手持GM-101 GPS定位精度研究

针对接收机型中的(穿越GM-101)手持机,在绝对定位模式下系统地探讨手持式GPS定位的稳定性,合适的定位观测时间,观测值中所含误差的性质。通过与全站仪(南方ET)对比研究发现手持式GPS定位中系统误差占居主导地位,认为改正系统误差是提高手持式GPS定位精度的重要途径。此外,还对手持式GPS同步和异步距离测量方法进行了对比研究。

Study on the Location Precision of PDA GPS

GPS navigate had many advantages in real-time,automatic,all-weather, high precision,high efficiency,multi-functional,easy and simple.In recent years it was widely used in the survey and draw of forestry high grading highway. Its precision was generall]y in 5～10?m and the SA(Selective Availability) policy was implemented by U.S.government,which made the precision of most single unit being at the level of 100?m.And this precision was far from solving the orientation problem of forest zone under most conditions.The positioning precision of holding GPS still lacked systematic research in practice.It is significant to develop the hold formula GPS in precision and so on.The stability of GPS, especially for receive model and orienting mode was probed into in the determination of the suitable localization,observation time and properties of error included in observed value.Compared with stand appearance(southern ET),in GPS's position,the systematic error that occupied to be absolutely leading status was discovered and it was an important to improve the positioning precision of holding type GPS to correct the systematic error.