https://phys.org/ en-us Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. The Jason-1 satellite obits have been computed using the on-board GPS data and the SHORDE-III procedure. Various orbit validations, including comparison with the Precise Orbit Ephemeris produced by JPL, orbit overlaps, and SLR residuals, indicated that the RMS radial accuracy is in the range of 1-2 cm. https://phys.org/news/2009-02-precise-orbit-jason-satellite-on-board.html Space Exploration Mon, 02 Feb 2009 11:22:34 EST news152796132