radiosonde observation

radiosonde

radiosonde balloon

radiosonde transmitter

balloon-borne radiosonde

radiosonde balloon (rabal / RABAL)

radiosonde balloon release

radiosonde balloon wind data

radiosonde station

radiosonde tracking radio direction finder

observation point / observation post (OP)

close observation

command-and-observation post

forward observer (FO), forward observation officer; (artillery) observer / spotter

hostile observation

infrared night vision observation device

observation aircraft (O; obsn acft)

observation facilities

observation flight

observation patrol

observation satellite

observation slit

supervise the observation of armistice conditions

type of observation

United Nations India-Pakistan Observation Mission (UNIPOM)

United Nations Iraq-Kuwait Observation Mission (UNIKOM)

United Nations Observation Group in Lebanon (UNOGIL)

United Nations Yemen Observation Mission (UNYOM)

SLOCTOP (security, location, communication, targeting, observation, and position improvement)

artillery observation post

bilateral observation

bilateral observation point

bilateral observation posts coordinates