[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 03/19
ISSUED AT 14/2212Z MARCH 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

OVERNIGHT GEOMAGNETIC ACTIVITY OBSERVED DUE TO 
A CORONAL HOLE HIGH SPEED WIND STREAM.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR EARLY 15 MARCH 2003 SOUTHERN AUS/NZ REGION ONLY.

NORTHERN AUS REGION HF COMMUNICATORS SHOULD USE A TINDEX
OF 120. NORTHERN REGION MUFS NOT AFFECTED BY OVERNIGHT
ACTIVITY.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
FOLLOW ON HF WARNING FROM HF WARNING: 18
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
15 Mar:  low                  None expected        

HF COMMUNICATIONS FORECAST (SOUTHERN AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
15 Mar   85    -15%/normal    2  4  6  8 12 12 16 22 


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