文档介绍：起算点与GPS控制网的兼容性分析
【摘要】
GPS定位结果中,随着基准点坐标的不同,所求转换参数会有很大差异。地面网重合点大地坐标中H值(大地高)往往不能精确的给定,中高程异常最高精度为米级,所以会给转换后的坐标带来一定误差。重合点的个数与几何图形结构也会影响转换精度。
在工程测量中通常采用双差模型求解GPS基线,解算时要求知道一个端点的坐标,该坐标的精度对GPS基线的解算结果有影响。已知点的精度越低, 基线的解算精度也越低。在GPS 基线测量中,进行基线解算时,根据已知基线一个端点的坐标,然后根据卫星位置和观测值精确计算出基线向量, 但已知点坐标的精度会影响基线解算结果的精度。所以,为了保证相对定位的精度,起算点状况对精密GPS 基线解算的影响是不能忽略的。
【关键词】GPS;基线;控制点;精度
Abstract :
GPS results, with the benchmark for different,coordinate transformation parameters have significant coincidence point geodetic coordinates of the high value (H) often cannot precisely given, H = H + ζ abnormal height in the highest accuracy for m, so to bring the coordinate transformation after a certain error. The number of coincidence with geometry structure can also affect the accuracy of conversion.
GPS technology is widely applied in engineering survey. Usually , the baselines are found with the doubledifference model . The coordinates of an end point are required to be known in solving the baselines. The precision ofthe known points has impact on the solutions of the baselines. It is found out in stimulation that the lower the precisionof the known points , the lower the precision of the solved baselines. So to guarantee the necessary precision in solvingbaselines , the precise known point is used. Three methods for improving the known points precision are put baseline, using GPS measurement of GPS receiver random software range baseline, need to know the coordinates of an endpoint baseline, then according to the satellite observations and accurately calculate the baseline vector, but known coordinates calculation accuracy will affect the accuracy of the baseline. Therefore, in order to ensure the accuracy of localization, known for precision GPS range baseline influence can not be ignored.
Key words : GPS technology ; baseline ; precision of known point
目录
【摘要】 I
第1章引言 - 1 -
第2章 GPS的应用及其定位原理 - 2 -
GPS应用前景 - 2 -
应用GPS建立控制网的优越性 - 2 -
GPS定位原理 - 2 -