T index  Conditions    
15 May    51    Fair           

Flares    Max     Fadeout    Freq.  Sectors
  M3.5    2236UT  confirmed  lower  West Pacific

MUFs:
   Equatorial PNG Region:
      Enhanced by 25% during local day,
      Depressed by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 35% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base):
      Enhanced by 55% over the UT day.

PCA Event : Began at 0545UT 14/05, Ended at 1225UT 15/05
 

Predicted Monthly T index for May:  27
2. FORECAST (16 MAY - 18 MAY)
Date   T index  Conditions       MUFs                              
16 May    20    Normal-Fair      Depressed 15% after local dawn, 
                                 then recovering 
17 May    20    Normal           Depressed 15% after local dawn, 
                                 then recovering     
18 May    35    Normal-Fair      Near predicted monthly values    
COMMENT: IPS HF Communications Warning 21 was issued on 14 May 
and is current for interval 15-16 May. Degraded HF conditions 
overnight. Australian regional ionosphere has not had a strong 
storm response to overnight geomagnetic activity, probably due 
to seasonal factors. Northern hemisphere ionosphere appears to 
be more significantly impacted. Degraded conditions may be experieneced 
for today, then improving. A return to degraded conditions may 
be experienced on 19 May, following this morning presumed mass 
ejection. 
----------------------------------------------------------
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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