To communicate via such a device

any radar that is capable of estimating the position of a target based on the return of a single pulse from a cluster of simultaneous beams

(chemistry) Any radical that also carries an electric charge; typically, the charge and unpaired electron are associated with the same atom.

(chemistry) A negatively charged radical ion.

(chemistry) A positively charged radical ion.

(chemistry) The uncharged radical H₂N^. formally derived from ammonia by removing a hydrogen atom; and any of its derivatives R₂N^.

(chemistry) The uncharged form of an aminoxide derived from hydroxylamines by removal of a proton; their structure is best represented as R₂NO^. <=> R₂N^(.+)-O⁻.

A receive-only radar that uses ambient radio signals for search, tracking, surveillance, identification, guidance and mapping.

The therapeutic use of ionizing radiation, almost exclusively used for the treatment of malignant disease.

A miniature radio carried aloft (e.g. by an uncrewed balloon, an airdrop from a crewed aircraft, or a sounding rocket) to automatically transmit measurements of the upper air such as the wind speed, pressure, temperature, and relative humidity to a receiving station on the ground.