一种基于北斗三号系统的GNSS-R海面干涉测高技术

王冬伟; 孙越强; 王先毅; 白伟华; 杜起飞; 夏俊明; 韩英

doi:10.11728/cjss2022.03.210315029

一种基于北斗三号系统的GNSS-R海面干涉测高技术

doi: 10.11728/cjss2022.03.210315029

王冬伟^{1, 2, 3, 4, 5,},
孙越强^{1, 2, 3, 4, 5},
王先毅^{1, 2, 3, 4, 5},
白伟华^{1, 2, 3, 4, 5},
杜起飞^{1, 3, 4, 5},
夏俊明^{1, 2, 3, 4, 5},
韩英⁶

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

基金项目: 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）和中国科学院青年创新促进会基金（2018180）共同资助

详细信息

作者简介:
王冬伟：E-mail：wangdongwei@nssc.ac.cn

中图分类号: TN98
计量
- 文章访问数: 125
- HTML全文浏览量: 33
- PDF下载量: 30
- 被引次数: 0
出版历程
- 收稿日期: 2021-03-13
- 录用日期: 2021-12-15
- 修回日期: 2022-01-15
- 网络出版日期: 2022-05-26

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

WANG Dongwei^{1, 2, 3, 4, 5
,},
SUN Yueqiang^{1, 2, 3, 4, 5},
WANG Xianyi^{1, 2, 3, 4, 5},
BAI Weihua^{1, 2, 3, 4, 5},
DU Qifei^{1, 3, 4, 5},
XIA Junming^{1, 2, 3, 4, 5},
HAN Ying⁶

1.
National Space Science Center, Chinese Academy of Sciences, Beijing 100190
2.
University of Chinese Academy of Sciences, Beijing 100049
3.
Beijing Key Laboratory of Space Environment Exploration, Beijing 100190
4.
Key Laboratory of Environmental Space Situation Awareness Technology, Chinese Academy of Sciences, Beijing 100190
5.
Joint Laboratory on Occultations for Atmosphere and Climate, Beijing 100190
6.
Department of Mathematics and Physics, Beijing Institute of Petrochemical Technology, Beijing 102617

摘要

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 /
- 北斗三号 /
- 干涉测高技术 /
- 本地码测高技术
Abstract: 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.
- GNSS-R /
- Beidou-3 /
- Interferometric altimetry /
- Local code altimetry

HTML全文

图 1 本地码测高技术工作原理

Figure 1. Diagram of local code tracking technology

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图 2 干涉测高技术工作原理

Figure 2. Diagram of interferometric tracking technology

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图 3 GPS L1频段干涉测高与GPS L1本地码测高波形

Figure 3. GPS L1 C/A and L1 interferometric ACF results

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图 4 不同波形因子K和信号载噪比CNR与测高精度的关系

Figure 4. Relationships between K, CNR and the height precision

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图 5 非相干累加次数与测高精度的关系

Figure 5. Relationship between incoherent integration count and the height precision

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图 6 干涉信噪比SNR与测高精度的关系

Figure 6. Relationships between SNR and the height precision

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图 7 B1频段信号带宽与测高精度的关系

Figure 7. Relationship between the B1 bandwidth and height precision

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图 8 GNSS-R干涉测高接收机整体结构

Figure 8. GNSS-R interferometric altimeter receiver structure

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图 9 BD (a)，GPS (b)和GAL (c)实测干涉测高波形

Figure 9. Received BD (a), GPS (b) and GAL (c) interferometric tracking waveforms

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图 10 BD (a)，GPS (b)和GAL (c)实测本地码测高波形

Figure 10. Received BD (a), GPS (b) and GAL (c) local code tracking waveforms

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图 11 北斗三号干涉测高与本地码测高波形的对比

Figure 11. Comparison between BD3 interference and BD2 B1 local tracking results

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表 1 本地码测高技术与干涉测高技术可利用的GNSS信号对比

Table 1. Available GNSS signals using interference and local code tracking technology

导航系统	频段	码型及带宽/MHz	本地测高技术可使用码型	本地测高技术可利用带宽/MHz	干涉测高技术可使用码型	干涉测高技术可利用带宽/MHz
GPS	L1	L1C/A+L1P（授权）+ M（授权）（32.736）	L1C/A	2.046	L1C/A+L1P+M	32.736
	L2	L2C+L2P（授权）（20.46）	L2C	2.046	L2C+L2P	20.46
	L5	L5I+L5Q （20.46）	L5I+L5Q	20.46	L5I+L5Q	20.46
BDS	B1I	B1I（4.092）	B1I	4.092	B1I	4.092
	B1C	B1C（32.736）	B1C	32.736	B1C	32.736
	B2	B2A+B2B（51.15）	B2A或B2B	20.46	B2A+B2B	51.15
	B3I	B3I（20.46）	B3I	20.46	B3I	20.46
GAL	E1	E1B+E1C（32）	E1B或E1C	4.092	E1B+E1C	32
	E5	E5a+E5b（51.15）	E5a或E5b	20.46	E5a+E5b	51.15
	E6	E6B+E6C（40.92）	授权	–	E6B+E6C	40.92

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表 2 水面高度计算结果（单位m）

Table 2. Results of the water surface height (unit m)

跟踪类型	卫星号	时间段（UT）	高度标准差
GPS L1本地码	G17	2019-09-27 01:14－1:44	0.78
北斗B1 本地码	B13	2019-09-27 08:18－8:48	0.90
北斗三号B1 干涉	B19	2019-09-27 09:10－9:40	0.14
北斗三号B2干涉	B22	2019-09-27 11:29－11:59	0.12

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