GB/T 42646-2023Arrangement and measurement of laser footprint detectors for the field calibration of spaceborne laser altimeter (English PDF)
星载激光测高仪场地定标探测器布设与测量方法
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
May 23, 2023
Implementation date
September 1, 2023
Scope
GB/T 42646-2023 is the English-translated version of 星载激光测高仪场地定标探测器布设与测量方法.
This document specifies the arrangement and measurement of the laser footprint detectors used in the field calibration of a spaceborne laser altimeter: the general requirements, the requirements governing their layout, what is measured and in what order, how the measurement data are processed, and the analysis of uncertainty.
The document applies to the arrangement and measurement of those detectors; other similar ground detectors may follow it as a reference.
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Document preview — GB/T 42646-2023
National Standard of the People's Republic of China
- ICS
- 49.020
- Classification
- V 75
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Preface
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 General requirements
- 4.1 Measuring instruments
- 4.2 Measuring weather
- 4.3 Setting up the site
- 5 layout requirements
- 5.1 Requirements for layout of laser ground detectors
- 5.2 Layout requirements for laser corner reflectors
- 6 Measurement content
- 7 Measurement procedure
- 8 Measurement data processing method
- 9 Uncertainty analysis
- 9.1 Analysis step
- 9.2 Uncertainty factor
- 9.3 Uncertainty calculation formula
- Appendix A (Informative) Layout Diagram
- Appendix B (Informative) Record Form
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.
Introduction
Affected by the launch process and external environmental factors on orbit, the laser pointing parameters and ranging parameters of the spaceborne laser altimeter will have certain differences.
Variety. In order to ensure the quality of the elevation data products of the subsequent ground processing system, it is necessary to carry out on-orbit calibration of the spaceborne laser altimeter to obtain accurate The laser altimeter pointing angle and ranging parameter error correction coefficient.
The purpose of this document is to formulate scientific and feasible ground detector layout and operation rules for field calibration of spaceborne laser altimeter Fan, to ensure that the ground laser detector can accurately capture the ground footprint information of the spaceborne laser altimeter, and provide reliable information for the on-orbit calibration of the spaceborne laser altimeter. Rely on ground control information. Spaceborne Laser Altimeter Site Calibration Detector Layout and measurement method
1 Scope
This document specifies the general requirements, layout requirements, measurement content, and measurement procedures for spaceborne laser altimeter site calibration and ground detector measurement. sequence, measurement data processing methods and uncertainty analysis.
This document is applicable to the layout and measurement of spaceborne laser altimeter site calibration ground detectors. Use of other similar ground detectors The formula refers to the execution.
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 Laser ground detector
The photoelectric detection equipment that captures the laser footprint information emitted by the spaceborne laser altimeter on the ground.
3.2 Spaceborne laser altimeter
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.
3.3 Calibration site
Calibration test site for correcting system errors of pointing angle and ranging value of spaceborne laser altimeter.
4 General requirements
4.1 Measuring instruments
4.1.1 Laser ground detectors
The laser ground detector is a photoelectric detection device used to capture the ground laser footprint information emitted by the spaceborne laser altimeter. For calibration, the performance requirements are as follows:
a) The wavelength response range should cover the working band of the spaceborne laser altimeter;
b) The energy response range should cover the energy density within the ground footprint range of the spaceborne laser altimeter;
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB 22021-2008 — Basic specifications for national geodesy
GB/T 18314-2009 — Specifications for global positioning system (GPS) surveys
GB/T 18314-2024 — Specifications for survey and measurement of global navigation satellite system
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