[Ips-whfpr] IPS Weekly Prop. Report (21 July 10)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 21/0200Z JULY 2010 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (14 JULY - 20 JULY)
Date   T index   Conditions        
14 Jul    4      Fair-normal       
MUFS:
   Cocos Island Region:
      Mostly 15-30% depressed.
   Niue Island Region:
      Mostly 15-30% depressed. Sporadic E 06-07 UT and night
      spread F observed.
   Northern Australian Region:
      Near predicted monthly values to 30% depressed. Night
      spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Occasional depressions
      to 30%. Night spread F observed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 30% depressed.

15 Jul   22      Fair-normal       
MUFS:
   Cocos Island Region:
      Mostly 15-30% depressed. Sporadic E observed 07-08
      UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 25%
      05-08 UT. Occasional night spread F observed.
   Northern Australian Region:
      Near predicted monthly values with depressions to 30%
      00-01, 06-08 UT; and also at Darwin, 16-19 UT. Night
      spread F observed at Townsville.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values. Enhancements to
      40% observed at all stations except Norfolk Is., 12-19
      UT. Night spread F observed at Brisbane, Hobart and
      Norfolk Is.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to around 05 UT then
      depressed to 30%.

16 Jul   14      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values. Enhancements to 40%
      05-07 UT. Depressions to 30% 11-21 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to 30%
      00, 04, 07-13 and 21-22 UT.
   Northern Australian Region:
      Near predicted monthly values with depressions to 25%
      04-11, 20-21 UT at Darwin. Night spread F observed.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with occasional
      depressions to 25%. Enhanced to 20% 11-19 UT at
      Hobart, Norfolk Is. and Sydney. Night spread F
      observed.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with occasional
      depressions to 30%.

17 Jul   10      Fair-normal       
MUFS:
   Cocos Island Region:
      Mostly 15-35% depressed.
   Niue Island Region:
      Mostly 15-30% depressed. Sporadic E observed 13-17 UT
      and some night spread F.
   Northern Australian Region:
      Mostly 10-25% depressed. Sporadic E observed at Darwin
      09-21 UT and Townsville 07-12 UT. Spread F observed at
      Townsville 13-20 UT.
   Southern Australian and New Zealand Region:
      Mostly 20% depressed 00-07 UT, then near predicted
      monthly values to 20% enhanced. Night spread F
      observed at all stations.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with occasional
      depressions to 20%.

18 Jul   10      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values to 20% enhanced 04-07
      and 11-13 UT. Depressions to 25% at other times.
      Sporadic E observed 14-17 UT.
   Niue Island Region:
      Mostly 10-30% depressed.
   Northern Australian Region:
      Mostly 10-25% depressed. Spread F observed 14-20 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values to 20% depressed. Spread
      observed during night time.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 20% depressed.

19 Jul   15      Normal            
MUFS:
   Cocos Island Region:
      Depressed by 20% during local day,
      Depressed by 25% during local night.
   Niue Island Region:
      Near predicted monthly values.
   Northern Australian Region:
      Depressed by 15% 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):
      Near predicted monthly values over the UT day.

20 Jul   16      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Niue Island Region:
      Depressed by 20% during local day,
      Near predicted monthly values 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.

Predicted Monthly T index for July:  27
2. FORECAST (21 JULY - 27 JULY) 
MUFS: MUFs near predicted monthly values.
Propagation conditions: Normal. No SWFs
T index:  27

3. OUTLOOK (28 JULY - 27 AUGUST)
Degraded HF propagation conditions possible:
19-Aug,23-Aug.

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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