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How HRSC's five panchromatic channels view Phobos

How HRSC's five panchromatic channels view Phobos
How HRSC's five panchromatic channels view Phobos Mars Express' HRSC has five "panchromatic" detectors that each look down from the spacecraft at a different angle: there is one nadir (straight-down) channel, two "stereo" channels S1 and S2 that are each angled forward and backward along the spacecraft's path at 18.9°, and two "photometric" channels P1 and P2 that are at slightly smaller angles. As a result of these different look angles, Mars Express saw Phobos from five different perspectives. ESA / DLR / FU Berlin (G. Neukum)