[Ips-dhfpr] IPS Daily HF Prop Report - 27 June 03

rwc rwc at ips.gov.au
Sat Jun 28 08:19:49 EST 2003


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 27/2330Z JUNE 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (27 JUNE) 
Date   T index  Conditions    
27 Jun    92    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 40% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Depressed by 40% after local dawn.
   Southern Australian and New Zealand Region:
      Enhanced by 15% during local day,
      Enhanced by 15% during local night.
      Spread F observed local night hours.
   Antarctic Region (Casey/Scott Base):
      Enhanced by 15% over the UT day.
      Some spreead F observed.


PCA Event : No event.

Predicted Monthly T index for June:  68
2. FORECAST (28 JUNE - 30 JUNE)
Date   T index  Conditions       MUFs                              
28 Jun    80    Normal           near predicted monthly values (north Aus)
28 Jun    60    Fair             depressed 10 to 15%, then normal (south Aus/NZ)
29 Jun    70    Fair/Normal      depressed 10 to 15%/near predicted 
                                 monthly values     
30 Jun    70    Fair/Normal      depressed 10 to 15%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 50 was issued on 26 June 
and is current for interval 27-29 June. Degraded HF comms quality 
observed local night hours at some southern region sites last 
night. Mild depressions possible after local dawn this morning 
southern Aus/NZ region. A generally degraded interval is over 
the next few days for southern Aus/NZ region due to solar coronal 
hole high speed wind stream. Northern Aus region MUFs expected 
to again be near to 15% above predicted monthly values. Also, 
shortwave fadeout activity may increase over next few days, due 
to likelyhood of previously active solar region rotating onto 
solar disk. 

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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