GB/T 42647-2023 English PDF

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GB/T 42647-2023: In-orbit field calibration method for spaceborne laser altimeter
Status: Valid

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Basic data

Standard ID: GB/T 42647-2023 (GB/T42647-2023)
Description (Translated English): In-orbit field calibration method for spaceborne laser altimeter
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: V75
Classification of International Standard: 49.020
Word Count Estimation: 11,153
Date of Issue: 2023-05-23
Date of Implementation: 2023-09-01
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 42647-2023: In-orbit field calibration method for spaceborne laser altimeter

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 49:020 CCSV75 National Standards of People's Republic of China On-orbit site calibration method for spaceborne laser altimeter Released on 2023-05-23 2023-09-01 implementation State Administration for Market Regulation Released by the National Standardization Management Committee

table of contents

Preface I Introduction II 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 General requirements 1 4:1 Laser calibration field 1 4:2 Measuring instruments and equipment 2 4:3 Measurement environment 2 5 Calibration data acquisition 2 5:1 Surface survey data 2 5:2 Atmospheric parameters 3 5:3 Spaceborne laser altimeter data 3 6 Technical process and calculation method 3 6:1 Technical process 3 6:2 Calculation method 4 7 Calibration uncertainty analysis 6 7:1 Analysis step 6 7:2 Influencing factors of uncertainty 6 7:3 Uncertainty calculation formula 6

foreword

This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents" drafting: Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents: This document is proposed and managed by the National Aerospace Technology and Its Application Standardization Technical Committee (SAC/TC425): This document was drafted by: China Resources Satellite Application Center, China Siwei Surveying and Mapping Technology Co:, Ltd:, Aerospace Information Innovation of Chinese Academy of Sciences Research Institute, Wuhan University, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Chinese Academy of Surveying and Mapping, Beijing Zhongkan Maipuke Technology Co:, Ltd:, the Fourth Topographic Survey Team of the Ministry of Natural Resources, Xi'an Jiaotong University, Taiyuan University of Technology, and China Aerospace Standardization Institute: The main drafters of this document: Han Qijin, Ma Lingling, Long Xiaoxiang, Li Jingmei, Li Song, Min Xiangjun, Xu Zhaopeng, Li Dacheng, Wang Yupeng, Li Qingpeng, Chen Jun, Zeng Jian, Zhao Hang, Di Zhizhong, Ma Yue, Lian Zhipeng, Cui Lin, Zhang Xuewen, Li Xiaojin, Ma Xiuxiu, Du Xiaozheng, Zhao Yongguang, Zhao Yuanchun, Zhang Zexing, Li Zonghe:

Introduction

On-orbit calibration is the premise and basis for ensuring the quality and accuracy of spaceborne laser altimeter products: In order to ensure the land observation satellite laser measurement In order to realize the standardization and reliability of Altimeter’s on-orbit site calibration method, this document is formulated, so as to realize the distance measurement error and The high-precision calibration of the pointing angle error provides reliable calibration parameters for the laser data processing of the ground processing system of the spaceborne laser altimeter, and improves the accuracy of the laser altimeter: The quality and accuracy of optical altimetry data products: On-orbit site calibration method for spaceborne laser altimeter

1 Scope

This document specifies the general requirements for on-orbit calibration of spaceborne laser altimeters, calibration data acquisition, technical process and calculation methods, calibration Uncertainty analysis, etc: This document is applicable to the on-orbit site calibration of spaceborne laser altimeter ranging and laser pointing angle system errors: Other similar spaceborne lasers The calibration of the load can refer to the use:

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document: GB/T 18314 Global Positioning System (GPS) measurement specification GB 22021 National Geodetic Basic Technical Regulations GB/T 34509:2-2017 On-orbit site radiometric calibration method for optical remote sensors of land observation satellites Part 2: Thermal infrared

3 Terms and Definitions

The following terms and definitions defined in GB 22021 apply to this document: 3:1 Mounted on a satellite, it is an active detection lidar system that precisely measures the distance from the satellite to the earth's surface or the fluctuation of the earth's surface: 3:2 Calibration test site for correcting system errors of pointing angle and ranging value of spaceborne laser altimeter: 3:3 The phenomenon that the optical path time caused by atmospheric refraction in laser ranging is longer than the actual transmission time in vacuum:

4 General requirements

4:1 Laser calibration field 4:1:1 Site requirements The requirements for the laser calibration site are as follows: a) The side length of the site should be greater than the sum of the diameter of the laser footprint and the error range of the laser altimeter point forecast; b) The overall inclination of the site should be less than 2°; c) The site is open, and there are no obstacles around that affect the work of the laser ground detector; ......

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