Dual-chord width earth simulator

Abstract

The invention discloses a dual-chord width earth simulator. A first earth simulator consists of a first cold plate, a second cold plate and a first hot plate. A second earth simulator consists of a third cold plate, a fourth cold plate and a second hot plate. The first hot plate is a semicircular sheet embedded into a pedestal, and has an upward opening. A motor driving mechanism passes through the central point of the semicircle of the first hot plate to serve as a main shaft of the first earth simulator, and can control the rotation of the first and second cold plates to shade the outer surface of the semicircle of the first hot plate respectively. The second hot plate is semi-cylindrical and embedded into the pedestal, and has the upward opening. A driving shaft of the motor driving mechanism is overlapped with the axis of the semi-cylinder. The motor driving mechanism can control the rotation of the third and fourth cold plates to shade the inner surface of the semi-cylinder of the second hot plate to simulate variations of the chord width of the earth respectively. The dual-chord width earth simulator can meet the scanning requirements of a biconical earth sensor, and simultaneously provides a measurement target for two paths of infrared channels.

Description

technical field [0001] The invention belongs to the field of aerospace measurement and relates to an earth simulator. Background technique [0002] In the development process of satellite control system, semi-physical simulation is an indispensable link. Since the sensor needs to refer to a certain target to work, the earth simulator is used as the target simulator of the earth sensor. Its function is to simulate the earth seen by satellites in space on the ground, and simulate the radiation characteristics of the earth, that is, the radiance between the earth and space. Difference. [0003] The existing earth simulators developed at home and abroad only simulate the normal working conditions of geosynchronous satellites. Generally, the method of collimating light pipes is used to directly simulate the disc characteristics of the horizon circle. However, low-orbit satellites observe the large viewing angle of the earth and directly simulate the disc characteristics of the ...

AI Technical Summary

Problems solved by technology

However, the earth simulator can only simulate one earth chord width. For the dual-cone scanning earth sensor, the earth simulator cannot provide two measurement targets at the same time, so it cannot meet the sensor test requirements

On the other hand, the chord width of this earth simulator is fixed, which cannot meet the requirement of variable chord width

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