Determination of relative position between two stations using the translocation technique in satellite doppler tracking

The main errors in satellite Doppler positioning are ephemeris errors and refraction errors. For different stations observing the same satellite pass, these errors are correlated. By taking advantage of the correlation, we can increase the positioning accuracy. We have applied this “translocation” technique /5,6/ to 14 passes on 1980 August 23–24 observed at Beijing and Shanghai. Our result on the relative coordinates between these two stations has an internal accuracy of ± 2m, and our result on the baseline length differs from the geodetic result by 1.5m.