[Ips-dhfpr] IPS Daily HF Prop Report - 25 September 01

[rwc]

SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 25/2330Z SEPTEMBER 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (25 SEPTEMBER) 
Date   T index  Conditions    
25 Sep   150    Normal         

Flares    Max     Fadeout    Freq.  Sectors
 M7/1N    0440UT  confirmed  lower  E. Asia/Aust.
 M2/1N    1027UT  possible   lower  European
 M1/SF    0148UT  confirmed  lower  E. Asia/Aust.

MUFs:
   Equatorial PNG Region:
      Enhanced by 20%.
   Australian and New Zealand Region:
      Near predicted monthly values during local day,
      Enhanced greater than 20% during local night.
   Antarctic Region (Casey/Scott Base):
      Significantly degraded due to PCA event.


Predicted Monthly T index for September: 108
2. FORECAST (26 SEPTEMBER - 28 SEPTEMBER)
Date   T index  Conditions       MUFs                              
26 Sep    70    Poor             20 to 40% below predicted monthly 
                                 values 
27 Sep   100    Fair-Poor        depressed 10 to 20%/near predicted 
                                 monthly values     
28 Sep   115    Normal           Near predicted monthly values    
COMMENT: IPS HF Communications Warning 50 was issued on 25 September 
and is current for interval 26-27 September. Significantly degraded 
HF conditions have been observed at high lats since approximately 
16UT on 24 September due to a PCA event and are expected to continue 
to be degraded for the next couple of days. Mid-low latitudes 
are expected to become significantly degraded for 26-27 September 
as the result of significant geomagnetic activity. Fadeouts can 
be expected on daylight HF circuits. 

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