[Ips-whfpr] IPS Weekly Prop. Report (30 April 03)

[rwc]

SUBJ: IPS WEEKLY HF PROPAGATION REPORT
ISSUED AT 30/0200Z APRIL 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST
1. SUMMARY (23 APRIL - 29 APRIL)
Date   T index   Conditions        
23 Apr   90      Normal-fair       
MUFS:
   Equatorial PNG Region:
      Mostly near predicted monthly values,
      Enhanced by 50% after local dawn.
   Northern Australian Region:
      Enhanced 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):
      Near predicted monthly values over the UT day
      with periods of depressions and degradations.

24 Apr   81      Normal            
MUFS:
   Equatorial PNG Region:
      Mostly near predicted monthly values,
      Enhanced by 35% after local dawn.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Enhanced by 20% after local dawn.
   Southern Australian and New Zealand Region:
      Mostly near predicted monthly values,
      Depressed by 25% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day
      with periods of mild to moderate depressions
      and degradations.

25 Apr   75      Fair-normal       
MUFS:
   Equatorial PNG Region:
      Mostly near predicted monthly values,
   Northern Australian Region:
      Enhanced by 15% during local day,
      Near predicted monthly values during local night.
   Southern Australian and New Zealand Region:
      Depressed by 15% during local day,
      Near predicted monthly values during local night.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day
      with periods of significant depressions and
      degradations.

26 Apr   78      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Near predicted monthly values during local night.
   Northern Australian Region:
      Enhanced by 15% during local day,
      Enhanced by 15% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.

27 Apr   78      Normal            
MUFS:
   Equatorial PNG Region:
      Near predicted monthly values.
   Northern Australian Region:
      Near predicted monthly values.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day
      with periods of depressions and degradations.

28 Apr  100      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 25% during local night.
   Northern Australian Region:
      Enhanced 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):
      Near predicted monthly values over the UT day 
      with periods of depressions and degradations.

29 Apr   94      Normal            
MUFS:
   Equatorial PNG Region:
      Enhanced by 20% during local day,
      Enhanced by 20% during local night.
      Enhanced by 45% after local dawn.
   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):
      Near predicted monthly values over the UT day
      with periods of deppressions and degradations. 


Predicted Monthly T index for April:  77
2. FORECAST (30 APRIL - 06 MAY) 
MUFS: normal/depressed 5% on 30-Apr, depressed 5 to 10% on
01 and 02-May, normal/mildy depressed on 03-May,  otherwise 
MUFs near normal. SWFs probable early in week.

Propagation conditions: Mostly normal in Northern AUS 
regions/Normal to fair in Southern AUS regions on 30-Apr, 
mostly normal to fair in most AUS regions on 01 and 02-May. 
Occassional fair to poor conditions possible in Southern 
AUS regions on 01 and 02-May. Otherwise conditions near 
normal. SWfs probable early in week.  

T index:   90

COMMENT: IPS HF Communications Warning 31 was issued on 
30 April and is current for interval 30 April to 2 May. 
3. OUTLOOK (07 MAY - 06 JUNE)
Degraded HF propagation conditions possible:
07 to 16-May, 20 to 29-May, 01 to 06-June.

PLEASE NOTE:
At this time of the solar cycle, space weather conditions
are frequently determined by short timescale events, not
able to be forecasted a week in advance.

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