title: High-Accuracy Self-Calibration for Smart, Optical Orbiting Payloads Integrated with Attitude and Position Determination.
abstract: A high-accuracy space smart payload integrated with attitude and position (SSPIAP) is a new type of optical remote sensor that can autonomously complete image positioning. Inner orientation parameters (IOPs) are a prerequisite for image position determination of an SSPIAP. The calibration of IOPs significantly influences the precision of image position determination of SSPIAPs. IOPs can be precisely measured and calibrated in a laboratory. However, they may drift to a significant degree because of vibrations during complicated launches and on-orbit functioning. Therefore, laboratory calibration methods are not suitable for on-orbit functioning. We propose an on-orbit self-calibration method for SSPIAPs. Our method is based on an auto-collimating dichroic filter combined with a micro-electro-mechanical system (MEMS) point-source focal plane. A MEMS procedure is used to manufacture a light transceiver focal plane, which integrates with point light sources and a complementary metal oxide semiconductor (CMOS) sensor. A dichroic filter is used to fabricate an auto-collimation light reflection element. The dichroic filter and the MEMS point light sources focal plane are integrated into an SSPIAP so it can perform integrated self-calibration. Experiments show that our method can achieve micrometer-level precision, which is good enough to complete real-time calibration without temporal or spatial limitations.
authors.affiliation: Department of Precision Instrument, Tsinghua University, Beijing 100084, China. jl918@cam.ac.uk.|State Key Laboratory of Precision Measurement Technology and Instruments, Beijing 100084, China. jl918@cam.ac.uk.|Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Beijing 100084, China. jl918@cam.ac.uk.|Photonics and Sensors Group, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, UK. jl918@cam.ac.uk.
authors.forename: Jin
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Precision Instrument, Tsinghua University, Beijing 100084, China. xingfei@mail.tsinghua.edu.cn.|State Key Laboratory of Precision Measurement Technology and Instruments, Beijing 100084, China. xingfei@mail.tsinghua.edu.cn.|Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Beijing 100084, China. xingfei@mail.tsinghua.edu.cn.
authors.forename: Fei
authors.initials: F
authors.lastname: Xing
authors.affiliation: Photonics and Sensors Group, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, UK. dpc31@cam.ac.uk.
authors.forename: Daping
authors.initials: D
authors.lastname: Chu
authors.affiliation: Department of Precision Instrument, Tsinghua University, Beijing 100084, China. liuzl@nim.ac.cn.|State Key Laboratory of Precision Measurement Technology and Instruments, Beijing 100084, China. liuzl@nim.ac.cn.|Collaborative Innovation Center for Micro/Nano Fabrication, Device and System, Beijing 100084, China. liuzl@nim.ac.cn.
authors.forename: Zilong
authors.initials: Z
authors.lastname: Liu
keywords: optical orbiting payload; position determination; self-calibration