[Ips-hf-warning] SWS HF COMMS WARNING issued 2354 UT on 28 Oct 2018 [SEC=UNCLASSIFIED]

[rwc]

SUBJ: SWS HF RADIO COMMUNICATIONS WARNING 18/10
ISSUED AT 2353UT/28 OCTOBER 2018
BY THE AUSTRALIAN SPACE FORECAST CENTRE.

Minor to moderate MUF depressions in the equatorial and low latitude 
may be expected for the next three days (UT days 29 to 31 October), 
in particular on the dayside. This is because the ionospheric 
support is currently weak to due to very low levels of ionisation 
radiation from the Sun. High-frequency radio communication users 
are advised to use lower than the predicted monthly frequencies 
over these regions.

DEGRADED HF PROPAGATION CONDITIONS EXPECTED
FROM 29-31 OCTOBER 2018
IF COMMS DIFFICULTIES EXPERIENCED TRY A LOWER FREQUENCY BAND
_____________________________________________________________

HF COMMUNICATIONS FORECAST (AUSTRALIAN/NEW ZEALAND REGION)
                                   FREQUENCY BANDS
       T-index      MUFs        2  4  6  8 12 16 22 26
_____________________________________________________________
29 Oct:  -25          -14%      2  4  6  8 12 12 16 22
30 Oct:  -30          -17%      2  4  6  8  8 12 16 22
31 Oct:  -25          -14%      2  4  6  8 12 12 16 22

Space Weather Services              email: asfc at bom.gov.au
Bureau of Meteorology
PO Box 1386                         WWW: http://www.sws.bom.gov.au
Haymarket NSW 1240  AUSTRALIA       FTP: ftp://ftp-out.sws.bom.gov.au
tel: +61 2 9213 8010                fax: +61 2 9213 8060 

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