[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 03/11
ISSUED AT 17/0545Z FEBRUARY 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 17-18 FEBRUARY 2003

IONOSPHERIC DEPRESSIONS OF 20-30% HAVE BEEN OBSERVED AT 
MID-LATITUDES IN E.AUS/NZ REGIONS ONLY. DEPRESSIONS LIKELY 
TO PERSIST DURING LOCAL DAYLIGHT HOURS. 

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
17 Feb:  low                  None expected        
18 Feb:  low                  None expected        

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
17 Feb   23    -25%           2  4  6  8  8 12 16 16 
18 Feb   23    -25%           2  4  6  8  8 12 16 16 


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