[Ips-whfpr] IPS Weekly Prop. Report (03 August 11)

rwc rwc at ips.gov.au
Wed Aug 3 12:38:45 EST 2011 

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 03/0200Z AUGUST 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (27 JULY - 02 AUGUST)
Date   T index   Conditions        
27 Jul   39      Fair-normal       
MUFS:
   Cocos Island Region:
      Mostly depressed 10 to 30%.
   Niue Island Region:
      Near predicted monthly values with depressions to 25%
      00-01, 05-09, 11-13 and 20-23 UT.
   Northern Australian Region:
      Mostly 15-35% depressed at Darwin. Near predicted
      monthly values with depressions to 25% 10-12 UT at
      Townsville. Night spread F observed at Townsville 14-20 UT.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with depressions to 25%
      observed at most stations 06-14 UT. Enhancements to 35%
      16-20 UT. Night spread F observed at Brisbane, Hobart and
      Perth.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Generally weak ionosphere with depressions to 25% 08-10 UT.

28 Jul   39      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to
      35% 11-23 UT.
   Niue Island Region:
      Near predicted monthly values with depressions to
      25% 00-02, 07-09 and 19-23 UT.
   Northern Australian Region:
      Depressed 15-30% 00-18 and 21-22 UT. Near
      predicted monthly values at other times.
   Southern Australian and New Zealand Region:
      Near predicted monthly values with occasional
      depressions to 25% during 03-14 UT. Enhancements
      to 25% observed at Learmonth and Perth 16-21 UT.
      Night spread F observed at Brisbane and Norfolk Is.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values with occasional depressions
      to 35% around 10-13 UT. Weak night ionosphere.

29 Jul   34      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day.
      Depressed by 35% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Depressed by 15% during local day.
      Depressed by 25% 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 15% during local day.
      Depressed by 15% during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 30%.

30 Jul   44      Fair-normal       
MUFS:
   Cocos Island Region:
      Depressed by 25% during local day.
      Depressed by 35% during local night.
      Depressed by 20% after local dawn.
   Niue Island Region:
      Near predicted monthly values during local day.
      Depressed by 25% during local night.
   Northern Australian Region:
      Depressed by 20% during local day.
      Depressed by 25% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 25%.

31 Jul   52      Fair-normal       
MUFS:
   Cocos Island Region:
      Near predicted monthly values with depressions to
      30% 01, 17 and 21-22 UT and to 45% 12-16 and 23 UT.
   Niue Island Region:
      No data.
   Northern Australian Region:
      Near predicted monthly values. Depressions to 30%
      01-03 and 12-18 UT at Darwin. Night spread F observed
      at Darwin and Townsville.
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Enhancements to 35%
      09-20 UT at most stations. Depressions to 20% 12-16 UT
      at Learmonth and 00-12 UT at Hobart. Some night spread
      F observed at most stations. Hobart, no data 14-23 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 25% depressed.

01 Aug   46      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day,
      Depressed by 35% during local night. Spread-F
      13-15UT.
   Niue Island Region:
      No data available.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 25% during local night. Spread-F observed
      Townsville 12-20UT. 
   Southern Australian and New Zealand Region:
      Near predicted monthly values. Hobart evening spread-F
      and periods of sporadic-E conditions 13-19UT. Perth
      spread-F 15-21UT. 
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 40% over the UT day.
      Casey no data available.

02 Aug   45      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values during local day,
      Depressed by 30% during local night.
      Depressed by 35% after local dawn.
   Niue Island Region:
      No data available.
   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.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Depressed by 25% over the UT day.

Predicted Monthly T index for August:  59
2. FORECAST (03 AUGUST - 09 AUGUST) 
MUFS: briefly depressed after local dawn on 5 Aug
MUFs near predicted monthly values on other days.
Propagation conditions: Fair 05-Aug , otherwise normal. SWF's probable early in
week.
T index:  59

3. OUTLOOK (10 AUGUST - 09 SEPTEMBER)
Degraded HF propagation conditions possible:
16-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
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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