[Ips-whfpr] IPS Weekly Prop. Report (29 July 09)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 29/0200Z JULY 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (22 JULY - 28 JULY)
Date   T index   Conditions        
22 Jul   16      Normal-fair       
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values during local day.
      Enhanced by 20% during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 15% during local day.
      Enhanced by 40% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day with
      periods of degradations.

23 Jul    4      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day.
      Depressed by 20% 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 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day with 
      periods of minor to significant degradations. 

24 Jul   -3      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   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 with
      periods of minor to significant degradations.

25 Jul   -7      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   Northern Australian Region:
      Depressed by 20% during local day.
      Near predicted monthly values during local night.
   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 with 
      periods of minor to significant degradations. 

26 Jul   -9      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Depressed by 20% during local day.
      Depressed by 20% during local night.
      Depressed by 25% after local dawn.
   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 with
      periods of minor to significant degradations. 

27 Jul   -7      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values at Niue with depressions
      to 30% 00, 12-15 and 20 UT. No data for Vanimo.
   Northern Australian Region:
      Near predicted monthly values with depressions to 40%
      mostly between 03-12 and 18-19 UT. No data for
      Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. No data for
      Christchurch.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

28 Jul    1      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values with depressions to 25%
      01 and 21-22 UT. No data for Vanimo.
   Northern Australian Region:
      Near predicted monthly values with depressions to 30%
      mostly between 01-06 and 09-13 UT. Night spread F
      observed at most stations.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Enhancements to 40%
      observed at Canberra, Hobart and Sydney 12-20 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values.

Predicted Monthly T index for July:   6

2. FORECAST (29 JULY - 04 AUGUST) 
MUFS: Near predicted monthly values to 30% depressed. Lower
  latitudes more likely to experience periods of depressions.
  Possible enhancments in MUFs on 31 July/1 August.
Propagation conditions: Fair to normal. No SWFs
T index:   0

3. OUTLOOK (05 AUGUST - 04 SEPTEMBER)
Degraded HF propagation conditions possible: No significant
  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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