View source for Range Only Measurement of Trajectory and Recording

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'''Range Only Measurement of Trajectory and Recording'''
 
</dt><BR/>A nonambiguous spherical and elliptical, long-baseline, range-only [[Trajectory Measuring System|trajectory measuring system]] utilizing 
phase comparison techniques with range modulation frequencies. 
</dd><BR/>''The system consists of three of more receivers which track a [[Transponder|transponder]] interrogated by a signal transmitter. 
The reference signal from the ground transmitter is also received by the ground 
receivers. Simultaneous range measurements are made by the ground receivers, 
which are correlated with base timing from which space position can be computed 
by triangulation. The system operates on 387 and 417 megacycles. '' 
</dd>
==References==
''This article is based on NASA's [[NASA SP-7|Dictionary of Technical Terms for Aerospace Use]]''
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