[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 03/37
ISSUED AT 11/2328Z MAY 2003
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

DEPRESSED AND DEGRADED HF PROPAGATION CONDITIONS 
EXPECTED FOR 12-14 MAY 2003 SOUTHERN AUS REGION ONLY,
PARTICULARLY AFTER LOCAL DAWN. ALSO DEGRADED
HF COMMS QUALITY LIKELY DURING LOCAL NIGHT HOURS.

NORTHERN AUS REGION MUFS ARE EXPECTED TO REMAIN
NEAR PREDICTED MONTHLY VALUES AND COMMUNICATORS
WITHIN THIS REGION SHOUDL USE A T INDEX OF 70.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
FOLLOW ON HF WARNING FROM HF WARNING: 36
_____________________________________________________________

SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
12 May:  low to moderate      Possible             
13 May:  low to moderate      Possible             
14 May:  low to moderate      Possible             

HF COMMUNICATIONS FORECAST (SOUTHERN AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
_____________________________________________________________
12 May   45    -15-20%        2  4  6  8 12 12 16 22 
13 May   50    -15%           2  4  6  8 12 12 16 22 
14 May   50    -15%           2  4  6  8 12 12 16 22 


IPS Radio and Space Services      | email: asfc at ips.gov.au
PO Box 1386                       | WWW: http://www.ips.gov.au
Haymarket NSW 1240  AUSTRALIA     | FTP: ftp://ftp.ips.gov.au 
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