Indeed, yes, it's astonishing. 5cm, for an object 20'000 km above ground. http://ccar.colorado.edu/asen5050/projects/projects_2008/xiaofanli/ http://ccar.color

Indeed, yes, it's astonishing. 5cm, for an object 20'000 km above ground. http://ccar.colorado.edu/asen5050/projects/projects_2008/xiaofanli/ http://ccar.colorado.edu/asen5050/projects/projects_2008/xia... The satellite position and clock correction are similar in scale as shown in figure 1 and 3. However, as described in previous sections, the accuracy of the satellite position calculated from broadcast ephemeris is about 160 cm and 5cm for the precise ephemeris.