Rho theta

This article or the following section is not adequately provided with supporting documents ( e.g. individual evidence ). Information without sufficient evidence could be removed soon. Please help Wikipedia by researching the information and including good evidence.

Rho-Theta is a term used in navigation for a group of positioning methods that are based on the measurement of polar coordinates (direction and distance to a radio beacon ).

The term is made up of the names of two Greek letters:

• Rho (Greek ρ) as a synonym for distance measurement or for r ange
• Theta (Greek θ) for the corresponding direction measurement .

If the direction and distance to a fixed point are measured, the position of the location results from its geographical coordinates by applying the first main geodetic task . In flight navigation, for example, VOR / TACAN belongs to this group of procedures, in long-distance navigation the (now technically obsolete) NavaRho .