[Ips-dhfpr] IPS Daily HF Prop Report - 09 May 03

rwc rwc at ips.gov.au
Sat May 10 08:36:41 EST 2003


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 09/2330Z MAY 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (09 MAY) 
Date   T index  Conditions    
09 May    63    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG 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:
      15% depressed.
   Antarctic Region (Casey/Scott Base):
      15% depressed to near normal.
      Spread F observed.


PCA Event : No event.

Predicted Monthly T index for May:  72
2. FORECAST (10 MAY - 12 MAY)
Date   T index  Conditions       MUFs                              
10 May    35    Fair             depressed 10 to 20% (southern Aus region)
10 May    70    Normal           near predicted monthly values (North Aus region)
11 May    75    Normal-Fair      Near predicted monthly values     
12 May    60    Fair             near predicted monthly values/depressed 10 to 15%    
COMMENT: IPS HF Communications Warning 35 was issued on 9 May 
and is current for interval 10 May only. Southern Aus/NZ region 
MUFs again depressed 15% yesterday. Degraded HF conditions local 
night due to unexpected geomagnetic activity following shock/impulse 
arrival. Further depressions probable southern region after local 
dawn this morning. Northern Aus region MUFs again appear unaffected. 
HF conditions may briefly improve later today, before returning 
degraded due to second arm of coronal hole high speed wind stream. 

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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