[Ips-whfpr] IPS Weekly Prop. Report (06 April 11)

Wed Apr 6 14:25:16 EST 2011

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 06/0200Z APRIL 2011 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (30 MARCH - 05 APRIL)
Date   T index   Conditions        
30 Mar   83      Normal            
MUFS:

  Cocos Island Region:
      Near predicted monthly values from 00UT to 05UT and 21UT.
      Enhanced by 50% at other times.
   Niue Island Region:
      Near predicted to 25% enhanced.  
   Northern Australian Region:
      Mostly near predicted to enhanced about 50%. 
   Southern Australian and New Zealand Region:
      Near predicted to 35% enhanced. 
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values to 35% enhanced.

31 Mar   90      Normal            
MUFS:
about 25% above predicted monthly values

01 Apr   86      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values 00-07, 18-20 UT,
      enhanced to 40% at other times.
   Niue Island Region:
      Near predicted monthly values 00-03, 19-20 UT,
      enhanced to 40% at other times.
   Northern Australian Region:
      Near predicted monthly values 00-07, 18-21 UT,
      enhanced to 35% at other times
   Southern Australian and New Zealand Region:
      Near predicted monthly values 00-07 UT at all stations
      except Perth and 20-22 UT Canberra and Sydney. Enhanced
      to 35% at other times.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhanced to 35% at Macquarie Is and Mawson. Near
      predicted monthly values to 30% depressed at Casey and
      Scott Base.

02 Apr   89      Normal            
MUFS:
   Cocos Island Region:
      Near predicted monthly values to 25% enhanced.
      Enhanced to 35% 20-22 UT.
   Niue Island Region:
      Near predicted monthly values with enhancements to 35%
      01-11 and 16-19 UT.
   Northern Australian Region:
      Near predicted monthly values with enhancements to 30%
      05-15 and 19-23 UT.
   Southern Australian and New Zealand Region:
      Enhanced to 35% apart from near predicted monthly
      values at Hobart and Perth 00-07 and 15-20 UT. Spread
      F observed at Hobart and Perth 11-21 UT.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Enhancements to 30% at Macquarie Is and depressions to
      30% at other stations.

03 Apr   94      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 15-30% from 02-11UT.
      Enhanced by 30-55% from 11-20UT.
      Near predicted values at other times.
   Niue Island Region:
      Near predicted monthly values during local day,
      Enhanced by 15-30% from 03-14UT.
      Enhanced by 25-40% from 14-20UT.
      Near predicted values at other times.
   Northern Australian Region:
      Enhanced by up to 50% from 05-14UT.
      Near predicted values at other times.
   Southern Australian and New Zealand Region:
      Enhanced by up to 45% from 04-13UT.
      Near predicted values at other times.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Mostly near predicted values to depressed by 20%.

04 Apr   94      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 25% during local day,
      Enhanced by 45% during local night.
      Near predicted monthly values after local dawn.
   Niue Island Region:
      Enhanced by 25% during local day,
      Enhanced by 20% during local night.
   Northern Australian Region:
      Enhanced by 20% during local day,
      Enhanced by 40% during local night.
      Enhanced by 25% after local dawn.
   Southern Australian and New Zealand Region:
      Enhanced by 30% during local day,
      Near predicted values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted to depressed by 20% over the UT day.

05 Apr   83      Normal            
MUFS:
   Cocos Island Region:
      Enhanced by 20% during local day,
      Enhanced by 35% during local night.
   Niue Island Region:
      Enhanced by 65% during local day,
      Enhanced by 25% during local night.
   Northern Australian Region:
      Enhanced by 20%,
   Southern Australian and New Zealand Region:
      Enhanced by 25% during local day,
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base/Davis/Mawson):
      Near predicted monthly values over the UT day.

Predicted Monthly T index for April:  44
2. FORECAST (06 APRIL - 12 APRIL) 
MUFS: MUFs near predicted monthly values. Possible 10-20% depressions
from 9th April - 12 April.
Propagation conditions: Normal to fair April 9 - 12. Normal at other times.
SWFs possible.
T index:  April 6-8 70, April 9-12 25 

3. OUTLOOK (13 APRIL - 13 MAY)
Degraded HF propagation conditions expected between April 29 - May 1 and
between May 5 - May 7. Otherwise no major significant 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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