Abstract: In traditional speed-measuring method correction method for measured data from radar onboard space tracking, telemetering and command (TTC) ship, the effects of ship waggling, heaving and lateral movement on speed of antenna are ignored. In the traditional method, only the course data and the ship speed data are used to calculate the speed of radar antenna relative to the earth. By analyzing the derivation process of the traditional method, it is found that some systematic errors are ignored, which are found in simplified formula. A speed-measuring correction method is established to eliminate these systematic errors. The proposed method contains two sub-models: inertia navigation platform speed model based on GPS velocity determination, and object speed correction model. The data accuracy and orbit determination are tested in checking flight, near-earth orbit task and far-earth orbit task. The result shows that the proposed speed correction method is superior to the traditional method in the aspect of eliminating random error. Key

Key words: informationprocessingtechnology, shipspeedcorrection, GPS, inertianavigationplatform, flightcheckdata, TTCship