Sequence Timing & Ambiguity Solving; Esa, Esa-Like And Usb Tone Standards - Safran CORTEX CRT Quantum User Manual

3.6.4.7. Sequence Timing & Ambiguity Solving

3.6.4.7.1. ESA, ESA-like and USB Tone Standards

Configuration parameters:



Allow accurate adjustment of the ranging sequence duration and a more efficient ambiguity solving for the ESA
and ESA-like tone standards.
Parameter Sequence Timing & Ambiguity Resolution is for selecting any of the following scenarios
(parameters T, Ta and Ts: see Figure 75):
 Scenario 1 (select All Fixed):
The major tone set time depends on the selected RAU PLL bandwidth (parameter PLL
Bandwidth). The minor tone set time is fixed:
Major tone:
Minor tones:
Ambiguity solving (distance computation) is performed in the range 0 to the wavelength of the
lowest virtual minor tone. Do not use this setting in case of non-integer ratio between minor tone «
Q » factors.
 Scenario 2 (select Fixed seq.):
Set times for the major and minor tones are as per scenario 1.
Ambiguity solving (distance computation) is performed over the distance range specified by the
Operator. Use this setting in case of non-integer ratio between minor tone « Q » factors.
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Sequence timing & ambiguity solving,
Minimum satellite-to-earth distance,
Maximum satellite-to-earth distance,
PLL bandwidth (2Bn) = 1 to 8 Hz:
PLL bandwidth (2Bn) < 1 Hz:
Example: if the PLL bandwidth is set to 0.4 Hz, Ta = Ts = 5 seconds
T = 0.5 (in second)
This document is the property of
It cannot be duplicated or distributed without expressed written consent.
Ta = Ts = 2 (in seconds)
Safran Data Systems
.
Ref. DTU 100042
Is.Rev. 5.17
Date: Dec.
03, 2021Sept. 30, 2021
2
Ta = Ts = (in seconds)
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