A device and method for four-point calibration of a microwave radiometer
A microwave radiometer and four-point calibration technology, which is applied to measuring devices, instruments, and measuring electrical variables, etc., can solve problems such as large calibration errors, achieve small requirements for the use environment, improve calibration accuracy, and improve measurement efficiency and The effect of calibration efficiency
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[0038] A device and method for four-point calibration of a microwave radiometer according to the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0039]A device for four-point calibration of a microwave radiometer of the present invention comprises: a rotary table, an external calibration heat source, an external calibration cold source and an internal calibration unit; the rotary table rotates along a vertical plane, The external heat source and the external cold source are fixed in two directions at the center of the rotary table, and are respectively used to provide external calibration high temperature calibration points and external calibration low temperature calibration points, and the microwave radiometer is fixed on the rotary table and rotate synchronously with the turntable, while making the antenna of the microwave radiometer point to the center of the turntable at all times; the internal calibratio...
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