Performance Assessment of Coastal Sea Surface Height Measurement Using Opportunity-Source Signal from GEO Satellite

被引：0
|
作者：
Wang F. [1 ,2 ]
Yang D.-K. [2 ]
机构：
[1] State Key Laboratory of Geo‑Information Engineering, Shaanxi, Xi’an
[2] School of Electronic Information Engineering, Beihang University, Beijing
来源：
Tien Tzu Hsueh Pao/Acta Electronica Sinica | 2024年 / 52卷 / 03期
基金：
中国博士后科学基金;
关键词：
GEO satellite; incoherent integration; opportunity‑source remote sensing; sea surface height; signal bandwidth; signal‑to‑noise ratio (SNR);
D O I：
10.12263/DZXB.20220826
中图分类号：
学科分类号：
摘要：
It is potential to measure sea surface height using opportunity of source from geostationary earth orbit (GEO) satellites. Most studies focus on the experimental demonstrations, but few works comprehensively assess its perfor⁃ mance. Based on this, the paper evaluates the influence of the signal bandwidth, incoherent integration number, signal‑to‑ noise ratio (SNR) and retracking algorithm on the oceanic altimetry performance. It is found that once the incoherent inte⁃ gration number and SNR are over the optimal incoherent integration number and SNR, the improvements of the altimetry performances are insignificant. Therefore, choosing optical incoherent average number, and designing the receiver antenna gain, radio‑frequency gain, and receiver bandwidth to obtain optical SNR are needed. The fitting method can provide a bet⁃ ter precision than the interpolation method. The data from the BeiDou B3I signal and ASTRA 19.2 E satellite experiments are used to assess the GEO opportunity‑source altimetry. The experiment results show that for the incoherent average num⁃ ber and SNR over 10 000 and 7 dB, respectively, the altimetry precision of about 0.20 m and 0.10 m can be obtained, re⁃ spectively. Due to multi‑frequency or multi‑channel transmission, the spectral synthesis is proposed to improve the altime⁃ try precision. The simulation results show that the synthetized signal from 10‑channel signals of Zhongwei‑1 satellite pro⁃ vides a precision of 3.50 cm and 0.69 cm for the interpolation and fitting method. © 2024 Chinese Institute of Electronics. All rights reserved.
引用
收藏
页码：719 / 728
页数：9
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