Simulation Research on L Band Scatterometer System

CHEN Zi-hao; LIN Wen-ming; MA Jian-ying; YUN Ri-sheng; ZHU Di; DONG Xiao-long; HE Yi-jun

doi:10.12263/DZXB.20220564

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Simulation Research on L Band Scatterometer System

PAPERS | 更新时间：2025-12-08

- Simulation Research on L Band Scatterometer System
- ACTA ELECTRONICA SINICA Vol. 51, Issue 11, Pages: 3215-3224(2023)
- 作者机构：
  
  1.南京信息工程大学海洋科学学院,江苏南京 210044
  2.中国科学院国家空间科学中心,北京 100190
  3.中国科学院大学,北京 100049
  4.自然资源部空间海洋遥感与应用重点实验室,北京 100081
- 作者简介：
- 基金信息：
  
  Key Laboratory Foundation of Microwave Remote Sensing Technology, Chinese Academy of Sciences(WX-N21-05-04)
- DOI：10.12263/DZXB.20220564
  CLC： TP732.1;
- Received：20 May 2022，
  
  Revised：2022-08-02，
  
  Published：25 November 2023
- 稿件说明：
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陈仔豪,林文明,马剑英等.L波段散射计系统仿真研究[J].电子学报,2023,51(11):3215-3224.

CHEN Zi-hao,LIN Wen-ming,MA Jian-ying,et al.Simulation Research on L Band Scatterometer System[J].ACTA ELECTRONICA SINICA,2023,51(11):3215-3224.
陈仔豪,林文明,马剑英等.L波段散射计系统仿真研究[J].电子学报,2023,51(11):3215-3224. DOI： 10.12263/DZXB.20220564.

CHEN Zi-hao,LIN Wen-ming,MA Jian-ying,et al.Simulation Research on L Band Scatterometer System[J].ACTA ELECTRONICA SINICA,2023,51(11):3215-3224. DOI： 10.12263/DZXB.20220564.

摘要

对于海表盐度微波遥感，海面粗糙度引起的辐射亮度温度变化与海表盐度的贡献相当甚至更大.因此，海表盐度遥感不仅要利用对盐度敏感的L波段微波频率进行高精度的辐射亮温测量，还要利用同步搭载的L波段散射计获取海面粗糙度信息并进行矫正.这对提高海表盐度测量精度具有重要作用.本文针对我国首个海面盐度遥感卫星主被动微波盐度计的L波段散射计开展研究，建立了一种多波束推帚式星载微波散射计的系统仿真模型；对比分析了雷达脉冲参数对该系统测量精度的影响，并进行了信号带宽和不同极化方式脉冲数配置的优化设计.研究表明，在L波段散射计的基线参数下，脉冲带宽为1.5 MHz、脉冲重复频率为100 Hz时，可实现同极化后向散射测量精度优于0.1 dB的指标.

Abstract

For the microwave remote sensing of sea surface salinity (SSS)

the brightness temperature changes induced by the sea surface roughness are equivalent or even larger than those caused by the sea surface salinity. Consequently

the remote sensing of sea surface salinity should not only use L band microwave frequency

which is sensitive to SSS

for accurate brightness temperature measurement

but also use L-band scatterometer to estimate the sea surface roughness simultaneously. This plays a major role in improving the accuracy of sea surface salinity measurement. This paper studies the L band microwave scatterometer onboard the first Chinese ocean salinity mission. A simulation model is developed for the L-band multiple-beam push-brooming microwave scatterometer system. With the simulation model

the impact of radar pulse parameters

including the signal bandwidth and the pulse configuration of different polarizations on the system performance

is analyzed

and the design is optimized accordingly. The results show that under the baseline parameters of the L band scatterometer

the co-polarized backscattering measurement accuracy can be better than 0.1 dB when the pulse bandwidth is 1.5 MHz and the pulse repetition frequency is 100 Hz.

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references

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