[Ips-whfpr] IPS Weekly Prop. Report (13 April 05)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 13/0200Z APRIL 2005 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
+++ CORRECTED COPY +++
1. SUMMARY (06 APRIL - 12 APRIL)
Date   T index   Conditions        
06 Apr   66      Normal            
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 60% during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Enhanced by 20% over the UT day.
   Antarctic Region (Casey/Scott Base):
      Enhanced by 25% over the UT day.

07 Apr   61      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      No data available during local night.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Enhanced by 25% after local dawn.
   Southern Australian and New Zealand Region:
      Enhanced by 15-20%.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.

08 Apr   46      Normal            
MUFS:
   Equatorial PNG Region:
     Enhanced by 20% during local day,
     No data available during local night.
     Enhanced by 30% after local dawn.
  Northern Australian Region:
     Mostly near predicted monthly values,
  Southern Australian and New Zealand Region:
     Near predicted monthly values.
  Antarctic Region (Casey/Scott Base):
     Near predicted monthly values over the UT day.

09 Apr   42      Normal            
MUFS:
   Equatorial PNG Region:
     Near predicted monthly values during local day,
     No data available during local night.
  Northern Australian Region:
     Near predicted monthly values.
  Southern Australian and New Zealand Region:
     Mostly near predicted monthly values,
  Antarctic Region (Casey/Scott Base):
     Enhanced by 15% over the UT day.

10 Apr   53      Normal            
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced by 15% during local night.
      Enhanced by 20% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Enhanced by 30% over the UT day.

11 Apr   46      Normal            
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
      Range spread observed 12-15UT at Vanimo.
   Northern Australian Region:
      Enhanced by 15% during local day,
      Depressed by 15% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Enhanced by 15% over the UT day.

12 Apr   70      Fair              
MUFS:
   Equatorial PNG Region:
     Near predicted monthly values during local day,
     No data available during local night.
  Northern Australian Region:
     Near predicted monthly values during local day,
     Enhanced by 20% during local night.
  Southern Australian and New Zealand Region:
     Enhanced by 25% during local day,
     Enhanced by 25% during local night.
  Antarctic Region (Casey/Scott Base):
     Near predicted monthly values over the UT day.

Predicted Monthly T index for April:  29
2. FORECAST (13 APRIL - 19 APRIL) 
MUFS: depressed 15% briefly after local dawn on 14-Apr,  
      otherwise MUFs near normal. 
Propagation conditions: Fair late 13-14 Apr , otherwise normal. No SWFs
T index:   20 on 14 Apr, 55 other days.

COMMENT: IPS HF Communications Warning 18 was issued on 10 April and is 
current for interval  12-13 April. Coronal hole wind stream induced
activity expected. MUFs were not depressed on 12 April.

3. OUTLOOK (19 APRIL - 19 MAY)
Degraded HF propagation conditions possible:
29-Apr to 02-May,10-May.

PLEASE NOTE:
At this time of the solar cycle, space weather conditions
are frequently determined by short timescale events, not
able to be forecasted a week in advance.

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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