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P and Q factors and tone transmission rank for the ESA standard are :
T
ONE
RANK
(1 =
)
FIRST
7 (note 1)
6
5
4
3
2
1
Note 1: the major tone is transmitted first but the phase measurements on that tone are performed only after
minor tones transmission.
Note 2: P and Q factors for the ESA standard are « hard-wired » (not programmable).
3.6.8.3. Ranging Sequence
Next figure illustrates the ranging measurement sequence:
1
Major tone
Ta
IT = Integration Time
1. On reception of a ranging request from the Ranging Client, the RAU computes the tone definition
tables (only the first time a ranging request is received for the current RAU configuration). Then, if the
computation is successful, the RAU starts transmitting the major tone. Status Measurement Progress
in the RAU monitoring table starts incrementing.
2. Ta seconds later, transmission of the first minor tone along with the major tone (T-second set time).
3. Average phase measurement for the first minor tone. Parameter Integration Time (IT) is
programmable from 250 ms to 500 s in 250-ms steps.
© Safran Data Systems
COMMAND RANGING & TELEMETRY UNIT CORTEX
CRT QUANTUM USER'S MANUAL
Q (2)
P (2)
5
1
25
1
125
4
625
21
3 125
101
15 625
501
62 500
2001
Table 26: ESA Tone Standard. Tone Definition
2
3
T
IT
Major tone + minor tones
Figure 79: Ranging Sequence (ESA Standard)
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It cannot be duplicated or distributed without expressed written consent.
V
T
IRTUAL
ONE
F
(
)
REQUENCY
KHZ
100.000
20.000
4.000
0.800
0.160
0.032
0.008
6
4
5
N measurements on the major tone
One measurement every 250 ms
Major tone
T
IT
Ts
Safran Data Systems
.
Ref.
DTU 100042
Is.Rev.
5.17
Date:
Dec.
03, 2021Sept. 30, 2021
R
T
EAL
ONE
F
(
)
REQUENCY
KHZ
100.000
20.000
16.000
16.800
16.160
16.032
16.008
7
Page 174
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