On-satellite calibration plate, preparation method thereof and on-satellite calibration device

The invention discloses an on-satellite calibration plate, a preparation method thereof and an on-satellite calibration device, and belongs to the technical field of space remote sensing, and the on-satellite calibration plate comprises a substrate, and a growth substrate, an attenuation layer and a protection layer which are sequentially located on the light incident side of the substrate; the attenuation layer comprises a doping layer and a separation layer which are stacked, and the doping layer is in contact with the growth substrate; the doped layer comprises a first material and a second material, and the transmittance difference between the first material and the second material is at least 10%. According to the satellite calibration plate, the technical problem that micropores of a perforated plate as an on-satellite calibration plate are easily blocked and are difficult to store is solved, and the protective layer can resist erosion of cosmic particles and ultraviolet radiation in an on-satellite cal