[Ips-whfpr] IPS Weekly Prop. Report (15 December 10)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 15/0200Z DECEMBER 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (08 DECEMBER - 14 DECEMBER)
Date   T index   Conditions        
08 Dec   13      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Niue Island Region:
      Enhanced by 15% during local day.
      Near predicted monthly values during local night.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day.
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 20% over the UT day.

09 Dec    8      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Mostly near predicted monthly values.
   Northern Australian Region:
      Mostly near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 15% over the UT day.

10 Dec   20      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values. Depressions to 30%
      17-22 UT.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressions to 35% 05-20 UT.
   Northern Australian Region:
      Enhanced by 15% during local day.
      Variable conditions 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.

11 Dec   18      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Near predicted monthly values with depressions to
      30% 18-21 UT.
   Northern Australian Region:
      Near predicted monthly values with depressions to
      25% 00-02, 23 UT.
   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.

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

13 Dec   27      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values.
   Niue Island Region:
      Enhanced by 35% 00-15 UT then near predicted monthly
      values.
   Northern Australian Region:
      Near predicted monthly values with depressions to 30%
      00-01, 19-23 UT at Darwin and 23 UT at Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Occasional depressions
      to 20%.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with depressions to 20%
      at times.

14 Dec   27      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values. No data 16-22 UT.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Depressions to 30% 00-03 and 20-22 UT. Enhancements
      to 25% 11-18 UT and near predicted monthly values at
      other times at Darwin. Near predicted monthly values
      at Townsville with enhancments to 25% 05-08 and 18-19
      UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Depressions to 25%
      observed after 17 UT at most stations.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 20% depressed.

Predicted Monthly T index for December:  34

2. FORECAST (15 DECEMBER - 21 DECEMBER) 
MUFS: Near predicted monthly values to 25% depressed.
Propagation conditions: Fair to normal. No SWFs. Summertime
sporadic E may disrupt/degrade communications.
T index:  20
COMMENT: IPS HF Communications Warning 31 was issued on 14
December and is current for interval  15 December only. 
3. OUTLOOK (22 DECEMBER - 21 JANUARY)
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
PO Box 1386                         WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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