Store Separation: Photogrammetric Solution for the Static Ejection Test

Figure 17

Geometric parameters of the pinhole camera model. : focal length; PP: main point of collimation, intercept of the optical axis with the plane of the image; CP: perspective center, point where the light beams leave the ground and reach the image; : sensor pixel size; : size of the sensor frame; : frame size of the projected image on the ground; GSD (ground sample distance): pixel size projected on the ground; : size of the object on the ground; : dimension in the image of the object with real dimension ; : projected distance from the CP to the ground, corresponding to the flight height; FOV (field of view): the total aperture angle representing the field of view covered by the sensor; IFOV (instantaneous field of view): the aperture angle representing the field of view of a pixel.