[Ips-dhfpr] IPS Daily HF Prop Report - 12 May 03

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 12/2330Z MAY 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (12 MAY) 
Date   T index  Conditions    
12 May    47    Fair-normal    

Flares: none.

MUFs:
   Equatorial PNG Region:
      Enhanced by 25%.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Depressed by 20% during local night.
   Antarctic Region (Casey/Scott Base):
      Depressed by 20% over the UT day.
      Spread F observed.


PCA Event : No event.

Predicted Monthly T index for May:  72
2. FORECAST (13 MAY - 15 MAY)
Date   T index  Conditions       MUFs                              
13 May    50    Fair             depressed 10 to 15% (south Aus)
13 May    70    Normal           near predicted monthly values (North Aus)
14 May    50    Fair             depressed 10 to 15% (south Aus)    
14 May    70    Normal           near predicted monthly values (North Aus)
15 May    80    Normal-Fair      Near predicted monthly values    
COMMENT: IPS HF Communications Warning 37 was issued on 11 May 
and is current for interval 12-14 May. Southern Aus/NZ region 
MUFs depressed 15% after local dawn this morning. Northern Aus 
region MUFs again appear unaffected. Southern Aus/NZ region MUFs 
may be lower than normal over next two days, due to geomagnetic 
activity from coronal hole high speed wind stream. Also, increasing 
chance of shortwave fadeouts in coming days due to possible return 
of a previously flare-active solar region. 

IPS Radio and Space Services      | email: asfc at ips.gov.au
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Haymarket NSW 1240  AUSTRALIA     | FTP: ftp://ftp.ips.gov.au 
tel: +61 2 9213 8010              | fax: +61 2 9213 8060 

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