Two-way Pseudorange Model and Simulation Comparision
Fuping Sun · Journal of Zhengzhou Institute of Surveying and Mapping · 2007
Mathematic models of the up and down link pseudorange in two-way distance measurement were given in this paper.The differences of geometrical distance,satellite and station clock offset influence,earth rotation correction and other error corrections between up and down link were studied.And their magnitudes were analyzed.Through calculation we educed that there were big difference between up and down link geometrical distance because of transmiting time delay.When we used the two-way pseudorange data by difference,this influence had to be considered.But the differences of other corrections were so small that they could not be taken into account.At last the up and down link pseudoranges of GPS 04 satellite were simulated.Because of the satellite and station clock offset,the difference could reach ten thousand meter.