[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 03/49
ISSUED AT 18/2251Z JUNE 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

GEOMAGNETIC ACTIVITY OBSERVED OVERNIGHT.

DEPRESSED/DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR 19 JUNE 2003 SOUTHERN AUS/NZ REGION ONLY. CONDITIONS
MAY IMPROVE AS DAY PROGRESSES.

NORTHERN AUS REGION MUFS NEAR PREDICTED MONTHLY VALUES.
NORTHERN AUS HF COMMUNICATORS SHOULD USE A T INDEX OF 65.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
FOLLOW ON HF WARNING FROM HF WARNING: 47
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
19 Jun:  moderate to high     Probable             

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


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