[Ips-dhfpr] IPS Daily HF Prop Report - 18 November 03

rwc rwc at ips.gov.au
Wed Nov 19 10:57:35 EST 2003


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 18/2330Z NOVEMBER 2003 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (18 NOVEMBER) 
Date   T index  Conditions    
18 Nov    53    Fair-normal    

Flares    Max     Fadeout    Freq.  Sectors
 M3/2N    0752UT  possible   lower  Mid East/Indian
 M4/--    1011UT  possible   lower  European

MUFs:
   Equatorial PNG Region:
      Enhanced by 15% during local day,
      Enhanced by 20% during local night.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 30% during local night.
   Southern Australian and New Zealand Region:
      Near predicted monthly values.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day,
      with extended local periods of disturbance.


PCA Event : No event.

Predicted Monthly T index for November:  52
2. FORECAST (19 NOVEMBER - 21 NOVEMBER)
Date   T index  Conditions       MUFs                              
19 Nov    50    Fair             near predicted monthly values/depressed 
                                 5 to 10% 
20 Nov    35    Poor             about 20% below predicted monthly 
                                 values     
21 Nov    50    Fair             depressed 10 to 20%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 88 was issued on 18 November 
and is current for interval 19-21 November (SWFs) . Generally 
improving HF conditions observed at all latitudes as geomagnetic 
disturbance due to coronal hole wind stream subsides. Expect 
continuing periods of disturbance at high latitudes today. There 
is a good possibility of degraded conditions on day two due to 
anticipated geomagnetic disturbance associated with a full halo 
CME observed early today. 

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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