Definitions

1. noun

an instrument for measuring the distance of a celestial body from the earth or the distance of a spacecraft from the earth, typically using radar or other electronic means.

“The astronomers used a telemeter to calculate the exact distance between the stars and the spacecraft.”

2. verb

to measure the distance of a celestial body or spacecraft from the earth or another reference point.

“The scientists telemetered the distance of the newly discovered planet from its sun.”