TY - JOUR
T1 - 地理坐标系下GPS定位误差的定量研究
AU - Guo, Yan Bing
AU - Miao, Ling Juan
AU - Li, Chuan Jun
AU - Zhang, Xi
N1 - Publisher Copyright:
© 2020, Editorial Department of Transaction of Beijing Institute of Technology. All right reserved.
PY - 2020/4/1
Y1 - 2020/4/1
N2 - The current quantitative analysis of GPS position errors using pseudoranges is still not accurate enough. Therefore, in this paper, GPS position errors in an east-north-up local topocentric coordinate system were further analysed in two scenarios. Firstly, using all visible satellites for positioning, the expressions of GPS position errors were modified by setting corresponding parameters for different latitudes. Secondly, four optimum satellites were selected for positioning, the expressions for GPS position errors were first derived for a more practical situation. On this basis, the interrelationships between various position errors were established for the above two scenarios, respectively. It was designed that, if the standard deviation of a user's pseudorange error σURE was known, the standard deviations of GPS position errors could be estimated more accurately according to the proposed formulas. The accuracy of the proposed formulas was verified using a SPIRENT satellite signal simulator, generating realistic satellite signals at the equator, 45° north latitude and the north pole respectively.
AB - The current quantitative analysis of GPS position errors using pseudoranges is still not accurate enough. Therefore, in this paper, GPS position errors in an east-north-up local topocentric coordinate system were further analysed in two scenarios. Firstly, using all visible satellites for positioning, the expressions of GPS position errors were modified by setting corresponding parameters for different latitudes. Secondly, four optimum satellites were selected for positioning, the expressions for GPS position errors were first derived for a more practical situation. On this basis, the interrelationships between various position errors were established for the above two scenarios, respectively. It was designed that, if the standard deviation of a user's pseudorange error σURE was known, the standard deviations of GPS position errors could be estimated more accurately according to the proposed formulas. The accuracy of the proposed formulas was verified using a SPIRENT satellite signal simulator, generating realistic satellite signals at the equator, 45° north latitude and the north pole respectively.
KW - All visible satellites
KW - Expressions for GPS position errors
KW - Four optimum satellites
KW - GPS position errors using pseudoranges
KW - Standard deviations of GPS position errors
UR - http://www.scopus.com/inward/record.url?scp=85084853720&partnerID=8YFLogxK
U2 - 10.15918/j.tbit1001-0645.2019.105
DO - 10.15918/j.tbit1001-0645.2019.105
M3 - 文章
AN - SCOPUS:85084853720
SN - 1001-0645
VL - 40
SP - 416
EP - 420
JO - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
JF - Beijing Ligong Daxue Xuebao/Transaction of Beijing Institute of Technology
IS - 4
ER -