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an electronic camera bracket, is that the earth location of each photograph may be subject to errors associated with the vibration produced from the movement of the rotation stage of the bracket. Since it is difficult to predict the amplitude and damping of vibration the motor rotation stage might induce in a near zero gravity environment, the impact of residual vibration on nominal operations is unknown. Near zero gravity tests aboard the KC-135 will provide insight into the effects of vibration on the accuracy of earth observation photographs.

2.0 Test Objectives

The goal of this experiment is to conduct a series of tests that will ascertain 1) if the motorized rotation stage induces significant vibration that affects the location of earth observation images in a reduced gravity environment and 2) if any such vibration might be reduced or eliminated by suitable modifications to the electronic camera bracket.
Data from two accelerometers will be collected and plotted as a function of time to determine the optimal speed of rotation of the electronic bracket. The interval at which photos can be taken within acceptable latitude and longitude errors as a function of vibration will also be determined.

3.0 Test Description

The camera mount will be affixed to the aluminum mount plate that is mounted to the floor of the KC-135 as per the specified bolt pattern in the JSC Reduced-Gravity User's Guide. The camera mount is a cantilever configuration where the fixed end will be secured to the aluminum mount plate. The free end of the cantilever will support a Kodak DCS Electronic Still Camera.

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