Satellite-Ground Integrated External Calibration of the WindRAD Scatterometer Onboard FY-3E Satellite

被引：0

作者：

Shang, Jian ^{[1
]}

Shi, Haoqiang ^{[2
]}

Yuan, Mei ^{[1
]}

Wu, Qiong ^{[1
]}

Lv, Ailing ^{[2
]}

Dou, Fangli ^{[1
]}

Yin, Honggang ^{[1
]}

Liu, Lixia ^{[2
]}

Hu, Xiuqing ^{[1
]}

机构：

[1] Natl Satellite Meteorol Ctr, Natl Ctr Space Weather, Innovat Ctr FengYun Meteorol Satellite FYSIC, Key Lab Radiometr Calibrat & Validat Environm Sate, Beijing 100081, Peoples R China

[2] China Aerosp Sci & Technol Corp, Branch China Acad Space Technol, Xian 710000, Peoples R China

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2025年 / 63卷

基金：

中国国家自然科学基金;

关键词：

Calibration; Spaceborne radar; Satellites; Radar measurements; Antenna measurements; Sea measurements; Receiving antennas; Data processing; Transmitting antennas; Time measurement; Active radar calibrator (ARC); backscattering coefficient; external calibration; FengYun-3E (FY-3E) satellite; scatterometer; wind radar (WindRAD); VALIDATION;

D O I：

10.1109/TGRS.2025.3526834

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The first scatterometer onboard Chinese meteorological satellites is a dual-frequency and dual-polarization scatterometer named Wind Radar (WindRAD). It uses an advanced fan-beam conical scanning mechanism to acquire wind vector observation of global ocean surfaces and other geophysical parameters. Since the launch in 2021, external calibration using ground-based active radar calibrator (ARC) has been carried out to evaluated WindRAD in-orbit situation and observation accuracy. Satellite-ground integrated external calibration process is proposed, and optimal satellite-ground observation mode is specially designed for the WindRAD, greatly reducing the complexity of satellite-ground interaction and improving the efficiency of external calibration observation. This article proposes the algorithm of WindRAD external calibration, with comprehensive consideration of scientific nature and engineering realizability. WindRAD in-orbit observation data as well as ARC data were used to calculate the real antenna patterns and absolute calibration coefficients of each polarization for both C- and Ku-bands. The evaluation results revealed that the in-orbit antenna pattern hadn't changed much compared with the prelaunch test result, which for the first time confirmed the correctness of the key parameters used in WindRAD calibration. Moreover, the calibration accuracy is better than 1 dB. For the first time, the stability of WindRAD in orbit is confirmed using external active reference target.

引用

页数：10

共 25 条

[21] COMPARISON SIMULATED BRIGHTNESS TEMPERATURE BY RTTOV-11 WITH THE MEASUREMENTS FROM MWHS-II ONBOARD FY-3C SATELLITE [J].

Huang Yingzhu ;

Wang Zhenzhan .

2016 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS), 2016, :392-395

[22] Evaluation of the in-orbit performance of the microwave temperature sounder onboard the FY-3D satellite using different radiative transfer models [J].

Han, Yang ;

Hou, Xueyan .

JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER, 2020, 253

[23] Reliable Uplink Synchronization Maintenance for Satellite-Ground Integrated Vehicular Networks: A High-Order Statistics-Based Timing Advance Update Approach [J].

Zhen, Li ;

Wang, Yue ;

Yu, Keping ;

Lu, Guangyue ;

Mumtaz, Zahid ;

Wei, Wei .

IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, 2023, 24 (02) :2097-2110

[24] A Lightweight Transformer-Based Collision Detection and Load Estimation Scheme for Massive Random Access in 6G Satellite-Ground Integrated Vehicular Networks [J].

Zhen, Li ;

Li, Mingyang ;

Chakraborty, Chinmay ;

Jiang, Jing ;

Polavarapu, Ashok ;

Alqahtani, Fayez .

IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS, 2025,

[25] Inter-Calibration of Passive Microwave Satellite Brightness Temperature Observations between FY-3D/MWRI and GCOM-W1/AMSR2 [J].

Xu, Zuomin ;

Sun, Ruijing ;

Wu, Shuang ;

Shao, Jiali ;

Chen, Jie .

REMOTE SENSING, 2024, 16 (02)

← 1 2 3 →