Tellurometer

The tellurometer (Latin - greek. ) Was the first successful distance measuring device based on microwave technology.

The first was tellurometer by Trevor Lloyd Wadley ( Telecommunications Research Laboratory of the South African Council for Scientific and Industrial Research, CSIR ) invented and marketed in 1959 as M / RA 1.

The tellurometer works with microwaves, a station transmits the waves, the distant station, the waves returning modulated so that you can calculate its distance from the phase shift. The instrument can be used at night in rain and fog and extends for distances of up to 70 km.