[Ips-hf-warning] IPS HF COMMS WARNING

[rwc]

SUBJ: IPS HF RADIO COMMUNICATIONS WARNING 01/31
ISSUED AT 12/2314Z MAY 2001
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

RECURRENT GEOMAGNETIC ACTIVITY STRONGER THAN 
EXPECTED. MINOR STORM PERIODS OBSERVED
DURING LOCAL NIGHT HOURS SOUTHERN AUS/NZ
MUFS DEPRESSED 15-20% AFTER LOCAL DAWN THIS
MORNING.

NORTHERN REGION AUS (LOW LATITUDES) MUFS
REMAIN NEAR NORMAL.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FOR MID TO HIGH LATITUDES 13 MAY 2001. CONDITIONS
SHOULD IMPROVE AS DAY PROGRESSES.

IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
FOLLOW ON HF WARNING FROM HF WARNING: ??
-------------------------------------------------------------
SOLAR ACTIVITY FORECAST       HF COMMS FADEOUTS             
13 May:  Low to moderate      Possible             

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
MID TO HIGH LATITUDES ONLY         FREQUENCY BANDS  
       T-index  MUFs          2  4  6  8 12 16 22 26
-------------------------------------------------------------
13 May  100    -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/asfc
Haymarket NSW 1240  AUSTRALIA     | FTP: ftp://ftp.ips.gov.au/users/asfc/ 
tel: +61 2 9213 8010              | fax: +61 2 9213 8060