Precise measurement reference design method for SAR satellite

Abstract

The invention provides a precise measurement reference design method for an SAR satellite, and the method comprises the following steps: 1, respectively setting reference blocks in regions of the external surfaces of four end parts of an antenna frame, setting a prism installation boss on the frame, controlling the levelness of the reference blocks and the levelness of the boss and the reference blocks in a mode of combined machining; 2, leveling the antenna frame, enabling a main reference prism of the satellite to be installed on the boss of the antenna frame through the reference blocks at four end parts of the antenna frame and the tool conversion, and controlling the levelness of the main reference prism and the reference blocks. The method can achieve the high consistency of the coordinate system of the main reference prism with the coordinate system of a load antenna, directly eliminates the installation deviation between the main reference prism and the load antenna. A single-chip computer with other precision on the satellite and the precision of the load antenna, relative to the on-orbit to-be-reached target precision of the whole satellite, achieve the unification, thereby reducing the transmission links of precision errors, and improving the precision measurement efficiency of the whole satellite.

Description

technical field [0001] The invention relates to a design method of a radar satellite precision measurement reference, in particular to a design method of a synthetic aperture radar satellite precision measurement reference. Background technique [0002] The accuracy of the payload antenna is the key to ensure the quality of high-resolution satellite in-orbit imaging, and the accuracy of the payload antenna is guaranteed by the installation accuracy of the entire satellite structure assembly stage. Require. In the fine measurement work of the whole satellite, a fine measurement prism is generally set at a relatively fixed position on the satellite as the main reference of the whole satellite assembly fine measurement. The load is accurately measured and adjusted relative to it, so as to achieve the installation accuracy and meet the requirements of the satellite attitude and orbit control subsystem. During the integration and testing process of the payload antenna of the hi...

AI Technical Summary

Problems solved by technology

[0003] At present, the accuracy reference of general satellites is set on the precision measuring ring or the load-bearing cylinder of the satellite, but it is not found that the satellite precision measurement reference is set on the frame of the synthetic aperture radar payload antenna, and the height of the coordinate system of the payload antenna is consistent with the main reference Related reports or methods to ensure that the deviation between the satellite's main reference and the payload antenna is eliminated

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