[Ips-whfpr] IPS Weekly Prop. Report (20 April 05)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 20/0200Z APRIL 2005 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (13 APRIL - 19 APRIL)
Date   T index   Conditions        
13 Apr   50      Normal            
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
   Northern Australian Region:
      No data available during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
   Antarctic Region (Casey/Scott Base):
      Depressed by 15% over the UT day.

14 Apr   26      Fair-normal       
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 45% during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Depressed by 25% during local day,
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base):
      Depressed by 15% over the UT day with periods
      of minor to significant degradations. 

15 Apr   28      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 20% during local day,
      No data available during local night.
      Enhanced by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values with periods of
      minor to significant degradations. 

16 Apr   28      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 20% during local day,
      No data available during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Depressed by 15% over the UT day with periods
      of minor to significant degradations.

17 Apr   29      Normal            
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day
      with periods of minor to significant degradations.

18 Apr   35      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 45% during local night.
      Enhanced by 30% after local dawn.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values with periods of 
      minor to significant degradations. 

19 Apr   31      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values with periods of
      minor to significant degradations.

Predicted Monthly T index for April:  29
2. FORECAST (20 APRIL - 26 APRIL) 
MUFS: Minor to mild depressions possible from 20 to 24 April,
	especially in the Sourthern Aus/NZ regions, otherwise 
	MUFs near normal.
Propagation conditions: Mostly normal in the Northern Aus/NZ regions.
	Minor to mild degradations possible in HF conditions in 
	Southern Aus/NZ regions from 20 to 24 April. 
T index:   30

3. OUTLOOK (27 APRIL - 27 MAY)
Degraded HF propagation conditions possible:
01 to 02 May, 10 May, 18 to 20 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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