[Ips-dhfpr] IPS Daily HF Prop Report - 29 July 03

rwc rwc at ips.gov.au
Wed Jul 30 09:52:21 EST 2003


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 29/2330Z JULY 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (29 JULY) 
Date   T index  Conditions    
29 Jul    63    Normal-fair    

Flares    Max     Fadeout    Freq.  Sectors
M1.3/1F    0139UT  possible   lower  E. Asia/Aust.

MUFs:
   Equatorial PNG Region:
      Near predicted monthly values during local day,
      Enhanced by 10-30% during local night.
   Northern Australian Region:
      Mostly near predicted monthly values,
      Mild depressions after local dawn.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Extended periods of disturbance.


PCA Event : No event.

Predicted Monthly T index for July:  63
2. FORECAST (30 JULY - 01 AUGUST)
Date   T index  Conditions       MUFs                              
30 Jul    60    Fair-Poor        near predicted monthly values/depressed 
                                 10 to 20% 
31 Jul    60    Fair             Near predicted monthly values 
                                 with periods of disturbance 
                                 at high latitudes.     
01 Aug    70    Normal-Fair      Near predicted monthly values 
                                 with periods of disturbance 
                                 at high latitudes.    
COMMENT: Equatorial spread-F observed local evening hours. Daytime 
spread-F observed Antarctic regions. Periods of strong absorption 
observed S. Ocean with isolated periods of mild absorption in 
Antarctic region, local night hours. Mild depressions observed 
at low latitudes after local dawn today. Expect periods of ionospheric 
depression at mid to high latitudes for the next few days in 
association with coronal hole induced geomagnetic disturbance. 

IPS Radio and Space Services      | email: asfc at ips.gov.au
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