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3.6.3.2.1. ESA, ESA-like, Hybrid Ranging and USB Standards ........................................................................................ 154
3.6.3.2.2. ESA Code Standard ............................................................................................................................................ 156
3.6.3.3.
Phase-shift Measurement ......................................................................................................................................... 157
3.6.3.4.
Phase-shift Correction for Ambiguity Solving ......................................................................................................... 157
3.6.3.4.1. "Spectrum Correction" ....................................................................................................................................... 157
3.6.3.4.2. "Ground Correction" .......................................................................................................................................... 158
3.6.3.4.3. "Board Correction" ............................................................................................................................................. 158
3.6.3.5.
Doppler Rate Aid and Doppler Aid ......................................................................................................................... 159
3.6.3.5.1. Doppler Effects .................................................................................................................................................. 159
3.6.3.5.2. Carrier Doppler Shift in Coherent Mode ............................................................................................................ 159
3.6.3.5.3. Carrier Doppler Shift in Non-Coherent Mode .................................................................................................... 160
3.6.3.5.4. Doppler Rate Aid Principle and Architecture ..................................................................................................... 161
3.6.3.5.5. Doppler Aid Principle and Architecture ............................................................................................................. 162
3.6.3.6.
Range Measurements Sampling ............................................................................................................................... 164
3.6.4.
Other programming Parameters ............................................................................................................... 165
3.6.4.1.
Number of Measurements & Sequences .................................................................................................................. 165
3.6.4.2.
Tone Validation and Tone Sequence (ESA-like and USB tone Standards) ............................................................. 165
3.6.4.3.
Measurement Sampling............................................................................................................................................ 165
3.6.4.4.
Integration Time ...................................................................................................................................................... 165
3.6.4.5.
Tone Level Ratio ..................................................................................................................................................... 166
3.6.4.6.
PLL Bandwidth ........................................................................................................................................................ 166
3.6.4.7.
Sequence Timing & Ambiguity Solving .................................................................................................................. 167
3.6.4.7.1. ESA, ESA-like and USB Tone Standards .......................................................................................................... 167
3.6.4.7.2. ESA Code Standard ............................................................................................................................................ 168
3.6.5.
Measurement Time-Tagging ...................................................................................................................... 169
3.6.6.
Ranging Transaction Messages ................................................................................................................. 170
3.6.6.1.
Range Measurement................................................................................................................................................. 170
3.6.6.2.
Calibration Measurement ......................................................................................................................................... 170
3.6.6.3.
Time and Doppler Measurement .............................................................................................................................. 171
3.6.7.
Storage of Ranging Messages .................................................................................................................... 172
3.6.8.
ESA Tone Standard .................................................................................................................................... 173
3.6.8.1.
General ..................................................................................................................................................................... 173
3.6.8.2.
Tone Frequencies ..................................................................................................................................................... 173
3.6.8.2.1. Virtual Tones ...................................................................................................................................................... 173
3.6.8.2.2. Real Tones .......................................................................................................................................................... 173
3.6.8.3.
Ranging Sequence .................................................................................................................................................... 174
3.6.9.
ESA-like and USB Tone Standards ............................................................................................................ 176
3.6.9.1.
Frequency Programming .......................................................................................................................................... 176
3.6.9.2.
Number of Tones and Transmission Rank ............................................................................................................... 177
3.6.9.3.
Real and Virtual Minor Tone Frequency ................................................................................................................. 177
3.6.9.4.
Ambiguity Distance ................................................................................................................................................. 177
3.6.9.4.1. Integer Ratio Between Q Factors ........................................................................................................................ 177
3.6.9.4.2. Non-Integer Ratio Between Q Factors ............................................................................................................... 178
3.6.10.
INMARSAT / LMCO Tone Standards ........................................................................................................ 179
3.6.10.1. General ..................................................................................................................................................................... 179
3.6.10.2. Tone Frenquencies ................................................................................................................................................... 179
3.6.10.3. Minor Tone Sub-Carrier........................................................................................................................................... 179
3.6.10.4. Ranging Sequence .................................................................................................................................................... 179
3.6.11.
ESA Code Standard ................................................................................................................................... 182
3.6.11.1. General ..................................................................................................................................................................... 182
3.6.11.2. Frequency Programming .......................................................................................................................................... 182
3.6.11.3. Code Programming .................................................................................................................................................. 182
3.6.11.4. Tone & Code Set Time ............................................................................................................................................ 183
3.6.11.5. Ranging Sequence .................................................................................................................................................... 183
3.6.12.
PN Codes Standard (Regenerative PN Ranging) ...................................................................................... 185
3.6.12.1. General ..................................................................................................................................................................... 185
3.6.12.2. Frequency Programming .......................................................................................................................................... 185
3.6.12.3. Code Programming .................................................................................................................................................. 186
3.6.12.4. Shaping Filter ........................................................................................................................................................... 186
3.6.12.5. Tone & Code Set Time ............................................................................................................................................ 187
3.6.12.6. Ranging Sequence .................................................................................................................................................... 188
3.6.13.
Hybrid Ranging Standard .......................................................................................................................... 190
3.6.13.1. General ..................................................................................................................................................................... 190
3.6.13.2. Tone Frequencies ..................................................................................................................................................... 190
3.6.13.3. Ambiguity ................................................................................................................................................................ 192
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Safran Data Systems
.
Ref.
DTU 100042
Is.Rev.
5.17
Date:
Dec. 03, 2021Sept.
30, 2021
Page ix
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