Single infrared sensor target orbit determination method based on consistency extended Kalman filtering

The invention provides a single infrared sensor target orbit determination method based on consistency extended Kalman filtering. The method comprises the following steps: firstly, performing equivalent transformation on the angle measurement of an infrared sensor to obtain a new unbiased measurement and noise covariance matrix; further carrying out equivalent transformation on the state equationof the target motion, so that the measurement equation is changed into a linear equation and an equivalent orbit determination model is obtained; providing an orbit determination algorithm based on consistency extended Kalman filtering for the equivalent orbit determination model, estimating a new state variable, and guaranteeing that the orbit determination algorithm has stability and consistency; and giving an orbit determination value of the target position and speed and a real-time evaluation value of an orbit determination error range. The step specifically comprises the following steps of: 1, equivalently conver