机构

• 上海天文台 [3]
• 遥感与数字地球研究所 [2]
• 长春光学精密机械与物... [1]
• 紫金山天文台 [1]

采集方式

• OAI收割 [7]

内容类型

• 期刊论文 [6]
• 会议论文 [1]

发表日期

• 2016 [2]
• 2015 [2]
• 2010 [1]
• 2005 [2]

学科主题

• Remote Sen... [1]
• Spectrosco... [1]

筛选

浏览/检索结果: 共7条，第1-7条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择提交时间升序提交时间降序发表日期升序发表日期降序题名升序题名降序作者升序作者降序 Spectral Reflectance and Vegetation Index Changes in Deciduous Forest Foliage Following Tree Removal: Potential for Deforestation Monitoring 期刊论文  OAI收割 JOURNAL OF APPLIED SPECTROSCOPY, 2016, 卷号: 83, 期号: 2, 页码: 330-337 作者:  Peng, D.;  Hu, Y.;  Li, Z. 收藏  |  浏览/下载：162/0  |  提交时间：2017/04/24 SCATTERED GPS SIGNALS  OCEAN SURFACE  REFLECTED GPS  SPEED  MODEL  SPECTRUM  WAVES   An all-season sample database for improving land-cover mapping of Africa with two classification schemes 期刊论文  OAI收割 International Journal of Remote Sensing, 2016, 卷号: 37, 期号: 19, 页码: 4623-4647 作者:  Li, Congcong;  Gong, Peng;  Wang, Jie;  Yuan, Cui;  Hu, Tengyun 收藏  |  浏览/下载：52/0  |  提交时间：2017/04/24 RANDOM ROUGH SURFACES  SEA-SURFACE  ELECTROMAGNETIC SCATTERING  POLARIZATION-RATIO  APERTURE RADAR  LINEAR-SYSTEMS  GPS SIGNALS  ALGORITHM  MODEL  BACKSCATTERING   Validating the Variability of Snow Accumulation and Melting From GPS-Reflected Signals: Forward Modeling 期刊论文  OAI收割 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2015, 卷号: 63, 期号: 6, 页码: 2646-2654 作者:  Najibi, Nasser;  Jin, Shuanggen;  Wu, Xuerui 收藏  |  浏览/下载：11/0  |  提交时间：2016/09/27 GPS-reflected signals  power spectral density  snow accumulation  snow melting   Validating the Variability of Snow Accumulation and Melting From GPS-Reflected Signals: Forward Modeling 期刊论文  OAI收割 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2015, 卷号: 63, 期号: 6, 页码: 2646-2654 作者:  Najibi, Nasser;  Jin, Shuanggen;  Wu, Xuerui 收藏  |  浏览/下载：16/0  |  提交时间：2015/08/05 GPS-reflected signals  power spectral density  snow accumulation  snow melting   Embedded system of time uniform based on DSP (EI CONFERENCE) 会议论文  OAI收割 2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China 作者:  Li N.;  Liu C.-X.;  Liu C.-X.;  Chen J.;  Guo L.-H. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 We introduced a design method of DSP-based System of time uniform  which combine the GPS and the Compass to calibrate the time. The system can use UTC (Coordinated Universal Time) of the GPS or the Compass for time base  to generate absolute time and different frequency of synchronous signals. We used DSP (Digital Signal Processor) to calculate the satellite information which includes the UTC time. After getting the UCT time information  put it into the CPLD (Complex Programmable Logic Device) for correction of time delay and serialization to output. Meanwhile  we divided 1PPS (one-pulse-per-second) signal of the GPS and the Compass into 20Hz  50Hz  and 800Hz synchronous signal. And we analyzed the precision of time and frequency. To conclude  the uncertainty of system absolute time is less than 100ns  the uncertainty of system synchronous signals is less than 20ns. This system is easy and flexible for use  stable and reliable in performance. 2010 IEEE.   Filtering GPS time-series using a Vondrak filter and cross-validation 期刊论文  OAI收割 JOURNAL OF GEODESY, 2005, 卷号: 79, 期号: 6-7, 页码: 363-369 作者:  Zheng, DW;  Zhong, P;  Ding, XL;  Chen, W 收藏  |  浏览/下载：24/0  |  提交时间：2015/08/14 cross-validation  Vondrak filtering  GPS multipath signals   Seasonal and secular positional variations at eight co-located GPS and VLBI stations 期刊论文  OAI收割 JOURNAL OF GEODESY, 2005, 卷号: 79, 期号: 1-3, 页码: 71-81 作者:  Ding, XL;  Zheng, DW;  Dong, DN;  Ma, C;  Chen, YQ 收藏  |  浏览/下载：11/0  |  提交时间：2015/08/14 GPS  VLBI  station solution  seasonal signals  inter-annual variations