Study on detection sensitivity of missile-borne star tracker

The electronic number of star point light spot (called star point in short) target center pixel was obtained by APS image sensor response to stellar radiation. The energy concentration degree of star point target center pixel was derived by star point energy distribution under static condition and dynamic condition respectively. The noise sources of APS image sensor were analyzed one by one. With signal to noise ratio (SNR) criterion of star point target detection, the static detection sensitivity model and dynamic detection sensitivity model were established. Thus a more detailed description of detection sensitivity was given.