23 December 2016

ICAO METARs TAFs sent over MIL 188-141 2G-ALE


This MIL 188-141 2G-ALE session  has been copied today 23 Dec. on 09019.0 KHz/USB starting from 1010 UTC. The ALE addresses are:  XSS, RAF base in Forest Moor UK belonging to DHFCS-net (Defense High Frequency Communication Service) and UKE304, RAF E3D AWACS Aircraft: respectively TAZ and NATO35 callsigns. The Comms  are conveyed by AMD commands which are embedded in 188-141. After the handshake, this is the first message sent by the Awacs, requesting METARs and TAFs (weather informations) for some airports in Cyprus identified by LCRA LCLK, and  LCPH:

LCRA - AKROTIRI 
LCLK - LARNACA/LARNAX 
LCPH - PAPHOS/BAF

TAZ DE NATO35 HELLO WE R RQSTING METARS N TAFS FP LCRA LCLK LCPH TVM
followed by the reply from ground:

DE TAZ WAIT ONE
something like "wait a moment..." then the requested weather informations for LCRA, LCLK, and LCPH are sent by TAZ (XSS)

LCRA 230850Z 14003KT 9999 6000E -SHRA SCT022CB BKN045 13/10 Q1019 BECMG 9999 FEW022CB
TAF LCRA 230732Z 2309/2403 09005KT 9999 BKN050 PROB 303
TEMPO 2309/2403 5000 TSRA SCT022CB

LCLK 230930Z 08007KT 9999 FEW020TCU 15/11 Q1020 NOSIG
TAF LCLK 230530Z 2306/2406 04008KT 9999 SCT020 BKN040 PROB40
TEMPO 2306/2406 5000 SHRA PROB330
TEMPO 2306/2406 VRB20G30KT 2000 TSRA SCT020CB
BECMG 2309/2312 21010KT
BECMG 2316/2319 33007KT


LCPH 230930Z 07006KT 9999 FEW0bkX30TCU SCT050 15/09 Q1019
TAF LCPH 230530Z 2306/2406 07008KT 9999 SCT020 BKN040 PROB40
TEMPO 2306/22406 5000 SHRAPROB30
TEMPO 2306/2406 VRB20G30KT 2000 TSRA SCT020CB
BECMG 2308/2311 24010KT
BECMG 2316/2319 03007KT

Transmission is terminated by:
THATS THE WX COMPLETED K


METAR (METeorological Air Report) is a format for reporting weather information which is predominantly used by pilots in fulfillment of a part of a pre-flight weather briefing, and by meteorologists, who use aggregated METAR information to assist in weather forecasting. METAR is a common format and highly standardized through the International Civil Aviation Organization (ICAO) which allows it to be understood throughout most of the world.
A typical METAR contains data for the temperature, dew point, wind speed and direction, precipitation, cloud cover and heights, visibility, and barometric pressure. A METAR may also contain information on precipitation amounts, lightning, and other information that would be of interest to pilots or meteorologists such as a pilot report or PIREP, colour states and runway visual range (RVR). TAF (Terminal Aerodrome Forecast) complement and use similar encoding to METAR reports.
TAFs are produced by a human forecaster based on the ground. For this reason there are considerably fewer TAF locations than there are airports for which METARs are available. (quoted from Wikipedia)