|
|
- 2018
GNSS-MR技术用于雪深探测的初步研究
|
Abstract:
积雪是全球水循环中的重要组成部分，积雪深度与雪水当量的精确监测对全球气候变化研究极其重要。随着GNSS研究与应用的不断深入，基于多路径效应的GNSS-MR （GNSS multipath reflectometry）技术用于地表环境监测（植被、土壤湿度、雪深、海平面等）已成为一种新兴的遥感手段。分析了SNR （signal-to-noise ratio）信噪比值的变化特性，详细给出了基于SNR观测值的GNSS-MR技术探测雪深的基本原理及其计算流程图。为了验证算法的有效性，利用科罗拉多州17 d连续跟踪站NWOT的GPS数据反演了降雪厚度，其结果与实测的雪深记录数据吻合较好，误差均值为0.07 m。初步研究结果验证了GNSS-MR技术用于积雪深度探测的可行性，并为后续充分利用现有的全球密集GNSS跟踪站数据开展地表环境监测提供重要参考
| [1] | Larson K M, Small E E, Gutmann E, et al. Using GPS Multipath to Measure Soil Moisture Fluctuations:Initial Results[J]. <em>GPS Solutions</em>,2008, 12(3):173-177 |
| [2] | Larson K M, Small E E, Gutmann E D, et al. Use of GPS Receivers as a Soil Moisture Network for Water Cycle Studies[J]. <em>Geophysical Research Letters</em>,2008, 35(24):1-5 |
| [3] | Larson K M, Nievinski F G. GPS Snow Sensing:Results from the EarthScope Plate Boundary Observatory[J].<em> GPS Solutions</em>, 2013, 17(1):41-52 |
| [4] | Lv C X,Zhang X H. Measuring Snow Depth with GPS Triple-frequency Carrier Phase Observations[C]. International Workshop on GNSS Remote Sensing for Future Missions and Sciences, Shanghai, 2011 |
| [5] | Wei W, Larson K M, Small E E, et al. Using Geodetic GPS Receivers to Measure Vegetation Water Content[J]. <em>GPS Solutions</em>,2015, 19(2):237-248 |
| [6] | Xu Bin, Yang Tao,Tan Baohua, et al. The Simulate Study of Detection Based on Lomb-Scargle Algorithm[J]. <em>Nuclear Electronics & Detection Technology</em>, 2011, 31(6):702-705(徐斌, 杨涛, 谭保华, 等. 基于Lomb-Scargle算法的周期信号探测的模拟研究[J]. <em>核电子学与探测技术</em>, 2011, 31(6):702-705) |
| [7] | Martin-Neira M. A Passive Reflectometry and Interferometry System(PARIS):Application to Ocean Altimetry[J].<em> ESA Journal</em>, 1993, 17:331-355 |
| [8] | Liu Jingnan, Shao Lianjun, Zhang Xunxie. Advances in GNSS-R Studies and Key Technologies[J]. <em>Geomatics and Information Science of Wuhan University</em>. 2007, 32(11):955-960(刘经南, 邵连军, 张训械. GNSS-R研究进展及其关键技术[J]. <em>武汉大学学报·信息科学版</em>, 2007, 32(11):955-960) |
| [9] | Ozeki M, Heki K. GPS Snow Depth Meter with Geometry-free Linear Combinations of Carrier Phases[J]. <em>Journal of Geodesy</em>,2011,86(3):209-219 |
| [10] | Jin S G, Najibi N. Sensing Snow Height and Surface Temperature Variations in Greenland from GPS Reflected Signals[J]. <em>Advances in Space Research</em>, 2014, 53(11):1623-1633 |
| [11] | Bilich A, Larson K M, Axelrad P. Observations of Signal-to-noise Ratios (SNR) at Geodetic GPS Site CASA:Implications for Phase Multipath[J]. <em>Proceedings of the Centre for European Geodynamics and Seismology</em>, 2004, 23:77-83 |
| [12] | Ao Minsi, Zhu Jianjun, Hu Youjian, et al. Comparative Experiments on SoilMoisture Monitoring with GPS SNR Observations[J]. <em>Geomatics and Information Science of Wuhan University</em>. 2015,40(1):117-121(敖敏思,朱建军,胡友健,等. 利用SNR观测值进行GPS土壤湿度监测[J]. <em>武汉大学学报·信息科学版</em>,2015,40(1):117-121) |
| [13] | Larson K M, Gutmann E D, Zavorotny V U, et al. Can We Measure Snow Depth with GPS Receivers?[J]. <em>Geophysical Research Letters</em>,2009,36(17):1-5 |
| [14] | Small E E, Larson K M, Braun J J. Sensing Vegetation Growth with Reflected GPS Signals[J].<em> Geophysical Research Letters</em>, 2010, 37(12):1-5 |
| [15] | Gutmann E D, Larson K M, Williams M W, et al. Snow Measurement by GPS Interferometric Reflectometry:An Evaluation at Niwot Ridge, Colorado[J]. <em>Hydrological Processes</em>, 2012, 26(19):2951-2961 |
