High Resolution 1:10,000 scale Mapping Strategy of Multi ... - NDMA

Figure App 20.7: Imaging procedure
For each scan line,a separate bundle of light rays is defined,
Where Pk = image point
xk = x value of image coordinates for scan line,
k f = focal length of the camera
Ok = perspective center for scan line k, aligned along the orbit
PPk = principal point for scan line k
lk = light rays for scan line, bundled at perspective center Ok
Exterior orientation in satellite imagery
Satellite geometry is stable, and the sensor parameters, such as focal length,
are well-known. However, the triangulation of scenes is somewhat unstable because
of the narrow, almost parallel bundles of light rays. Ephemeris data for the orbit are
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