[Ips-whfpr] IPS Weekly Prop. Report (23 December 09)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 23/0200Z DECEMBER 2009 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (16 DECEMBER - 22 DECEMBER)
Date   T index   Conditions        
16 Dec  -12      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values. Depressions to 15% 01,
      02 and 16-17 UT.
   Niue Island Region:
      Near predicted monthly values withe depressions to 30%
      00-05 and 19-22 UT.
   Northern Australian Region:
      Near predicted monthly values. Depressions to 35% at
      Darwin 03-06, 08-11 and 16-20 UT. Depressions to 25%
      at Townsville 03-05, 17, 18 UT. Sporadic E observed
      11-12 and 16 UT at Darwin and 16-29 UT at Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Depressions to 30% at
      Brisbane (00-02, 04-06, 11-14 and 18-22 UT), Norfolk Is. 
      (02-05, 09-15 UT) Hobart (21-23 UT) and Christchurch
      (01, 07, 09 and 18-22 UT). Sporadic E observed at
      various times but mostly 00-09 and 15-23 UT, sometimes
      blanketing.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 15% depressed.
      Depressions to 30% at Macquarie Is. 12-16 UT.

17 Dec  -10      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to 15%
      15-20 UT. Sporadic E observed 01-07 and 09 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 40%
      01-06, 13-18 and 21-23 UT. Sporadic E observed 01-07,
      09 UT.
   Northern Australian Region:
      Near predicted monthly values with depressions to 40%
      at Darwin (03-05, 08-20 UT) and Townsville (03-06 UT).
      Sporadic E observed at Darwin (09, 15-19 UT) and
      Townsville (10, 11, 20 UT).
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Depressions to 30% at
      Brisbane and Norfolk Is. 00-07, 23 UT and at Norfolk
      15-18 UT. Depressions to 25% at Canberra and Sydney
      01-08, 22-23 UT. Depressions to 15% at Christchurch
      and Hobart 00-08 UT. Sporadic E observed mostly 00-08
      and 23 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 15% depressed.
      Depressions to 25% at Macquarie Is. 14-16 UT.

18 Dec   -3      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to 20%
      16-22 UT and enhancements to 30% 05-11 UT. Sporadic E
      observed 00-03, 09-13 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 35%
      00-07 and 13-18 UT. Sporadic E observed 05-09, 13 and
      18 UT.
   Northern Australian Region:
      Near predicted monthly values. Depressions to 20% at
      Darwin 08, 09, 15, 16 UT and to 35% at Townsville
      00-06 UT. Sporadic E observed at Darwin 00, 03, 05-09,
      15 and 20 UT and at Townsville 01, 03-10 and 21-22 UT.
      Night spread F observed at Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with depressions to 30%
      mostly between 00-07 UT and 19-20 UT (Christchurch)
      and 14-16 UT (Norfolk). Sporadic E observed mostly
      during daytime.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 25% depressed.

19 Dec   -5      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to 15%
      12, 17 and 18 UT. Spread F 17-21 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 40%
      00-06, 11-13, 16-18 and 20 UT. Night spread F. Sporadic
      E observed 02, 04-10, 14, 15, 18 UT.
   Northern Australian Region:
      Darwin: near predicted monthly values with depressions
      to 20% 08-18 UT and enhancments to 25% 01-05 UT. Spread
      F 16-20 UT. 
      Townsville: near predicted monthly values with
      depressions to 25% 05 and 19 UT. Enhancments to 40% 02,
      06-08 and 14-15 UT. Sporadic E observed 00 and 15-18 UT
      and some morning spread F.
   Southern Australian and New Zealand Region:
      Brisbane: near predicted monthly values with depressions
      to 15% 01-05 UT and to 30% 15-18 UT. Sporadic E 03-11,
      15-18, 21-23 UT. Some night spread F.
      Norfolk Is.: near predicted monthly values with
      depressions to 40% 03-05 and 15-18 UT. Sporadic E
      observed 00-02 and 16-18, 22, 23 UT. Some night spread F.
      Canberra/Sydney: Near predicted monthly values with
      depressions to 15% 01-04, 06-08 UT. Enhancements to 25%
      00, 19-20 UT. Sporadic E observed at 00-03, 08-12,
      and 14-18 UT. 
      Hobart: near predicted monthly values with depressions to
      15% 00-02, 06-09 UT. Sporadic E observed 00-03 UT.
      Christchurch: near predicted monthly values with
      depressions to 15% 00-07, 21 UT. Some night spread F.
      Sporadic E 02-08, 19-20, 22, 23 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with occasional
      depressions to 20%. Sporadic E observed 00-03 and
      14-19 UT at Macquarie Is. and 00, 09-20 UT at Casey.

20 Dec   -3      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values. Night spread F 16-21
      UT. Sporadic E observed 00-02 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 20%
      00-03 and 19-21 UT. Some night spread F. Sporadic E
      observed 00-01 and 20-23 UT.
   Northern Australian Region:
      Near predicted monthly values. Enhancements to 20%
      00-04 UT and depressions to 30% 07-10 and 16-20 UT at
      Darwin and 04-05 and 17-19 UT at Townsville. Sporadic
      E observed at Darwin 18-19 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with occasional
      depressions to 15%. Sporadic E observed mostly 00-06
      and 17-23 UT, although observed 09-17 UT at Hobart.
      Some night spread F observed at Brisbane.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with depressions to 20%
      00-18 UT at Davis and 14-16 UT at Macquarie Is.

21 Dec    7      Normal-fair       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with periods of depressions and
degradations.
   Niue Island Region:
      Mostly near predicted monthly values,
      Depressed by 25% after local dawn with periods of degradations.
   Northern Australian Region:
      Near predicted monthly values with periods of degradations.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with periods of degradations.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day with periods of depressions
and
      degradations.

22 Dec    2      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day,
      Enhanced by 25% during local night.
   Niue Island 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.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day with
      periods of degradations.

Predicted Monthly T index for December:   1
2. FORECAST (23 DECEMBER - 29 DECEMBER) 
MUFS: MUFs near predicted monthly values.
Propagation conditions: Normal. No SWFs
T index:   1

3. OUTLOOK (30 DECEMBER - 29 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
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