[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 04/31
ISSUED AT 25/2341Z JULY 2004
BY THE AUSTRALIAN SPACE FORECAST CENTRE.


DEPRESSED/DEGRADED HF PROPAGATION CONDITIONS OBSERVED AFTER
LOCAL DAWN THIS MORNING FOR SOUTHERN AUS/NZ REGION. DEPRESSED 
CONDITIONS EXPECTED TO CONTINUE TODAY. NORTHERN AUS REGION
MUFS EXPECTED TO BE ONLY MILDLY AFFECTED. ALSO A SOLAR PROTON
EVENT IS IN PROGRESS IMPACTING TRANS-POLAR HF COMMS.

26 JULY 2004
HF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
26 Jul:  Low to moderate      Possible             

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
       SOUTHERN                    FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
26 Jul   -10     -25%         2  4  6  8  8 12 16 16 


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