9. マルチパス干渉が信号環境に与える影響 · 2010. 7. 2. · radar (ssr)...
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1.
1090MHz
ATCIFF
S
[1] 1090MHz 1030MHz
SSR (Secondary Surveillance Radar)ACAS (Airborne Collision
Avoidance System) MLAT (Multilateration)IFF (Identification Friend or Foe)
S ATCS
S SATC
A/C
A/C [1]
[2]
[3]
ATC[4]
ATC
[5, 6, 7]
ICAO [8]
2. 1030MHz 2.1. 1030MHz
P1 P3
A/CP4
P2 ATCP1 P2
SLS Side Lobe Suppression
[1]
S P1-P2SLS A/C
S A/CS
DPSK P6SYNC
S S SLS P5
P5 P6
電子航法研究所研究発表会（第 10 回平成 22 年 6 月）
9. マルチパス干渉が信号環境に与える影響
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[1]
2.2. ATC MTLMinimum Triggering Level
[1]
P1~P3:<±0.2µs P1-1dB<P3<P1+3dB >90% P1~P2:>±0.7µs P2<P1-9dB
P1~P3:>±1.0µs - P1~P2:<±0.15µs P2>P1
P3LE~P4LE:>±0.3µs -P4 - P4<P3-6dB
P4long P3LE~P4TE:<±0.15µs P4 P3-6dB P4long P3LE~P4TE:>±0.3µs P4 P3-6dB
P1, P2, P3 A/C LE / TE: /
S P6LE-SYNC:<±0.05µsS P6LE-SYNC:>±0.2µs
P1, P2 1 A/C
A/C
P1 P3 MTL
P2 P3 P1 P2
S
A/CS ( )
P3 P4
P4 P4P4
P4long P4longP4long
S S P1 P2
3P6 SYNC
S
3. 3.1. A/C
A/C
M
[µs]> 0.7 P2
P2 M> MTL
< 0.7 M> MTL : P1-P27.0 9.0 M> MTL A : P2-P2 9.0 11.0 M> MTL A : P2-P1 20.0 22.0 M> MTL C : P2-P222.0 24.0 M> MTL C : P2-P1
[µs] 1.2 1.7 M> MTL : P2LE
A/C
A: A/C S:S
[µs] P1-9dB< M< P1-6dB
SLS : P1-P1 1.7 2.3
P3-6dB< M< P3 M>MTL
A: SLS : P1-P1S: P4 : P3-P3
7.0 9.0 M> MTL A : P1-P1 12.0 14.0
C
M> MTL A: :P1-P1-P3S: C
3.2. P2
A/C P2
P4A/C P4
S
[µs] 1.2 1.7 M> MTL A/C : P2LE
[µs] S: 0.5 0.8
P4long M> P3-6dB S
: P4 P1-9dB< M< P1-6dBM>MTL
SLS : P1-P1
1.7 2.3
P3-6dB< M< P3 M>MTL
A/C: P2LE
2.5 2.8 P4long
M> P3-6dB S: P4
A/C
3.3. S
S P2 P6LESYNC
A/CP2
SP6LE
P2 ADPSK
[µs]0.5 1.2 2.5 3.2
M> MTL S: S: P6LE
1.2 1.7 M> MTL A : P2LE1.75 19.0 M P6 : DPSK
4. 4.1.
PdTd Pm
Tm = Td + t
Pm / Pd = (Td / Tm) 2 = / (1 + t / Td)2
= 9dB
= 6dB
t / Td
tTd Pm / Pd
4.2.
電子航法研究所研究発表会（第 10 回平成 22 年 6 月）
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[µs] P1-9dB< M< P1-6dB
SLS : P1-P1 1.7 2.3
P3-6dB< M< P3 M>MTL
A: SLS : P1-P1S: P4 : P3-P3
7.0 9.0 M> MTL A : P1-P1 12.0 14.0
C
M> MTL A: :P1-P1-P3S: C
3.2. P2
A/C P2
P4A/C P4
S
[µs] 1.2 1.7 M> MTL A/C : P2LE
[µs] S: 0.5 0.8
P4long M> P3-6dB S
: P4 P1-9dB< M< P1-6dBM>MTL
SLS : P1-P1
1.7 2.3
P3-6dB< M< P3 M>MTL
A/C: P2LE
2.5 2.8 P4long
M> P3-6dB S: P4
A/C
3.3. S
S P2 P6LESYNC
A/CP2
SP6LE
P2 ADPSK
[µs]0.5 1.2 2.5 3.2
M> MTL S: S: P6LE
1.2 1.7 M> MTL A : P2LE1.75 19.0 M P6 : DPSK
4. 4.1.
PdTd Pm
Tm = Td + t
Pm / Pd = (Td / Tm) 2 = / (1 + t / Td)2
= 9dB
= 6dB
t / Td
tTd Pm / Pd
4.2.
電子航法研究所研究発表会（第 10 回平成 22 年 6 月）
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3 4
4.3.
SSR P1
MTLRaz N
Im = Raz NP2LE
Raz=0.15 N=300
1 Im = 45Hz A/C
3Hz 15
SSR
5. 5.1.
ATC
5.2.
[9]
ATC
7.
ATC1090MHz
[1] ICAO: "ANNEX 10, Volume-I, IV", 2003 [2] ICAO: "Manual of the Secondary Surveillance Radar (SSR) Systems", ICAO Doc. 9684, chapter 8, First ed., 1997 [3] Phillip J. Woodall: "ATCRBS Transponder Issue with Decoding Mode S P6 as a Result of Failure to Detect the Mode S Interrogation (preamble) P1 Pulse that Produces False Targets at Interrogators", RTCA SC-209, WG#1, ModeS-WP01-18, April 2007 [4] 1030MHz
No.107 2004 1 [5] 1030MHz
315 6
[6] 9
21 6 [7]
No.63 1989 12 [8] Tom Pagano, et.al.: "A Potential Source of 1090 MHz Interference: Wide P4 Reply from ATCRBS Whisper-Shout Interrogations", ASP TSG Meeting, January 2010 [9]
No.471984 12
電子航法研究所研究発表会（第 10 回平成 22 年 6 月）
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