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首页> 外文会议>International technical meeting of the Satellite Division of the Institute of Navigation >The Performance Analysis of a Portable Mobile Mapping System with Different GNSS Processing Strategies
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The Performance Analysis of a Portable Mobile Mapping System with Different GNSS Processing Strategies

机译：具有不同GNSS处理策略的便携式移动制图系统的性能分析

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Over the years, land vehicular based Mobile MappingSystems (MMSs) have demonstrated that accuracies suitablefor all but the most demanding cadastral and engineeringapplications can be achieved. This result, combined with areduction in both the time and cost of data collection, madeMMS a very interesting technology potentially able to meetthe demand of spatial information system operators for rapidspatial data acquisition. However, the high costs involved inthe development of such systems limits their growth in themarket, so that land vehicular based MMSs are still mainlyoperated by the companies or institutions that build them. Inaddition, the primary limitation of such land vehicular basedsystems in terms of operation flexibility is the dependence ofthe availability and quality of road networks. Sometimestreets in the metropolitan area are too narrow for landvehicle to operate. To allow a wider community of spatialdata user to benefit of mobile mapping applications - inparticular the lower costs and greater efficiency of datacollection, a portable MMS (PMMS), is developed in thisstudy. The proposed PMMS is composed of a tactical gradeInertial Measurement Unit (IMU), dual frequencies GlobalNavigation Satellite System (GNSS) receiver, two digitalcameras, a centralized power supply as well as data storageunit to avoid the use of computer or laptop. Data processingmodules including Position and Orientation System (POS)module, mounting calibration (boresight and lever arm)module and close range photogrammetry module aredeveloped in this study. In addition, different GNSSprocessing strategies applied for proposed PMMS operationincluding conventional differential GNSS with a physicalreference station, differential GNSS with Virtual ReferenceStation (VRS) and Precise Point Positioning (PPP) areinvestigated in terms of their Direct Georeferencing (DG)performance. Preliminary results presented in this study bycomparing DG results of checking points provided by theproposed PMMS from various scenarios with their knowncoordinates depicts the absolute 3D positioning accuracy canreach less than 10 centimeters when the object distance isaround 20 meters.
机译：多年来，基于陆地车辆的移动制图 系统（MMS）已证明准确度合适 除了最苛刻的地籍和工程学之外 可以实现应用程序。这个结果，加上一个 减少了数据收集的时间和成本 MMS是一项非常有趣的技术，有可能满足 空间信息系统运营商对快速发展的需求 空间数据采集。但是，涉及的高昂费用 这种系统的发展限制了它们在 市场，因此基于陆地车辆的MMS仍然主要 由建立它们的公司或机构运营。在 另外，这种陆上交通工具的主要局限性在于 系统在操作灵活性方面的依赖是 道路网络的可用性和质量。某个时候 大都市的街道太狭窄了，无法耕种土地 车辆操作。允许更广泛的空间社区 数据用户将从移动地图应用程序中受益 特别是降低成本和提高数据效率 在此开发了一个便携式MMS（PMMS）系列 学习。提议的PMMS由战术等级组成 惯性测量单元（IMU），双频全局 导航卫星系统（GNSS）接收器，两个数字 摄像头，集中式电源以及数据存储 避免使用计算机或笔记本电脑。数据处理 模块，包括位置和方向系统（POS） 模块，安装校准（视轴和杠杆臂） 模块和近距离摄影测量模块是 在这项研究中开发。此外，不同的GNSS 适用于建议的PMMS操作的处理策略 包括具有物理功能的常规差分GNSS 参考站，带虚拟参考的差分GNSS 站点（VRS）和精确点定位（PPP） 根据其直接地理配准（DG）进行了调查 表现。这项研究提出的初步结果是 比较DG提供的检查点的DG结果 从各种方案中提出的PMMS及其已知的 坐标描绘了绝对的3D定位精度 当物距为 约20米。

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