Echo Signal Simulation of Frequency Step-Scanned IPDA Lidar and Error Analysis for Space-Borne CO2 Detection

Si Ying Chen; Yang Ma; Pan Guo; Yin Chao Zhang; He Chen

doi:10.15918/j.tbit1001-0645.2017.08.014

Echo Signal Simulation of Frequency Step-Scanned IPDA Lidar and Error Analysis for Space-Borne CO₂ Detection

Si Ying Chen, Yang Ma^*, Pan Guo, Yin Chao Zhang, He Chen

^*Corresponding author for this work

School of Optics and Photonics

Beijing Institute of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

A frequency step-scanned IPDA lidar was designed for space-borne CO₂ detection. Compared with single on-line wavelength IPDA lidar of ESA, the distributed wavelength sampling across the line region could reduce the impacts of wavelength dependent responses on the lidar and also reduce the relative error. The echo signal, relative random error, frequency drift error and pressure uncertainties error as a function of the on-line wavelength with one scanned cycle was simulated. The total CO₂ concentration relative error is 0.084 2% with 0.035 sr^-1 reflectivity, 0.3 MHz frequency drift error and 0.001 pressure uncertainties error when the on-line wavelength stepped in 6 361.235 0 cm^-1. The results show that compared with 1.0×10^-6 accuracy of single on-line IPDA lidar, the measurement error of space-borne CO₂ wavelength step-scanned IPDA lidar is less than 0.5×10^-6.

Original language	English
Pages (from-to)	848-852
Number of pages	5
Journal	Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
Volume	37
Issue number	8
DOIs	https://doi.org/10.15918/j.tbit1001-0645.2017.08.014
Publication status	Published - 1 Aug 2017

Keywords

CO
Error analysis
IPDA lidar
Retrieve
Space-borne system
Step-scanned

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title = "Echo Signal Simulation of Frequency Step-Scanned IPDA Lidar and Error Analysis for Space-Borne CO2 Detection",

abstract = "A frequency step-scanned IPDA lidar was designed for space-borne CO2 detection. Compared with single on-line wavelength IPDA lidar of ESA, the distributed wavelength sampling across the line region could reduce the impacts of wavelength dependent responses on the lidar and also reduce the relative error. The echo signal, relative random error, frequency drift error and pressure uncertainties error as a function of the on-line wavelength with one scanned cycle was simulated. The total CO2 concentration relative error is 0.084 2% with 0.035 sr-1 reflectivity, 0.3 MHz frequency drift error and 0.001 pressure uncertainties error when the on-line wavelength stepped in 6 361.235 0 cm-1. The results show that compared with 1.0×10-6 accuracy of single on-line IPDA lidar, the measurement error of space-borne CO2 wavelength step-scanned IPDA lidar is less than 0.5×10-6.",

keywords = "CO, Error analysis, IPDA lidar, Retrieve, Space-borne system, Step-scanned",

author = "Chen, {Si Ying} and Yang Ma and Pan Guo and Zhang, {Yin Chao} and He Chen",

year = "2017",

month = aug,

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doi = "10.15918/j.tbit1001-0645.2017.08.014",

language = "English",

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pages = "848--852",

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AU - Chen, Si Ying

AU - Ma, Yang

AU - Guo, Pan

AU - Zhang, Yin Chao

AU - Chen, He

PY - 2017/8/1

Y1 - 2017/8/1

N2 - A frequency step-scanned IPDA lidar was designed for space-borne CO2 detection. Compared with single on-line wavelength IPDA lidar of ESA, the distributed wavelength sampling across the line region could reduce the impacts of wavelength dependent responses on the lidar and also reduce the relative error. The echo signal, relative random error, frequency drift error and pressure uncertainties error as a function of the on-line wavelength with one scanned cycle was simulated. The total CO2 concentration relative error is 0.084 2% with 0.035 sr-1 reflectivity, 0.3 MHz frequency drift error and 0.001 pressure uncertainties error when the on-line wavelength stepped in 6 361.235 0 cm-1. The results show that compared with 1.0×10-6 accuracy of single on-line IPDA lidar, the measurement error of space-borne CO2 wavelength step-scanned IPDA lidar is less than 0.5×10-6.

AB - A frequency step-scanned IPDA lidar was designed for space-borne CO2 detection. Compared with single on-line wavelength IPDA lidar of ESA, the distributed wavelength sampling across the line region could reduce the impacts of wavelength dependent responses on the lidar and also reduce the relative error. The echo signal, relative random error, frequency drift error and pressure uncertainties error as a function of the on-line wavelength with one scanned cycle was simulated. The total CO2 concentration relative error is 0.084 2% with 0.035 sr-1 reflectivity, 0.3 MHz frequency drift error and 0.001 pressure uncertainties error when the on-line wavelength stepped in 6 361.235 0 cm-1. The results show that compared with 1.0×10-6 accuracy of single on-line IPDA lidar, the measurement error of space-borne CO2 wavelength step-scanned IPDA lidar is less than 0.5×10-6.

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KW - Error analysis

KW - IPDA lidar

KW - Retrieve

KW - Space-borne system

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Echo Signal Simulation of Frequency Step-Scanned IPDA Lidar and Error Analysis for Space-Borne CO₂ Detection

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Keywords

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