[Ips-whfpr] IPS Weekly Prop. Report (25 August 10)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 25/0200Z AUGUST 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (18 AUGUST - 24 AUGUST)
Date   T index   Conditions        
18 Aug   38      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day. Depressed by 15% during
      local night. Depressed by 25% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day. Depressed
      by 20% during local night. Depressed by 20% after local
      dawn.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day. Enhanced
      by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

19 Aug   24      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day. Depressed
      by 20% during local night.
   Niue Island Region:
      Near predicted monthly values to 15% depressed during
      local day. Depressed by 25% 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.

20 Aug   25      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values to 20% depressed during
      local day. Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values during local day. Enhanced
      by 25% during local night. Depressed by 20% after local
      dawn.
   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.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

21 Aug   23      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day. Near
      predicted monthly values to 30% depressed during local
      night.
   Niue Island Region:
      Depressed by 15% during local day. Near predicted
      monthly values during local night.
   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.

22 Aug   17      Normal-fair       
MUFS:
   Cocos Island Region:
      Near predicted monthly values to 20% depressed during
      local day. Depressed by 25% during local night.
      Depressed by 25% after local dawn.
   Niue Island Region:
      Enhanced by 20% during local day. Enhanced by 40% during
      local night.
   Northern Australian Region:
      Near predicted monthly values to 15% depressed 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.

23 Aug   18      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to 25%
      08-10, 13, 16-17 and 21-23 UT. Depressions to 45%
      14-15 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 30%
      01, 07-18 UT.
   Northern Australian Region:
      Near predicted monthly values with depressions to 30%
      at Darwin 05, 08-14 UT. Mostly 15-20% depressed at
      Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Depressions to 30% at
      times 08-16 UT Brisbane, Canberra and Hobart. Night
      spread F observed at most stations.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

24 Aug   33      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to 30%
      06-11, 16-17 UT.
   Niue Island Region:
      Near predicted monthly values with occasional
      enhancements to 20%. Depressions to 30% 01-02, 11-14
      UT.
   Northern Australian Region:
      Near predicted monthly values. Depressions to 25%
      03-08, 13, 14, 17 and 21 UT at Darwin. 
   Southern Australian and New Zealand Region:
      Near predicted monthly values to 25% enhanced.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressions to 20% 00-09 UT then near predicted
      monthly values to 25% enhanced.

Predicted Monthly T index for August:  27

2. FORECAST (25 AUGUST - 31 AUGUST) 
MUFS: MUFs near predicted monthly values to 20% depressed.
Propagation conditions: Normal. No SWFs
T index:  20

3. OUTLOOK (01 SEPTEMBER - 01 OCTOBER)
Degraded HF propagation conditions possible: No signficant
  degraded periods expected.

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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