GPS定位按参考点可分为绝对定位和相对定位；按接收机工作时的状态可分为

GPS定位按参考点可分为绝对定位和相对定位；按接收机工作时的状态可分为静态定位和动态定位；按数据解算时间又可分为实时定位和后处理定位等。本课题研究了各类GPS定位方法，并介绍了当今流行的几种动态实时差分定位技术，如局域差分定位技术、广域差分定位技术以及用于海上定位的信标定位技术等。GPS获取到的是WGS84坐标系下的坐标，通过七参数或四参数可转换至当地坐标系坐标。数字化测深仪以每秒几十次的频率对河底发射超声波，通过测定发射和接收的时间差来测定水深值。将GPS和测深仪安装在一只船上，便可同时采集位置和水深数据，再由一台计算机对采集到的数据进行实时处理输出，就构成了水下地形测量系统。由于工作环境和工作方式，水下地形测量会产生各种误差。本课题主要研究了粗差剔除、偏心改正、时间延迟改正、水位改正、动态吃水改正等误差改正和数据处理方法。

結果 (英文) 1:

GPS positioning according to the points of reference can be divided into absolute and relative positioning; according to the State of receivers to work can be divided into static and dynamic positioning; solution time can be divided into real-time location data and post-processing positioning. The research of GPS positioning method, and introduces several of today's popular dynamic real time DGPS technology, such as local area, wide area differential positioning technique of DGPS technology positioning beacon location technology as well as for the sea. GPS is WGS84 coordinates to obtain the coordinates of a by seven or four parameter can be converted to the local coordinate system coordinates.Digital depth finder in dozens of times per second the frequency on the river bottom emitting ultrasound, by measuring the time difference to the depth values of the transmitting and receiving. Install a GPS and depth finder on a boat, can collect location and water depth data by computer for real-time processing of collected data output constitutes the underwater topographic survey system. Due to the work environment and working methods, underwater topographic measurement can cause all sorts of errors. This paper mainly studies the gross error elimination, eccentricity correction, delay, level correction, dynamic draught to correct error correction and data processing.

結果 (英文) 2:

GPS positioning can be divided by the absolute reference point and relative positioning; according to the state of the receiver at work can be divided into static and Dynamic Positioning; press solver time data can be divided into real-time positioning and post-processing positioning. The research of the various types of GPS positioning method, and describes some of today's popular dynamic real-time differential positioning technologies, such as local area differential positioning technology, wide area differential positioning beacon positioning technology and techniques for offshore positioning and so on. GPS coordinates to get to the WGS84 coordinate system, through seven parameters or four parameters can be converted to the local coordinate system of coordinates. Second digital sounder with dozens of river transmitting ultrasonic frequency, by measuring the time difference between transmission and reception to determine the depth value. The GPS and sounder mounted on a boat, you can simultaneously capture the location and depth of the data, and then collected by a computer to perform real-time data processing output, constitutes the underwater topography measurement system. As the working environment and working methods, underwater topographic survey will produce a variety of errors. This paper studies the error exclusion, eccentric correction, time delay correction, the water level corrections, error correction and other dynamic draft correction and data processing methods.

結果 (英文) 3:

According to GPS positioning reference points can be divided into absolute and relative positioning receiver; according to the working state can be divided into static positioning and dynamic positioning; according to the data calculation time can be divided into real-time positioning and processing positioning. The research of GPS positioning method, and introduces several popular real-time differential positioning technology, such as local area differential positioning technology, differential positioning technology as well as for the offshore location beacon positioning technology. GPS access to the coordinates WGS84 coordinates, by seven or four parameters can be transformed to the local coordinate system.Digital sounder at a frequency of dozens of second bottom emitting ultrasonic transmitting and receiving, by measuring the time difference to measure water depth value. GPS and sounder mounted on a boat, they can collect the position and depth of data by a computer, and then on to collect real-time data processing output, constitutes the underwater topography measurement system. Because the work environment and work style, the underwater topographic survey will produce a variety of errors. This paper mainly studies the detection of outliers, eccentricity correction, time delay correction, correction of water level, dynamic draft correction error correction and data processing method.