Safran CORTEX CRT Quantum - Time and Doppler Measurement

COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
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Page 171
3.6.6.3. Time and Doppler Measurement
On reception over the Ranging port of a request for Time and Doppler measurements (request message offset
# 4 = 3) the ranging transaction response messages returned to the ranging Client contain the following
information:
 Two-way time (range) values in nanoseconds (after ambiguity solving),
 Synchronized (see note 1) Doppler and range measurements.
 Ambiguity solving quality factor,
 Measurement sampling period,
 IF level,
 Carrier and input center frequencies.
The ranging Sampling rate parameter is used (not the Doppler sampling parameter).
Doppler measurement data are still available over the Doppler port. Doppler compensation and Doppler rate aid
functions remain also available.
Note 1: the first range and Doppler measurements in every ranging transaction response message can be
synchronized to even seconds by setting the registry key SynchroMode to 1 (access path:
HKEY_LOCAL_MACHINE\SOFTWARE\In-snec\CortexCRT\ SetDefault\Signal Processing\Rau).