[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 03/23
ISSUED AT 20/2256Z MARCH 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
ON 21 MARCH 2003
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND

IONOSPHERIC DEPRESSIONS OF 20-40% OBSERVED AT MID AND HIGH 
LATITUDES OVERNIGHT AND AFTER LOCAL DAWN IN ASSOCIATION WITH 
CORONAL HOLE INDUCED GEOMAGNETIC DISTURBANCE
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
21 Mar:  moderate             Possible             

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
21 Mar   35    -20%           2  4  6  8  8 12 16 16 


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