[Ips-whfpr] IPS Weekly Prop. Report (10 December 08)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 10/0200Z DECEMBER 2008 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (03 DECEMBER - 09 DECEMBER)
Date   T index   Conditions        
03 Dec  -35      Fair-normal       
MUFS:
   Equatorial PNG/Niue Region:
      Depressed by 15% during local day,
      Depressed by 30% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

04 Dec  -30      Fair-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 during local day,
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

05 Dec  -27      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 during local day,
      Depressed by 25% during local night.
      Depressed by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

06 Dec  -31      Normal            
MUFS:
   Equatorial PNG/Niue 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:
      Depressed by 20% during local day,
      Near predicted monthly values during local night.
      Depressed by 20% after local dawn.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

07 Dec  -50      Normal-fair       
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
      Depressed by 20% after local dawn.
   Northern Australian Region:
      Depressed by 15% during local day,
      Depressed by 35% during local night.
   Southern Australian and New Zealand Region:
      Depressed by 25% during local day,
      Depressed by 30% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

08 Dec  -31      Normal-fair       
MUFS:
   Equatorial PNG/Niue Region:
      Near predicted monthly values at Vanimo. Frequencies
      at Niue were 15-60% depressed apart from near
      predicted during 01-05 and 16-17 UT. Some night spread
      F observed at Niue.
   Northern Australian Region:
      Near predicted mostly between 04-09 and 16-19 UT.
      Depressions to 30% at other times. At Cocos Is.
      frequencies were 15-50% depressed with frequencies
      near predicted 00-01, 10-11 and 20-22 UT.
   Southern Australian and New Zealand Region:
      Mostly 15 to 30% depressed. Occasional sporadic E,
      blanketing at times.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly near predicted monthly values to 20%
      depressed.

09 Dec  -36      Normal-fair       
MUFS:
   Equatorial PNG/Niue Region:
      Frequencies at Vanimo were near predicted with
      depressions to 30% 10-16 UT. At Niue, frequencies
      were mostly 15-40% depressed with some night spread F.
   Northern Australian Region:
      Near predicted monthly values with depressions to 45%
      mostly 13-22 UT. At Townsville, frequencies mostly
      15-40% depressed with near predicted values 05-09 and
      18-22 UT.
   Southern Australian and New Zealand Region:
      Depressions to 40%. Near predicted monthly values at
      most stations 19-21 UT. Some sporadic E, mostly
      daytime.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values. Depressions to 40%
      observed at Macquarie Is, 12-16 UT.

Predicted Monthly T index for December:   4
2. FORECAST (10 DECEMBER - 16 DECEMBER) 
MUFS: Near predicted to 30% or more depressed. Depressions likely
to be deeper at low and mid latitudes.
Propagation conditions: Normal to fair. No SWFs.
T index: -35
COMMENT: Summertime sporadic E may degrade or disrupt F region
communications.
3. OUTLOOK (17 DECEMBER - 16 JANUARY)
Degraded HF propagation conditions possible:
Degraded conditions likely to continue through this period.

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.


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