[Ips-hf-warning] IPS HF COMMS WARNING

rwc rwc at ips.gov.au
Tue May 31 08:44:38 EST 2005


SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 05/25
ISSUED AT 30/2240Z MAY 2005
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

DEPRESSED AND DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR FIRST HALF OF 31 MAY 2005. SOUTHERN AUS/NZ REGION ONLY.

NORTHERN AUS REGION MUFS CURRENTLY NEAR TO ABOVE PREDICTED
MONTHLY VALUES. HF COMMUNICATORS NORTH OF SYDNEY SHOULD
USE A T INDEX OF 40.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
FOLLOW ON HF WARNING FROM HF WARNING: 24
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
31 May:  low                  None expected        

HF COMMUNICATIONS FORECAST (SOUTHERN AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
31 May   -10    20%           2  4  6  8  8 12 16 16 


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