[Ips-dhfpr] IPS Daily HF Prop Report - 19 March 01

rwc rwc at ips.gov.au
Tue Mar 20 10:25:33 EST 2001


SUBJ: IPS DAILY HF PROPAGATION REPORT
ISSUED AT 19/2330Z MARCH 2001 BY IPS RADIO AND SPACE SERVICES
FROM THE AUSTRALIAN SPACE FORECAST CENTRE
AUSTRALIAN REGION SUMMARY AND FORECAST

1. SUMMARY (19 MARCH) 
Date   T index  Conditions    
19 Mar   153    Normal-fair    

Flares: none.

MUFs:
   Equatorial PNG Region:
      No data.
   Northern Australian Region:
      Near predicted monthly values during local day,
      Enhanced by 20% during local night.
   Southern Australian and New Zealand Region:
      Enhanced by 15% during local day,
      Near predicted monthly values during local night.
      Depressed by 30% after local dawn.
   Antarctic Region (Casey/Scott Base):
      Near predicted monthly values over the UT day.
      Spread F observed.


Predicted Monthly T index for March: 115
2. FORECAST (20 MARCH - 22 MARCH)
Date   T index  Conditions       MUFs                              
20 Mar    70    Fair             depressed 10 to 20%/near predicted 
                                 monthly values. (southern region).
20 Mar   115    Normal           near predicted monthly values.
                                 (Northern region).
21 Mar   130    Normal           near predicted monthly values/depressed 
                                 10 to 15%     
22 Mar   110    Normal-Fair      depressed 10 to 15%/near predicted 
                                 monthly values    
COMMENT: IPS HF Communications Warning 9 was issued on 19 March 
and is current for interval 20 March only. Ionospheric depression 
affecting southern (mid to high latitudes) Aus/NZ only. Depression 
followed overnight geomgnateic activity.  Northern (equatorial) 
communicators should use an T index of 115, as disturbance is not 
of sufficient magnitude to effect MUFs in northern region.


IPS Radio and Space Services      | email: asfc at ips.gov.au
PO Box 1386                       | WWW: http://www.ips.gov.au/asfc
Haymarket NSW 1240  AUSTRALIA     | FTP: ftp://ftp.ips.gov.au/users/asfc/ 
tel: +61 2 9213 8010              | fax: +61 2 9213 8060 




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