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Article
Open AccessPrecise positioning of the Chang’E-3 lunar lander using a kinematic statistical method
A kinematic statistical method is proposed to determine the position for Chang’E-3 (CE-3) lunar lander. This method uses both ranging and VLBI measurements to the lander for a continuous arc, combing with prec...
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Article
Open AccessShock wave compression of poled Pb0.99[(Zr0.90Sn0.10)0.96Ti0.04]0.98Nb0.02O3 ceramics: Depoling currents in axial and normal modes
We used a 100-mm diameter gas gun to investigate the output currents due to the sudden depolarization of poled Pb0.99-[(Zr0.90Sn0.10)0.96Ti0.04]0.98Nb0.02O3 ceramics under shock wave compression. We conducted sho...
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Article
Open AccessImprovement of orbit determination for geostationary satellites with VLBI tracking
China’s COMPASS satellite navigation system consists of five or more geostationary (GEO) satellites. The roles of GEO satellites are to improve the regional user’s positioning accuracy and provide the continuo...