[Ips-whfpr] IPS Weekly Prop. Report (27 June 07)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 27/0200Z JUNE 2007 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (20 JUNE - 26 JUNE)
Date   T index   Conditions        
20 Jun    6      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 20% 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 35% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly near predicted monthly values.

21 Jun    4      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Depressed by 25%.
   Northern Australian Region:
      Depressed by 20% 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 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly near predicted monthly values.

22 Jun   12      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values.
   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):
      Mostly near predicted monthly values.
      Degraded conditions observed at times due to
      sporadic E and/or spread F conditions.

23 Jun    5      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values 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.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly near predicted monthly values.
      Degraded conditions observed at times due to
      sporadic E and/or spread F conditions and/or
      a weak winter solar mininum ionosphere.

24 Jun    6      Normal            
MUFS:
   Equatorial PNG/Niue Region:
      Depressed by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Depressed by 10% 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):
      Mostly near predicted monthly values to 15% depressed
      at times.

25 Jun    4      Fair              
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values with occasional
      depressions to 30%.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 20% depressed.

26 Jun   -2      Normal-fair       
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted values to 20% depressed. Night time
      spread F observed. At Vanimo, MUFS were depressed
      20-50% 00-13 UT with sporadic E obscuring the F region
      from 14-20 UT.
   Northern Australian Region:
      Near predicted values to 20% depressed. Night time
      spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted values to 15% depressed with night
      time spread F.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with spread F and night
      time sporadic E.

Predicted Monthly T index for June:   9
2. FORECAST (27 JUNE - 03 JULY) 
MUFS: MUFs mostly near predicted monthly values although
      depressions to 25% likely at times.
Propagation conditions: Fair to normal. Winter hemisphere
      communications likely to be degraded, particularly
      at night, due to spread F.
T index:   5

3. OUTLOOK (04 JULY - 03 AUGUST)
Degraded HF propagation conditions possible:
No large depressions expected in MUFs. Degradations in
communications on night time circuits likely due to spread
F.
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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