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FULLY AUTOMATIC FEATURE-BASED REGISTRATION OF MOBILE MAPPING AND AERIAL NADIR IMAGES FOR ENABLING THE ADJUSTMENT OF MOBILE PLATFORM LOCATIONS IN GNSS-DENIED URBAN ENVIRONMENTS
Mobile Mapping Feature Matching Image Orientation Adjustment
2017/7/12
Mobile Mapping (MM) has gained significant importance in the realm of high-resolution data acquisition techniques. MM is able to record georeferenced street-level data in a continuous (laser scanners)...
GEOREFERENCING IN GNSS-CHALLENGED ENVIRONMENT: INTEGRATING UWB AND IMU TECHNOLOGIES
Ultra-wide band GNSS-denied positioning UXO mapping
2017/7/12
Acquiring geospatial data in GNSS compromised environments remains a problem in mapping and positioning in general. Urban canyons, heavily vegetated areas, indoor environments represent different leve...
利用GNSS观测数据解算TEC的最大误差源是硬件延迟，包括卫星硬件延迟和接收机硬件延迟.在单接收机情况下，由于数据稀疏以及接收到的卫星信号时间不对齐等特点，已有的解算硬件延迟方法的求解结果往往不理想.在应用局域模式拟合方法和SCORE方法求解单接收机数据基础上，利用局域模型拟合法在电离层平静期拟合较准确的优点，提出一种联合改进方法，同时改正了SCORE方法解算过程中约束过强的缺点.通过利用GPSt...
2016年12月8日上午，由中国测绘地理信息学会大地测量与导航专业委员会和全国北斗卫星导航标准化技术委员会主办、长安大学承办的“第四届国际GNSS监测评估系统（iGMAS）技术研讨会”在西安召开，来自全国二十余家单位的100多位卫星导航领域的专家学者参加了本次研讨会。长安大学副校长沙爱民在会议上致开幕辞，向与会专家学者和代表们介绍了长安大学的基本情况和近年来在学科建设和科学研究方面的主要成绩，并对...
MONITORING HIGH-FREQUENCY OCEAN SIGNALS USING LOW-COST GNSS/IMU BUOYS
Global Navigation Satellite System (GNSS) buoys Inertial Measurement Unit (IMU) tide gauge
2016/12/1
In oceans there are different ocean signals covering the multi-frequencies including tsunami, meteotsunami, storm surge, as sea level change, and currents. These signals have the direct and significan...
INTEGRATION OF KINECT AND LOW-COST GNSS FOR OUTDOOR NAVIGATION
Kinect GNSS Low-cost Navigation Outdoor
2016/11/11
Since its launch on the market, Microsoft Kinect sensor has represented a great revolution in the field of low cost navigation, especially for indoor robotic applications. In fact, this system is endo...
基GNSS的E鸟采集系统设计及在西南油田的应用
全球导航卫星系统 E鸟数据采集 系统设计
2016/12/23
E鸟采集系统借助于GPS测量终端，接入全球导航卫星系统（GNSS）连续运行基准站，获取高精度差分坐标，对西南油田缺失的地面数据进行坐标和属性数据采集。地面数据管网采集系统由中间件和E鸟采集终端系统两部分组成，通过GPRS将数据传输到数据库中。油田利用E鸟采集系统建立了地面数据长效更新机制，实现一次投资长久使用的目的，为西南油田信息化建设及可持续发展提供强有力的技术保障，提高了地理信息成果应用水平。
CENTIMETER-LEVEL, ROBUST GNSS-AIDED INERTIAL POST-PROCESSING FOR MOBILE MAPPING WITHOUT LOCAL REFERENCE STATIONS
Differential GNSS Sensor Orientation Mobile Mapping GNSS-Aided Inertial Georeferenicng Airborne Mapping Direct Geroeferencing PPP
2016/7/28
For almost two decades mobile mapping systems have done their georeferencing using Global Navigation Satellite Systems (GNSS) to measure position and inertial sensors to measure orientation. In order ...
CONTINUOUS MAPPING OF TUNNEL WALLS IN A GNSS-DENIED ENVIRONMENT
Tunnel mapping image mosaicking image bridging visual odometry GNSS-denied
2016/7/27
The need for reliable systems for capturing precise detail in tunnels has increased as the number of tunnels (e.g., for cars and trucks, trains, subways, mining and other infrastructure) has increased...
1st International Conference on GNSS+ (ICG+2016)
multi-Global Navigation Satellite Systems signals
2016/7/22
Nowadays, multi-Global Navigation Satellite Systems (GNSS) have been developed and widely used, including US's GPS, Russia's GLONASS, China's BeiDou and EU's Galileo as well as regional systems, such ...
The annual International Symposium on GNSS has been an open forum for international researchers and practitioners -- especially in the Asia Pacific region, to discuss most recent technologies and appl...
基于GNSS的农田平整自动导航路径规划方法
农田平整 自动导航 路径规划 全球导航卫星系统
2016/12/28
为了提高农田平整作业工作效率，分析了基于全球导航卫星系统（Global navigation satellite system，GNSS）的农田平整自动导航解决方案的可行性，改进了系统硬件设计，提出了一种基于GNSS的农田平整自动导航路径规划方法。该方法将全局路径规划和局部实时路径规划相结合，以铲车空载或满载时间最短为最优评价基准，融合K 均值与密度均值，聚类农田栅格；根据设计的铲车挖高填低方...
基于GNSS的农田快速平整系统设计与试验
农田快速平整 全球导航卫星系统 基准面设计
2016/12/28
针对当前全球导航卫星系统（GNSS）农田土地平整过程中，操作复杂，地形测量费时费力的问题，设计了基于GNSS的农田快速平整系统。该系统可实现快速农田基准设计，农田水平平整，农田坡面平整等功能。农田坡度设计算法在前期系统算法基础上进行了优化，提出适用于快速平整系统的坡面平整算法，坡面平整后可以达到灌溉时水流速度快、水量覆盖均匀，减少挖填土方量、提高平整速度的目的。平整试验结果表明，水平面平整后最大高...
为解决实际农田环境中农业机械自动导航系统的位姿信息易受跟踪卫星数动态变化、天线遮挡、数据传输错误等因素影响，造成定位精度和稳定性变差的问题，采用全球导航卫星系统（GNSS）、微机械惯性测量单元（MIMU）及航位推算（DR）相融合的组合导航定位系统，建立了农业机械两轮运动学定位模型，针对系统状态噪声不稳定的因素，提出了一种根据当前估计值与预测值的偏差自适应地调节系统状态协方差阵的扩展卡尔曼滤波算法，...
ON THE EVALUATION OF GNSS COMPLEMENTARY BY USING QUASIZENITH SATELLITE OF JAPAN
GNSS QZS GNSS Complementary GNSS Augmentation
2016/7/5
The positional information has an important role in our lifestyle. People need to get positional information by GNSS. The satellite positioning must receive a signal from four or more satellites, howe...