[Ips-wsgr] IPS Weekly Solar and Geophysical Report (25 December 09)

[rwc]

SUBJ: IPS WEEKLY SOLAR AND GEOPHYSICAL REPORT 
ISSUED ON 25 DECEMBER 2009, BY IPS RADIO AND SPACE SERVICES,
FROM THE AUSTRALIAN SPACE FORECAST CENTRE

1. SUMMARY (18 DECEMBER - 24 DECEMBER)
Date     18    19    20    21    22    23    24
10cm     84    82    84    83    82    78    77
AFr       2     0     2     1     2     3 (  1)
Aaus      5     3     4     5     3     5 (  3)
T        -3    -5    -3     7     2     3    -4

Solar:        Solar flare activity
Geomagnetic:  Geomagnetic activity observed for Australian region.
Frequencies:  Australian ionospheric F2 critical frequencies

18 Dec 
Solar:        low
Geomagnetic:  Quiet to unsettled 
Frequencies:  
   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 
Solar:        low
Geomagnetic:  Quiet 
Frequencies:  
   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 
Solar:        very low
Geomagnetic:  Quiet 
Frequencies:  
   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 
Solar:        low
Geomagnetic:  Mostly quiet, isolated unsettled periods at high 
              latitudes. 
Frequencies:  
   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 
Solar:        low
Geomagnetic:  Quiet 
Frequencies:  
   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.

23 Dec 
Solar:        low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day,
      Enhanced by 15% during local night.
   Niue Island Region:
      Near predicted monthly values during local day,
      No data available during local night.
   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):
      Near predicted monthly values over the UT day with
      periods of degradations

24 Dec 
Solar:        very low
Geomagnetic:  Quiet 
Frequencies:  
   Cocos Island Region:
      Near predicted monthly values during local day,
      Enhanced by 35% during local night.
   Niue Island 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):
      Near predicted monthly values over the UT day.

 
2. FORECAST (25 DECEMBER - 31 DECEMBER)
Solar: 
Very low
Geomagnetic:  
Mostly quiet conditions.

Frequencies:  
MUFs near predicted monthly values.

For an explanation of some of the terms in this report, go to
http://www.ips.gov.au/1/2/1.

IPS Radio and Space Services        email: asfc at ips.gov.au
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