Safran CORTEX CRT Quantum - Ranging Transaction Messages; Range Measurement; Calibration Measurement

COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
© Safran Data Systems
This document is the property of Safran Data Systems.
It cannot be duplicated or distributed without expressed written consent.
Page 170
3.6.6. Ranging Transaction Messages
3.6.6.1. Range Measurement
The ranging transaction response message for a range measurement request contains:
 Two-way « Distance » values, in nanoseconds (after ambiguity solving. Not significant for the
INMARSAT and LMCO standards,
 The ambiguity solving quality factor (not significant for the INMARSAT and LMCO standards).
Then, for each tone and only in case of request for phase and time measurements:
 Major tone phase-shift values (

), excluding « Spectrum Correction » and « Board
Correction »,
 Minor tone phase-shift values (

). For the ESA, ESA-like and USB tone standards, the
CORTEX CRT Quantum returns average phase-shift values, including Doppler compensation but
excluding « Spectrum Correction » and « Board Correction ». Not significant for the ESA code
standard.
 Correction for spectrum offsets and on-board phase-delay (

 

) for each
tone.
All phase values are expressed in degrees, with a resolution of 360°/2
16
≈ 0.0055°.
3.6.6.2. Calibration Measurement
The ranging termination message for a calibration measurement request contains:
 Two-way « Distance » values, in nanoseconds (after ambiguity solving. Not significant for the
INMARSAT and LMCO standards),
 The ambiguity solving quality factor (not significant for the INMARSAT and LMCO standards),
Then, for each tone and only in case of request for phase and time measurements:
 Major tone phase-shift values (

), excluding « Spectrum Correction » and « Ground
Correction »,
 Minor tone phase-shift values (

). For the ESA, ESA-like and USB standards, the CORTEX
CRT Quantum returns average phase-shift values, including Doppler compensation but excluding «
Spectrum Correction » and « Ground Correction ». Not significant for the ESA code standard.
 Correction for spectrum offsets and ground phase-delay (

 

) for each
tone.
All phase values are expressed in degrees, with a resolution of 360°/2
16
≈ 0.0055°.