【摘要】 日本的QZSS刚完成第一阶段四颗卫星的部署。利用自主研发的"高精一号"多模多频接收机对QZSS卫星的L1C/A、L1-SAIF、L2C和L5信号特性、系统可见性以及定位服务性能进行研究。通过对监测结果的分析与对比,在中国区域观测到QZSS四颗卫星,其中三颗QZO轨道卫星的星下点轨迹重合呈不对称"8"字形;使用QZSS卫星协同配合GPS系统可以有效减少定位误差,提高GNSS接收机定位成功率和定位精度,相较于GPS L5信号单独定位,在北京地区,截止仰角为10°和20°时,成功率分别提升52%、68%。更多还原

【Abstract】 The Japan’s QZSS has just completed the deployment of the first phase of four satellites. The QZSS system’s characteristics of L1 C/A, L1-SAIF, L2 C and L5 signals, the system visibility and the location service performance are monitored and analyzed by the data collected with the self-developed "Gaojing No.1" multimode multi-frequency receiver. Through the analysis and comparison of the monitoring results, four stars of QZSS are observed in China, of which three QZO orbit satellites coincide with each other in an asymmetric "8" shape. Using QZSS satellites cooperating with GPS system can effectively reduce the positioning error and improve the GNSS receiver positioning success rate and positioning accuracy. Compared with GPS L5 signal positioning, alone in the Beijing area, when the elevation angles are 10° and 20°, the success rates are increased by 52% and 68%, respectively.更多还原