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GB/T 45724-2025 English PDF

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GB/T 45724-2025: Design methods for satellite-earth data transmission link of remote sensing satellites
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Basic data

Standard ID GB/T 45724-2025 (GB/T45724-2025)
Description (Translated English) Design methods for satellite-earth data transmission link of remote sensing satellites
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard M14
Classification of International Standard 33.200
Word Count Estimation 18,187
Date of Issue 2025-05-30
Date of Implementation 2025-12-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 45724-2025: Design methods for satellite-earth data transmission link of remote sensing satellites


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ICS 33.200 CCSM14 National Standard of the People's Republic of China Design Method of Satellite-to-Earth Data Transmission Link for Remote Sensing Satellite Released on 2025-05-30 2025-12-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of contents

Preface III Introduction IV 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Symbols and abbreviations 3 5 Design Requirements 3 6 Design Methods 3 6.1 Overall Process 3 6.2 Obtaining design input parameters 4 6.2.1 Satellite data transmission system related parameters 4 6.2.2 Parameters related to ground receiving system 5 6.2.3 Space transmission link related parameters 5 6.2.4 Engineering requirements related parameters 5 6.3 Parameter calculation 5 6.3.1 [EIRP] of satellite data transmission system 5 6.3.2 Ground receiving system [G/T] 5 6.3.3 Free space loss [Ls] 6 6.3.4 Atmospheric loss [La] 6 6.3.5 Polarization loss [Lp] 6 6.3.6 Antenna pointing loss [Lep] 7 6.3.7 Losses due to precipitation [F] 7 6.4 Eb/N0 calculation 8 6.5 Reserve Calculation 9 6.6 Result judgment 9 6.7 Adjusting Input Parameters 9 6.8 Design Verification 9 Appendix A (Informative) Parameter Values 11 Reference 12

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 of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the Chinese Academy of Sciences. This document is under the jurisdiction of the National Remote Sensing Technology Standardization Technical Committee (SAC/TC327). This document was drafted by. Institute of Space Information Innovation, Chinese Academy of Sciences, China Academy of Space Technology, China Electronics Technology Group Corporation Research Institute, Beijing Rongwei Technology Co., Ltd. The main drafters of this document are. Zhang Hongqun, Zhang Yumeng, Feng Xuxiang, Wang Wanyu, Li An, Liu Zhaoyan, Li Yalin, He Yuanchun, Wang Zhenxing, Zheng Jinxiu, Xu Lu.

Introduction

The satellite-to-ground data transmission link is the channel for satellite to transmit data to the ground, which is related to the efficiency and quality of satellite data transmission to the ground. The design of the ground data transmission link is one of the key technical links in satellite engineering, and it is also the key to enable the satellite to quickly and effectively download the collected data. An important guarantee for transmission. Remote sensing satellite data has the characteristics of large data volume and high data transmission rate. In order to meet the demand for high-speed data transmission between satellite and ground, polarization frequency complex The application of technologies such as Ka-band data transmission, high-order modulation and demodulation system and efficient encoding and decoding has become the core of remote sensing satellite satellite data transmission. The introduction of these technologies has put forward new requirements for the design of satellite-to-ground data transmission links for remote sensing satellites. The satellite-to-ground data transmission link design method provides a basis for the formulation of technical indicators and performance evaluation for the design, development, and testing of engineering systems, which is helpful Reduce technical risks of satellite-ground systems. Design Method of Satellite-to-Earth Data Transmission Link for Remote Sensing Satellite

1 Scope

This document specifies the design requirements for the satellite-to-ground data transmission link of remote sensing satellites, gives the overall design process of the satellite-to-ground data transmission link, and provides the input parameters. The number and its calculation method are described, and the method of judging and verifying that the link meets the design requirements of satellite-to-ground data transmission of remote sensing satellites is described. This document is applicable to the design of microwave frequency satellite-to-ground data transmission links for remote sensing satellites. The design of microwave frequency satellite-to-ground data transmission links for other types of satellites is also applicable. Follow the instructions.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 11299.4-1989 Satellite communication earth station radio equipment measurement methods Part 1.Subsystem and subsystem combination communication Measurements Section 4.Baseband Measurements GB/T 11299.12-1989 Satellite communication earth station radio equipment measurement methods Part 3.Subsystem combined measurement Section 2.4~6GHz receiving system quality factor (G/T) measurement GB/T 12639-2021 On-orbit test method for geosynchronous orbit communication satellite payload ITU-RP.618-14-2023 Propagation data and prediction methods required for the design of Earth-to-space telecommunication systems

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 A channel that directly transmits data from the output port of a satellite data transmission system through space to the output port of a ground receiving system. 3.2 Two different orthogonal polarization electromagnetic wave signals that meet the polarization isolation requirements are used for communication at the same time. Note. Left-hand circularly polarized and right-hand circularly polarized electromagnetic wave signals in the same frequency band are usually used. 3.3 The product of the power applied to an antenna and the absolute gain of the antenna in a given direction. [Source. GB/T 14733.10-2024, 3.2.2.11] 3.4 Modulation loss demodulationloss The losses incurred by the satellite data transmission system during the modulation, amplification and transmission of electromagnetic wave signals.

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