中国科学院机构知识库网格系统: 检索

Monitoring the Performance of HY-2B and Jason-2/3 Sea Surface Height via the China Altimetry Calibration Cooperation Plan 期刊论文 OAI收割
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2022, 卷号: 60, 页码: 13
作者: Yang, Lei; Xu, Yongsheng; Lin, Mingsen; Ma, Chaofei; Mertikas, Stelios P.

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收藏 | 浏览/下载：51/0 | 提交时间：2022/07/18

Calibration Satellites Altimetry Tides Global navigation satellite system Monitoring Meteorology Calibration and validation (Cal Val) Global Navigation Satellite System (GNSS) HY-2B Jason satellite radar altimeter sea level tide gauge

Applications of differential barometric altimeter in ground cellular communication positioning network 期刊论文 OAI收割
IET SCIENCE MEASUREMENT & TECHNOLOGY, 2020, 卷号: 14, 期号: 3, 页码: 322-331
作者: Hu, Zhengqun; Zhang, Lirong; Ji, Yuanfa

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收藏 | 浏览/下载：22/0 | 提交时间：2021/12/06

cellular radio height measurement measurement errors Global Positioning System altimeters barometers least squares approximations Kalman filters surface fitting spread spectrum communication compensation matrix algebra GPS signal message structure power spectrum spread spectrum ranging signal fitting parameters least-square solution calibration compensation system noise variance matrix measurement noise variance matrix multibase station correction height information correction calculation DBA system systematic performance differential barometric altimeter ground cellular communication positioning network measurement datum distribution altitude positioning error Global Positioning System differential barometric altimetry system systematic implementation level continuous altitude measurement precise altitude measurement DBA systematic implementation aspect two dimensional curved surface fitting function sensor measurement correction filtering effect Kalman filter measuring station multiBSs navigation fusion

Research on the Calibration Technique of the Low-Light-Level Remote Sensing Camera 会议论文 OAI收割
Xiamen, PEOPLES R CHINA, 2020-08-25
作者: Bai, Zhe; Ma, Yilong; Pan, Yue; Pang, Zhihai; Zhao, Hui

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收藏 | 浏览/下载：24/0 | 提交时间：2021/06/04

Low-Light-Level Remote sensing camera ICCD Radiometric calibration Non-uniformity correction

A novel method for horizontal level calibration of a manipulator testing equipment 会议论文 OAI收割
Sydney, Australia, December 2-4, 2019
作者: Zhang X(张啸); He Y(贺云); Xu ZG(徐志刚); Liu Y(刘勇); Zhang XY(张晓扬)

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收藏 | 浏览/下载：27/0 | 提交时间：2020/05/03

level calibration system identification data acquisition

Global Statistical Assessment and Cross-Calibration with Jason-2 for Reprocessed HY-2A Altimeter Data 期刊论文 OAI收割
MARINE GEODESY, 2018, 卷号: 41, 期号: 3, 页码: 289-312
作者: Jiang, Maofei; Xu, Ke; Liu, Yalong; Jiang, MF (reprint author), Chinese Acad Sci, Natl Space Sci Ctr, Key Lab Microwave Remote Sensing, 1 Nanertiao, Beijing 100190, Peoples R China.

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收藏 | 浏览/下载：19/0 | 提交时间：2018/07/04

Altimetry Calibration Validation Hy-2a Mean Sea Level Sea Level

A PRELIMINARY IN SITU CALIBRATION FOR HY-2A SATELLITE ALTIMETER 会议论文 OAI收割
36th IEEE International Geoscience and Remote Sensing Symposium (IGARSS), Beijing, PEOPLES R CHINA, JUL 10-15, 2016
作者: Liu, Yalong; Xu, Ke; Song, Yang; Zhang, Youguang

收藏 | 浏览/下载：19/0 | 提交时间：2017/04/07

HY-2A altimeter absolute Calibration Sea level

Wavelet Neural Modeling for Hydrologic Time Series Forecasting with Uncertainty Evaluation SCI/SSCI论文 OAI收割
2015
作者: Sang Y. F.; Wang, Z. G.; Liu, C. M.

收藏 | 浏览/下载：34/0 | 提交时间：2015/12/09

Hydrologic time series analysis Probabilistic forecasting Uncertainty evaluation Wavelet neural model Monte-Carlo simulation monthly rainfall practical guide prediction networks precipitation decomposition sensitivity calibration level

A sub-pixel extraction method for the center of the circular structure from spot array calibration target (EI CONFERENCE) 会议论文 OAI收割
2012 3rd International Conference on Information Technology for Manufacturing Systems, ITMS 2012, September 8, 2012 - September 9, 2012, Qingdao, China
作者: Liu Y.; Zhang T.; Yang H.; Gao X.; Liu Y.

收藏 | 浏览/下载：74/0 | 提交时间：2013/03/25

The imaging measurement system must be calibrated before application. In calibration procedure sub-pixel center extraction is the crucial step for the final accuracy. In this paper a new sub-pixel extraction method is proposed. Edge detection at pixel level is obtained using LOG operator then sub-pixel edge detection is realized using the Facet model. Finally the least squares ellipse fitting is operated on the sub-pixel edge to determine the sub-pixel center. Experiment on a series of simulated images indicates that this algorithm is able to realize the center location accuracy of 0.01-0.02 pixel and meets the requirement of sub-pixel level. (2012) Trans Tech Publications Switzerland.

High gain avalanche photodiode (APD) arrays in flow cytometer opitical system (EI CONFERENCE) 会议论文 OAI收割
2nd International Conference on Multimedia Technology, ICMT 2011, July 26, 2011 - July 28, 2011, Hangzhou, China
作者: Chen Y.; Tang Y.; Wang C.; Zhao S.

收藏 | 浏览/下载：42/0 | 提交时间：2013/03/25

The basic principles of flow cytometer are introduced on the basis of diode pump solid state laser (532 nm) as a excitation source and a high gain avalanche photodiode (APD) arrays as a light detector a verification opitical system is built. Then Spherotech Rainbow Calibration Particle RCP-30-5A is used to evaluate the performance of the opitical system the fluorescence PE signal histogram of RCP-30-5A microshphere shows that the number of individual peaks is close to eight which is close to the world advanced level. 2011 IEEE.

Research on the laboratory radiometric calibration of the thermal imager (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China
作者: Wang J.; Liu Y.; Liu Y.; Liu Y.; Sun Q.

收藏 | 浏览/下载：22/0 | 提交时间：2013/03/25

The radiometric calibration of the thermal imager was investigated to build the relationship between the input radiance and the digital output to realize the temperature measurement. The radiometric calibration was implemented in the State Key Laboratory of Applied Optics. A standard black body source was served as radiation source. The response of the thermal imager to the input radiance was tested for different gains. The experimental results show that the average grey level of the output imaging is linear dependence of the input radiance. Because the radiance in the receiving wave range of the thermal imager is linear with the black body's temperature based on Planck's law of radiation the average grey level of the output image is also linear with the black body's temperature after fitting a curve to the experiment data points. Then the relationship of the response and the gain was studied when the black body's temperature kept constant. The preliminary analysis of calibration data shows that the response of the thermal imager is linear and the average grey value of the image is directly proportion to the gain. According to the experimental results the reference gains and the dynamic range of temperature measurement were obtained. Finally the uncertainty influencing the calibration results was analyzed the analysis shows the maximal uncertainty is 5.2% which can meet the calibration requirement less than 10%. 2010 Copyright SPIE - The International Society for Optical Engineering.