海洋二号卫星微波散射计自然扩展目标在轨定标
In-orbit Calibration of Haiyang-2 Scatterometer Using Natural Land-extended Targets
查看参考文献12篇
文摘
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海洋二号卫星微波散射计(HY-2 Scatterometer, HY-2 SCAT)是一种旋转扫描笔形波束散射计,能够对同一观测面元提供4次方位角和入射角的观测组合,并通过地球物理模型反演海面风场.为达到设计的风场反演精度,要求其系统定标精度达到0.5dB.利用不同区域自然扩展目标对HY-2 SCAT进行在轨外定标,并与OSCAT 散射计在同时期内的测量结果进行了对比.定标结果显示可以消除因散射计天线指向偏差带来的方位向测量误差. 针对HY-2 SCAT方位向测量偏差进行了误差分析,利用仿真方法以及海洋二号卫星雷达高度计同期测量数据的反演结果进行比对,验证了误差来源. |
其他语种文摘
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The scatterometer onboard Haiyang-2 satellite (HY-2 SCAT) is a rotating pencil-beam scatteromter. It provides 4 times of radar cross-section (σ0) measurements at different azimuth/incidence angles over a wind vector cell, in order to determine the near-surface wind field using the Geophysical Model Function (GMF). To achieve the required wind vector accuracy, radar cross-section measurements must be calibrated within a few tenths of a decibel (within 0.5 dB). In this paper, HY-2 SCAT is calibrated using natural land-extended targets over different regions and is compared with OSCAT. σ~0 errors over different azimuth angles are eliminated. The error sources of the measurements are analyzed and the pointing errors are compared with that estimated from measurements of Altimeter onboard HY-2 satellite. |
来源
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空间科学学报
,2015,35(2):244-252 【核心库】
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关键词
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海洋二号卫星
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微波散射计
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在轨定标
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自然扩展目标
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指向角偏差
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地址
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中国科学院空间科学与应用研究中心, 中国科学院微波遥感技术重点实验室, 北京, 100190
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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0254-6124 |
学科
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自动化技术、计算机技术;航天(宇宙航行) |
基金
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国家自然科学基金
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文献收藏号
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CSCD:5363302
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参考文献 共
12
共1页
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1.
朱金台. Ku波段旋转扫描扇形波束散射计地面扩展目标在轨定标.
电子与信息学报,2013,35(8):1793-1799
|
被引
6
次
|
|
|
|
2.
Jiang X W. The HY-2 satellite and its preliminary assessment.
Int. J. Digit. Earth,2012,5(3):266-281
|
被引
32
次
|
|
|
|
3.
Wang X N. In-orbit calibration and performance evaluation of HY-2 scatterometer.
IEEE International Geoscience and Remote Sensing Symposium,2012
|
被引
1
次
|
|
|
|
4.
Long D G. Calibration of spaceborne scatterometer using tropical rain forests.
IEEE Trans. Geosci. Remote Sens,1996,34(2):413-424
|
被引
6
次
|
|
|
|
5.
邹巨洪. HY2散射计高分辨率sigma0图像重构技术在台风风场反演中的仿真研究.
高技术通讯,2012,22(7):713-720
|
被引
2
次
|
|
|
|
6.
Elyouncha A. A method for cross-comparison of scatterometer data using natural distributed targets: application to ERS-1 and ERS-2 data during the tandem mission.
Proc of SPIE, Remote Sensing of the Ocean, Sea Ice, Coastal Waters and Large Water Regions 2012,2012
|
被引
1
次
|
|
|
|
7.
Zec J. NSCAT normalized radar backscattering coefficient biases using homogenous land targets.
J. Geophys. Res. Ocean,1999,104(C5):11557-11568
|
被引
1
次
|
|
|
|
8.
Zec J. SeaWinds beam and slice balance using data over Amazonian rainforest.
IEEE International Geoscience and Remote Sensing Symposium,2000
|
被引
1
次
|
|
|
|
9.
Kunz L B. Calibrating SeaWinds and QuikSCAT scatterometers using natural land targets.
IEEE Geosci. Remote Sens. Lett,2005,2(2):182-186
|
被引
3
次
|
|
|
|
10.
Stoffelen A. A simple method for calibration of a scatterometer over the ocean.
J. Atmos. Ocean Tech,1999,16(2):275-282
|
被引
5
次
|
|
|
|
11.
Bhowmich S A. Cross calibration of the OceanSAT-2 scatterometer with QuikSCAT scatterometer using natural terrestrial targets.
IEEE Trans. Geosci. Remote Sens,2013(99):1-6
|
被引
1
次
|
|
|
|
12.
Brown G. The average impulse response of a rough surface and its applications.
IEEE Trans. Antenn. Prop,1977,25(1):67-74
|
被引
40
次
|
|
|
|
|