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The high precision denotation model of satellite orbit dynamics based on physics parameter model and mathematics model which associates sparse parameter representation with time sequence analysis, nonlinear semi-parametric combined observation model based on system error parameters modeling and non-parametric component denotation of model error, and combined orbit determination (COD) parameterized...
The GPS software receiver's architecture is reviewed. And a classic second order phase lock loop and the loop parameters' configuration are described. Though analyzing the total phase jitter, it is shown that under a realistic weak signal condition, the tracking loop's ability is inhibited by the noise and transient frequency jump. Then an optimal estimation based intelligent integrated tracking loop...
In this technical note we consider the problem of distributed discrete-time state estimation over sensor networks. Given a graph that represents the sensor communications, we derive the optimal estimation algorithm at each sensor. We further provide a closed-form expression for the steady-state error covariance matrices when the communication graph reduces to a directed tree. We then apply the developed...
A new image method of velocity measurement based on the smearing effect is presented. The producing mechanism of the smearing effect is introduced, and the relationship between the trailing smear and the relative movement of the camera and the target is also studied. The kinetic model is built to describe the movement of the camera, target and the image. The pixel size and the scale of the camera,...
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