一种基于北斗三号系统的GNSS-R海面干涉测高技术  

A New GNSS-R Interferometric Ocean Altimetry Using Beidou-3 Signal

作　　者：王冬伟 孙越强[1,2,3,4,5] 王先毅 白伟华[1,2,3,4,5] 杜起飞 夏俊明[1,2,3,4,5] 韩英 WANG Dongwei;SUN Yueqiang;WANG Xianyi;BAI Weihua;DU Qifei;XIA Junming;HAN Ying(National Space Science Center,Chinese Academy of Sciences,Beijing 100190;University of Chinese Academy of Sciences,Beijing 100049;Beijing Key Laboratory of Space Environment Exploration,Beijing 100190;Key Laboratory of Environmental Space Situation Awareness Technology,Chinese Academy of Sciences,Beijing 100190;Joint Laboratory on Occultations for Atmosphere and Climate,Beijing 100190;Department of Mathematics and Physics,Beijing Institute of Petrochemical Technology,Beijing 102617)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100049 [3]天基空间环境探测北京市重点实验室,北京100190 [4]中国科学院空间环境态势感知技术重点实验室,北京100190 [5]掩星探测与大气气候应用国际联合实验室,北京100190 [6]北京石油化工学院数理系,北京102617

出　　处：《空间科学学报》2022年第3期492-499,共8页Chinese Journal of Space Science

基　　金：国家自然科学基金项目(41505030,41606206,41775034);中国科学院科研装备研制项目(YZ201129);中国科学院青年创新促进会基金(2018180)共同资助。

摘　　要：GNSS-R干涉测高技术可用于中尺度海面高度观测,具有空间分辨率高、测量精度高等优势。与传统的GNSS-R本地码测高技术相比,GNSS-R干涉测高技术可以有效提升高度测量精度。虽然GNSS-R干涉测高技术已有一些研究,但是基于北斗三号的干涉测高应用还很少。本文根据GNSS-R干涉测高技术优势,针对北斗三号系统在干涉测高技术上的应用,研发了支持北斗三号的GNSS-R干涉测高接收机并描述了整体架构及实现。利用所研发的接收机进行水面干涉测高试验,首次获取了北斗三号B1和B2干涉测高波形,与传统GPS L1和北斗B1本地码测高波形进行对比。对两种方法计算出的水面高度进行对比,结果显示北斗三号干涉测高精度明显优于GPS L1和北斗B1传统本地码测高精度。GNSS-R interferometric altimetry can be used for meso-scale sea level observation with the advantages of high spatial resolution and high measurement accuracy.Compared with the traditional GNSS-R which uses local code tracking for altimetry,GNSS-R interferometric could effectively improve the altimetry accuracy.Although a lot of researches had been carried out in GNSS-R interferometric altimetry around the world,there are few researches in the application of interferometric altimetry using Beidou-3 signal.This article introduces the basic theory of GNSS-R interferometric altimetry technology and its advantages.Aiming at the application of Beidou-3 signal in interferometric altimetry,a GNSS interferometric altimetry instrument had been developed.The overall architecture and implementation of this new instrument is introduced in this paper.An open-field GNSS-R water surface altimetry experiments was conducted using this instrument.In the experiment,the interferometric waveforms generated from Beidou-3 B1 and B2 signal were obtained for the first time,and were compared with the traditional GPS L1 and Beidou-2 B1 local code tracking waveforms.Finally,the inversion results of the water surface height calculated by the two approaches are compared.The comparison results show that the precision of Beidou-3 system’s interferometric measurement is significantly better than that of GPS L1 and Beidou-2 B1 traditional local code altimetry.

关 键 词：GNSS-R 北斗三号 干涉测高技术 本地码测高技术 

分 类 号：TN98[电子电信—信息与通信工程]