求翻译：GPS在现实生活中应用很广泛，现在的GPS大多应用在．跟踪定位，轨迹回放，报警（报告），里程统计，短信通知功能，车辆远程控制，油耗检测和车辆调度中。GPS的空间部分是由24颗卫星组成(21颗工作卫星，3颗备用卫星），它位于距地表20200km的上空,均匀分布在6 个轨道面上(每个轨道面4 颗) ,轨道倾角为55°。是什么意思？

GPS application in real life is very wide, now most of the GPS application. Tracking, track playback, alarm (report), mileage statistics, SMS notifications, remote control vehicles, fuel consumption test, and vehicle scheduling. GPS space segment consisting of 24 satellites (21 operating satellites, 3 spare satellites), it is in distance over the surface of 20200km, on evenly distributed in 6 orbital planes (per track 4), rail inclination angle is 55 degrees.