基于分区矢量相加的BDS选星优化方法  

Satellite selection method of BDS based on partition vector summation

作　　者：丁安民[1] 魏金本 李克昭[1,2] 赵磊杰 

机构地区：[1]河南理工大学测绘与国土信息工程学院,河南焦作454000 [2]北斗导航应用技术协同创新中心,河南郑州450052

出　　处：《河南理工大学学报（自然科学版）》2017年第3期54-59,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41202245;41272373);河南理工大学骨干教师科研计划项目(72105/090)

摘　　要：为选择恰当的可视星,在矢量求和与最大多面体体积选星算法的基础上,提出了基于分区矢量相加的选星优化方法。该方法根据可见星在站心坐标系的高度角和方位角大小,将其划分为顶座区域和若干个底座区域;在各个底座区域选取底座星,并求解其矢量和,选取矢量和最小的三组底座卫星;对三组底座星和顶座区域的顶座星进行优化组合,选取GDOP值最小的一组作为定位解算卫星。仿真计算结果表明,此选星优化方法,在保证较高精度的导航定位要求下,能够实现快速选星。Based on the algorithm of vector sum and maximum polyhedron volume satellite selection algorithm, a satellite selection method based on partition vector sum is proposed. The method is as follows： （1） according to the elevation angle and azimuth angle in earth-fixed coordinate system,the visible satellite area is divided in-to the top area and some base areas; （2 ） the base satellites are selected in base area,and the selected satellitesVector sums are computed, then the three sets of base satellites responding to the minimum sums are selected; （ 3 ） combining the base satellites with the top satellite from the top area, the satellite set, which has the minimum GD0P,is chosen. And the satellites of the set are taken as the positioning calculation satellites. The simulation results show that the proposed method can achieve fast satellite selection in the navigation and positioning with high accuracy.

关 键 词：BDS GD0P 选星 矢量相加 

分 类 号：P208[天文地球—地图制图学与地理信息工程]