L.-M. Hu's scientific contributions
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Publications (2)
We discuss the dynamical method for recovering the gravity field model based on the dynamical orbits and accelerometer data of CHAMP and derive the mathematical algorithm to solve the accelerometer scale and bias, the satellite' s initial state vector and the model coefficients simultaneously. The gravity field model TJCHAMPOIS has been recovered w...
The application of GPS is often needed to transform coordinates. If the transformation parameters are solved with the GPS data in a small area, the precision of transformation parameters may be very poor, especially the translation parameters. The reason is that the translation parameters and rotation parameters are high correlated in this case, wh...
Citations
... From the aspect of algorithm precision optimization, the main focus is on the solution method of the rigid body transformation matrix. The traditional method of 3D coordinate transformation is least squares (LS) [16]. Moreover, the methods of total least squares (TLS) [17,18], weighted total least squares (WTLS) [19][20][21], and robust weight total least squares (RWTLS) [22,23] have been proposed to solve problems such as the coefficient matrix, gross error, and more. ...