[Ips-whfpr] IPS Weekly Prop. Report (02 June 10)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 02/0200Z JUNE 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (26 MAY - 01 JUNE)
Date   T index   Conditions        
26 May   10      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values to 20% depressed during
      local day. Near predicted monthly values during local
      night.
   Niue Island Region:
      Depressed by 15% during local day. Near predicted
      monthly values during local night.
   Northern Australian Region:
      Depressed by 15% during local day. Near predicted
      monthly values during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day.
      Enhanced by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

27 May    9      Normal            
MUFS:
   Cocos Island Region:
      Mostly near predicted monthly values. Depressed by 20%
      after local dawn.
   Niue Island Region:
      Near predicted monthly values to 15% depressed during
      local day. Depressed by 15% during local night.
   Northern Australian Region:
      Near predicted monthly values to 15% depressed during
      local day. Depressed by 15% during local night.
      Depressed by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day. Near predicted
      monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

28 May    8      Normal            
MUFS:
   Cocos Island Region:
      Depressed by 20% during local day. Near predicted
      monthly values during local night.
   Niue Island Region:
      Depressed by 25% during local day. Near predicted
      monthly values during local night.
   Northern Australian Region:
      Depressed by 15% during local day. Near predicted
      monthly values 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.

29 May   25      Normal-fair       
MUFS:
   Cocos Island Region:
      Mostly near predicted monthly values.
   Niue Island Region:
      Depressed by 20% during local day. Enhanced by 20%
      during local night.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 40% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 30% over the UT day.

30 May    9      Normal-fair       
MUFS:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Depressed by 15% during local day. Near predicted
      monthly values during local night.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day. Near predicted
      monthly values during local night.
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 35% over the UT day.

31 May   -1      Normal-poor       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with enhancements to 35%
      03-10 UT and depressions to 30% 12-16 UT.
   Niue Island Region:
      Near predicted monthly values to 20% depressed.
   Northern Australian Region:
      Near predicted monthly values to 30% depressed.
      Enhancments to 30% 05-09 UT at Darwin. Spread F
      observed 13-20 UT.
   Southern Australian and New Zealand Region:
      Mostly 15-35% depressed. F region trace not observed
      on ionograms at times during the period 10-20 UT at
      Canberra, Hobart and Sydney due to depressed state of
      the F region. Spread F observed at Brisbane 10-18
      UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly depressed 15-40%.

01 Jun    0      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to 25%
      12-16 UT and enhancements to 30% 09-10 UT. Spread F
      16-21 UT.
   Niue Island Region:
      Depressed 15-30%.
   Northern Australian Region:
      Mostly 15-30% depressed with some night spread F.
   Southern Australian and New Zealand Region:
      Mostly 15-30% depressed. Night spread F observed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly 30-40% depressed.

Predicted Monthly T index for June:  26

2. FORECAST (02 JUNE - 08 JUNE) 
MUFS: MUFs near predicted monthly values. Depressions to 30%
      likely 02-04 June.
Propagation conditions: Fair to normal. No SWFs. Spread F may
      degrade communications passing through the night sector.
T index: 10

3. OUTLOOK (09 JUNE - 09 JULY)
Degraded HF propagation conditions possible:
 15 June
 26-29 June.

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
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