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A類障礙物限制測(cè)量（OLS）
􀃈 設(shè)備安裝方案
􀂙 坐標(biāo)測(cè)量，方案設(shè)計(jì)與評(píng)估
􀃈 設(shè)備安裝測(cè)試
􀂙 土建，設(shè)備運(yùn)輸，物理安裝，安裝性能測(cè)試
􀃈 培訓(xùn)
􀃈 飛行程序設(shè)計(jì)
中國(guó)民航局空中交通管理局
4、計(jì)劃進(jìn)度
􀀴第三階段——試驗(yàn)與驗(yàn)證
􀃈GBAS地面測(cè)試
􀂙 靜態(tài)測(cè)試，動(dòng)態(tài)測(cè)試
􀃈GBAS飛行測(cè)試
􀂙 SIS測(cè)試，功能測(cè)試，性能測(cè)試
􀃈GBAS飛行程序測(cè)試
中國(guó)民航局空中交通管理局
4、計(jì)劃進(jìn)度
􀀴第四階段——分析與評(píng)估
􀃈GBAS性能分析評(píng)估
􀃈 Honeywell SLS-4000系統(tǒng)的中國(guó)民航局
認(rèn)證
􀃈 Honeywell SLS-4000系統(tǒng)的飛行校驗(yàn)
􀃈GBAS飛行程序評(píng)估
􀃈GBAS運(yùn)行效益分析
􀃈 GBAS CAT II/III研究
中國(guó)民航局空中交通管理局
4、計(jì)劃進(jìn)度
􀀴相關(guān)各方：
􀃈 民航局計(jì)劃司、飛標(biāo)司、適航司
􀃈 民航局空管局、地區(qū)空管局、機(jī)場(chǎng)當(dāng)局、
設(shè)計(jì)院
􀃈 航空公司、校飛中心
􀃈 民航數(shù)據(jù)公司、中電集團(tuán)等
􀃈 Honeywell、Rockwell、Boeing等
中國(guó)民航局空中交通管理局
謝謝
中國(guó)民航局空中交通管理局
Dave Jensen, John Howard
Honeywell, Precision Landing Systems
29-30 Oct 2009
CAAC New Technology Seminar - GNSS
GNSS and GBAS Introduction
􀃆 Honeywell.com
GNSS and GBAS
• Global Navigation Satellite System (GNSS)
– Current implementations, applications
– How it works
– Accuracy, Integrity
• Types of GNSS Augmentation
• Ground Based Augmentation System (GBAS)
– How it works
– Architecture
– Subsystems
• GPS Accuracy and Aircraft Protection Levels
– Un-augmented
– With WAAS
– With GBAS
Dave Jensen/John Howard
2
CAAC New Technology Seminar – GBAS 29-30 October 2009
􀃆 Honeywell.com
Current GNSS
GNSS Compass GPS Galileo GLONASS
Origin China USA Europe Russia
Operational 2015 1995 2012 1995
# Satellites NA / 35 30 / 32 NA / 30 19 / 24
21 150 k 22 200 k 23 222 k 19 100 k
• Global Navigation Orbits
21,150 km
12.6h
22,200 km
12.0h
23,222 km
14.1h
19,100 km
11.3h
Satellite Systems (GNSS)
– Have become a global utility
– Provide civilian and military (precise) positioning services
– Consistent, predictable, dependable performance
• Applications for GNSS Keep Growing
– Agriculture, Aviation, Marine, Surveying, Traffic, Timing, Tectonics...
P i i i ti ith h l )
Dave Jensen/John Howard
3
CAAC New Technology Seminar – GBAS 29-30 October 2009
– Precision navigation ( with help)
􀃆 Honeywell.com
GNSS Theory of Operation
Dave Jensen/John Howard
4
CAAC New Technology Seminar – GBAS 29-30 October 2009
􀃆 Honeywell.com
GNSS Theory of Operation
• Each satellite transmits its position and a time signal
• The signals are delayed by the distance traveled to user
• From the delay, user calculates distance or “pseudorange” to each satellite
• User determines where there pseudoranges “overlap”
– This is your position!
• GNSS Provides Position, but No Integrity and Limited Accuracy
– Precision application require accuracy
– Safety applications require integrity
• Receiver Autonomous Integrity Monitor (RAIM)
– Provides user with integrity of their position solution
• Used in aircraft receivers
– Requires at least 5 satellites in view
– Receiver excludes 1 or 2 satellites
• Determine a “position” (with satellite excluded)
– Repeat for all satellites in view
– Determine error bound (integrity) of position by
• Discarding outlier “position” solutions
Dave Jensen/John Howard
5
CAAC New Technology Seminar – GBAS 29-30 October 2009
• Computing variance of “position” solutions
􀃆 Honeywell.com
GNSS Accuracy
• GPS Position Errors can be up to 10 m
• Predominant GNSS Error Sources are:
– Ionosphere (up to 5 m)
– Satellite Position (up to 2.5 m)
– Troposphere (up to 2 m)
– Satellite Clock (up to 2 m)
– Multipath/Reflections (up to 1 m)
– Calculation/Rounding (up to 1 m)
• Poor Geometry of Satellites Increases these Errors
– Geometric Dilution of Precision (GDOP)
• Errors are Measurable, Locally-Correlated, but not Predictable
　
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航空翻譯 www.aviation.cn
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