Variable radar altimeter test apparatus

Abstract

A variable radar altimeter test system for providing a test of the altime portion of a flying object guidance system which simulates actual flight conditions includes an antenna connection to receive a signal from the flying object being tested, a synthesizer for generating a signal programmed to simulate data characteristic of a radar return signal, pulse modulation of the programmed signal to create a third signal which is returned to the flying object under test to stimulate the altimeter portion of its guidance system.

We claim: 
     
       1. An apparatus for testing the altimeter portion of the guidance system of a flying object during a simulated flight including, means for detecting the envelope of a signal received from the flying object under test,   means including a programmable synthesizer for creating programmable signal,   means for pulse modulating the programmable signal with the envelope of the signal from the flying object to create a third signal,   and means for transmitting the third signal to the flying object to stimulate the altimeter portion of the flying object guidance system.   
     
     
       2. An apparatus according to claim 1 wherein the third signal includes time delay and attenuation characterisic of a radar return signal.