[Ips-whfpr] IPS Weekly Prop. Report (25 May 11)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 25/0200Z MAY 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 MAY - 24 MAY)
Date   T index   Conditions        
18 May   45      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day,
      No data available 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.

19 May   41      Normal-fair       
MUFS:
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Depressed by up to 20% between 03-15UT, 
      Near predicted monthly values at other times. 
   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 during local day,
      Depressed by up to 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

20 May   35      Normal-fair       
MUFS:
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Depressed by 10-20% over the UT day. 
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Near predicted monthly values to 20% depressed. 
   Southern Australian and New Zealand Region:
      Near predicted monthly values to 10% depressed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

21 May   33      Normal-fair       
MUFS:
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Near predicted monthly values to 20% depressed 
   Northern Australian Region:
      Depressed by up to 15% during local day,
      Depressed by up to 30% during local night.
   Southern Australian and New Zealand Region:
      Depressed by up to 20% during local day,
      Mostly near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

22 May   45      Normal-fair       
MUFS:
   Cocos Island Region:
      No data available. 
   Niue Island Region:
      Depressed by up to 30% between 01-13UT,
      Near predicted monthly values at other times.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by up to 30% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by up to 25% around local nightfall, 
      Enhanced by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

23 May   35      Normal            
MUFS:
   Cocos Island Region:
      Depressed by 20% during local day,
      Depressed by 20% during local night.
   Niue Island Region:
      Depressed by 20% during local day,
      Near predicted monthly values during local night.
      Depressed by 20% after local dawn.
   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.

24 May   38      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values, depressed periods
      20% during local day.
      Depressed by 20% during local night.
   Niue Island Region:
      Near predicted monthly values, depressed periods
      20% during local day.
      Depressed by 15% 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 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

Predicted Monthly T index for May:  49
2. FORECAST (25 MAY - 31 MAY) 
MUFS:Possible depressed conditions expected for 27May-30May
with otherwise near predicted monthly values.
Propagation conditions:Normal-Fair 27May-30May , otherwise normal. No SWFs
T index:  49

3. OUTLOOK (01 JUNE - 01 JULY)
Degraded HF propagation conditions possible:
22-Jun to 23-Jun,26-Jun.

PLEASE NOTE:
Space weather conditions can frequently be determined by short 
timescale events that cannot be forecast a week in advance,
particularly at solar maximum.

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
PO Box 1386                         WWW: http://www.ips.gov.au
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