Tellurometer
The tellurometer ( Latin - Greek ) was the first successful distance measuring device based on microwaves .
The first tellurometer was invented in 1957 by Trevor Lloyd Wadley (Telecommunications Research Laboratory of the South African Council for Scientific and Industrial Research , CSIR) and marketed as M / RA 1. Although the device was less precise than the geodimeters used at the time , which worked with light waves, it was easier to transport. The transmitter and the reflector each weighed 17 kg. It took some time to set up an exact measurement, until the electronic tube technology was warmed up and the ambient temperature on the device was compensated.
The tellurometer works with microwaves, whereby one station sends the waves, the distant station sends the waves back modulated so that one can calculate their distance from the phase shift . The instrument can be used in the dark in rain and fog and is sufficient for distances of up to 70 km .
Individual evidence
- ↑ Distance Measurement Tools: Tellurometer Model M / RA 1. In: NOAA Celebrates 200 years of Science. NOAA , 2007, accessed November 15, 2015 .
- ^ Brian Sturman, Alan Wright: The History of Tellurometer. 2008, accessed November 15, 2015 .