## Tracking Systems: Their Mathematical Models and Their ErrorsNational Aeronautics and Space Administration, 1966 - Space trajectories |

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amount of tracking Apollo Argument of perigee azimuth bias errors Body Impact Parameters central force field column matrix combination components conic section Continuing the listing cosyscos covariance matrix defined discrete points earth eccentric anomaly Equation B-6 error analysis error ellipsoid error equations errors in spacecraft evaluated Figure fundamental plane given Greenwich sidereal hyperbola impact plane inertial coordinate system injection into orbit least squares estimator least squares sense linear listing of matrices Mathematical Models matrix Equation matrix in terms measurement bias measurement noise number of measurements partial derivatives patched conic trajectory penetration point position and velocity precision trajectory priori knowledge range and range range rate system Reference referenced region of dominance Right ascension RMS errors s s s satellite orbit solved spacecraft position Systems Measuring targeting point tracking data tracking systems transition matrix true anomaly unit vector Variance-Covariance Matrix velocity errors velocity vectors Vonbun weighted least squares