Method for aircraft velocity error detection with a Doppler rada

Details Method for aircraft velocity error detection with a Doppler rada Method for aircraft velocity error detection with a Doppler rada

1988-11-04

1992-04-28

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

With plural beams

342120, 342121, G01S 1360

Patent

active

051092301

ABSTRACT:
A method for preventing errors in the Doppler radar measurement of velocity in aircraft that result from the radar receiver being locked to backscatter from side lobes of a plurality of main lobes radiated in a fixed radiation geometry. The inertial vertical velocity component (V.sub.IZ) obtained by a baro-inertial control loop is compared with the vertical velocity component (V.sub.DZ) determined from the Doppler frequencies to derive an error detection signal. When the error signal occurs, the inertial vertical velocity component replaces the corresponding velocity component supplied from the Doppler system while the horizontal velocity components are determined, for example, from the last calculated wind and the corresponding airspeed components, for the duration of the error signal.

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