# Pseudo route

**Pseudorange** or **pseudorange** denotes the first approximation of the distance between a transmitter and a receiver from the transit time of the radio signal . Pseudo (false, inauthentic), because because of the large factor of the *speed of light* (300 meters per microsecond), even small clock errors mean that the pseudo-distances are useless as a direct measure of the distance.

If pseudo-routes to two transmitters, e.g. B. navigation satellites can be measured and the clock error can be assigned to the receiver because the transmitters have more accurate clocks and synchronize with each other, then you can effectively measure a distance *difference* that determines the position of the receiver on a hyperbola with known positions of the transmitter , see Hyperbola navigation .

For the possibility of eliminating the clock error, see e.g. B. the article GPS technology . The manufacturer-independent exchange format for GPS pseudo-routes is called RINEX .

## literature

- Peter JG Teunissen, Alfred Kleusberg:
*GPS observation equations and positioning concepts.*Lecture Notes in Earth Sciences, 1996, Volume 60, pp. 175-217.