GNSS-IR解译地表环境参数研究进展及展望

周昕; 张双成; 张勤; 刘奇; 马中民; 刘宁

doi:10.12265/j.gnss.2023061

GNSS-IR解译地表环境参数研究进展及展望

doi: 10.12265/j.gnss.2023061

周昕^1,,
张双成^{1, 2, ,},
张勤^1,,
刘奇^1,,
马中民^1,,
刘宁^1,

1.
长安大学地质工程与测绘学院, 西安 710054
2.
地理信息工程国家重点实验室, 西安 710054

基金项目: 国家自然科学基金(42074041，42127802)；国家重点研发计划(2019YFC1509802)；地理信息工程国家重点实验室基金(SKLGIE2022-ZZ2-07)

详细信息

作者简介:
周昕：(1998—)，男，博士研究生，主要研究方向为地基GNSS遥感与应用

张双成：(1979—)，男，博士生导师，副教授，主要研究方向为卫星导航与定位、GNSS遥感、地质灾害监测预警等研究

张勤：(1958—)，女，博士生导师，教授，主要研究方向为空间大地测量GPS与InSAR高精度数据处理与应用、GNSS遥感、地质灾害监测与防治等

刘奇：(1994—)，男，博士研究生，主要研究方向为GNSS遥感理论与应用

通讯作者:
张双成 E-mail: shuangcheng369@chd.edu.cn

中图分类号: P227
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- HTML全文浏览量: 123
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- 被引次数: 0
出版历程
- 收稿日期: 2023-03-26

Research progress and prospects of GNSS-IR interpretation of surface environmental parameters

ZHOU Xin^1
,,
ZHANG Shuangcheng^{1, 2
, ,},
ZHANG Qin^1
,,
LIU Qi^1
,,
MA Zhongmin^1
,,
LIU Ning^1
,

1.
School of Geological Engineering and Geomatics Chang’an University, 710054, China
2.
State Key Laboratory of Geo-Information Engineering, 710054, China

摘要

摘要: 全球卫星导航系统(GNSS)具有全天候、近实时、高精度的特点，可持续发射L波段信号，广泛应用于定位、导航和授时(PNT). 随着GNSS研究与应用的不断深入，全球定位系统干涉反射(GNSS-IR)技术为地表参数探测提供了一种全新的手段. GNSS无线电导航信号经不同地表介质(如土壤、积雪、水面等)反射后，被反射的GNSS多路径信号承载反射面的特性信息，通过对GNSS反射信号中振幅、相位和频率等参数的分析，可有效获取地表反射面的物理参数. GNSS-IR作为当前GNSS和遥感领域的研究热点，取得了一些研究进展和成果. 本文详细介绍了GNSS-IR原理和方法及该技术在土壤湿度、植被、积雪和水位等方面的应用进展，并在此基础上，提出GNSS-IR研究中存在的问题及发展方向.
- 全球卫星导航系统(GNSS) /
- 多路径效应 /
- 信噪比(SNR) /
- 地表环境参数
Abstract: The Global Navigation Satellite System (GNSS) has the characteristics of all-weather, near real-time, and high accuracy, and can continuously transmit L-band signals, which are widely used for positioning, navigation, and timing (PNT). As the research and application of GNSS continue to grow, the Global Positioning System Interferometric Reflectometry (GNSS-IR) technology provides a new means of surface parameter detection. After the GNSS radio navigation signal is reflected by different surface media (such as soil, snow, water surface, etc.), the reflected GNSS multipath signals carry the characteristic information of the reflecting surface, and the physical parameters of the surface reflecting surface can be effectively obtained through the analysis of parameters such as amplitude, phase, and frequency in GNSS reflecting signals. GNSS-IR, as a current research hotspot in the field of GNSS and remote sensing, has made some research progresses and achievements. This paper introduces in detail the principle and method of GNSS-IR and the progress of the application of this technology in soil moisture, vegetation, snow and water level. Based on this, problems and development directions in GNSS-IR research are presented.
- Global Navigation Satellite System(GNSS) /
- multi-path effect /
- signal-to-noise ratio /
- surface environmental parameters

HTML全文

图 1 测站多路径误差与高度角对比图

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图 2 PRN06卫星信号的SNR变化图

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图 3 GNSS-IR技术示意图

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图 4 PRN07卫星SNR及去趋势项后的SNR观测值

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图 5 GNSS解译土壤湿度与位移监测序列^[30]

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图 6 形变速率与解译土壤湿度关系^[30]

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图 7 相位与原位土壤湿度比较^[45]

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图 8 负振幅和MODIS NDVI对比结果^[45]

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图 9 软件主界面^[62]

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图 10 SC02和GTGU站点估算的海面高度变化^[73]

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