| Pico&nano-satellites is a small satellites with a kilogram mass level and based on MEMS technology.pico&nano-satellites are widely used in scientific research,technical experiments,commercial remote sensing and other fields by forming constellations,formations or groups of satellites to accomplish tasks that are difficult to achieve by a single large satellite.ln order to accurately locate the Pico&nano-satellite,it is necessary to use the technology of non-cooperative target to carry out laser ranging if the pico&nano-satellites becomes space debris after the completion of in-orbit service.According to the current laser detection capability of non-cooperative targets in space,due to the small size of the pico&nano-satellites,the return laser signal is weak,so it is difficult to detect it.Therefore,the laser ranging cooperative target suitable for pico&nano-satellite is designed,so that the high precision characteristic of laser ranging technology can be applied to the target monitoring of pico&nano-satellite.It has important practical value for high precision measurement of space target and precise monitoring and early warning of debris target.This paper focuses on the goal of developing laser reflector suitable for pico&nano-satellites,which is based on the practical requirement of high difficulty laser ranging for low orbit pico&nano-satellites,and is designed with light quality and flexible distribution.The micro-laser reflectors which can be observed in orbit and after becoming space debris can be observed by conventional satellite laser ranging technology.the specific contents are as following:(1)Calculation and analysis of the aberration and its compensation method,effective field of view angle,effective reflector area,observable time,centroid error correction distribution and other core technical parameters of spaceborne laser ranging cooperation target.ln order to provide the basis for the design of laser retro-reflector for pico&nano-satellite,The analysis of laser reflector with pyramid structure and octagonal structure in Leo satellite is given as an example.(2)Pico&nano-satellites are typically running on 250 to 1000 km orbit and belong to low orbit satellites.A micro laser reflector with a mass of not more than 150g,a field of view angle of 360°,a ranging accuracy of centimeter level and sufficient echo intensity is designed for the cube satellite.And cuboid and polyhedron structure Pico&nano-satellite laser reflector is designed(3)A backrest is designed for the processing technology of corner prism?corner cube prisms can be into a set in the process of grinding,lapping and rough polishing by rigidity millstone and tipping back backrest,fine polishing by separators is in the final step.This process can realize high precision prism,beam parallelism deviation for 1",for mass serial production,and this technology reduce machining procedure,quick operation cycle,high efficiency and the accuracy can be guaranteed.(4)In order to ensure that the satellite laser reflector can work normally in the space environment after successful launch,taking the low-orbit satellite laser reflector as an example.To introduced the optical and mechanical properties and Thermal properties and space irradiation performance tests.of the laser reflector on the ground. |
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