[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 03/20
ISSUED AT 16/2218Z MARCH 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

CORONAL HOLE INDUCED GEOMAGNETIC ACTIVITY
HAS BEEN OBSERVED OVER RECENT DAYS.

SOUTHERN AUS/NZ MUFS DEPRESSED 15 TO 20% AFTER
LOCAL DAWN THIS MORNING. NORTHERN AUS REGION
MUFS NEAR TO 15% ABOVE NORMAL. NORTHERN REGION
HF COMMUNICATORS SHOULD USE A T INDEX OF 120.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FIRST HALF 17 MARCH 2003.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND.
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
17 Mar:  low to moderate      Possible             

HF COMMUNICATIONS FORECAST (SOUTHERN AUSTRALIAN/NEW ZEALAND REGION)
 SOUTHERN REGION ONLY               FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
17 Mar   60    -15%/normal    2  4  6  8 12 12 16 22 


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