[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 01/50
ISSUED AT 25/0206Z SEPTEMBER 2001
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 26-27 SEPTEMBER 2001
DEGRADED HF CONDITIONS ARE EXPECTED FOLLOWING THE IMPACT
OF A LARGE HALO CME DUE EARLY ON 26 SEPTEMBER.
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
-------------------------------------------------------------
SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
26 Sep:  Moderate to high     Probable
27 Sep:  Moderate to high     Probable

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
-------------------------------------------------------------
26 Sep    70     -25%         2  4  6  8  8 12 16 22 
27 Sep   100   -15%/normal    2  4  6  8 12 16 22 26 

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