Method and Implementation of Improving the Pointing Accuracy of an Optical Remote Sensor Using a Star Sensor

Received: 1 March 2019 Accepted: 19 June 2019 Based on the analysis of the pointing accuracy of the optical sensor in a star sensor, this paper introduces the geometric accuracy of the star sensor as an external orientation element that affects the optical remote sensing image and analyzes the characteristics of the installation method of the star sensor in different optical remote sensors. The key factors affecting the pointing accuracy of the star sensor are considered, and the geometrical accuracy of the image is improved by analyzing the installation method of the star sensor, the star sensor bracket design, and the star sensor thermal control component. Achievable measures are made, and the pointing stability of the star sensor is verified through a ground test and by measuring the temperature fluctuations of the orbiting sensor. Through ground testing and on-orbit testing, the star sensor bracket has a temperature fluctuation of <1 °C in one photography cycle, and the star sensor's attitude error around the axis is less than 5", so the uncontrolled geometric positioning accuracy of the image product can be obtained as 11.4 m (rms).

[1]  Qian Hua-Ming,et al.  Design and Verification of Star-Map Simulation Software Based on CCD Star Tracker , 2015, 2015 8th International Conference on Intelligent Computation Technology and Automation (ICICTA).

[2]  Peng Zhang,et al.  A Brightness-Referenced Star Identification Algorithm for APS Star Trackers , 2014, Sensors.

[3]  Carl Christian Liebe,et al.  Accuracy performance of star trackers - a tutorial , 2002 .

[4]  T. Lachenmeier,et al.  Sub-arcsecond performance of the ST5000 star tracker on a balloon-borne platform , 2012, 2012 IEEE Aerospace Conference.

[5]  Jacob W. M. Baars,et al.  Evaluation of the ALMA Prototype Antennas , 2006 .

[6]  朱海龙 Zhu Hai-long,et al.  Research status and development tendency of star tracker technique , 2016 .

[7]  Chen Zhu.  Block-Adjust and Analysis with GeoEye-1 Imagery , 2011 .

[8]  Liu Yi,et al.  Star-sensor measurement model and its application to the spacecraft attitude determination system , 2003 .

[9]  Sebastian Colditz,et al.  Deutsches SOFIA Institut (DSI) at the SOFIA Science Center: engineering and scientific contributions to the airborne observatory , 2016, Optical Engineering + Applications.

[10]  Kazumori Hama,et al.  Optical testing of star sensor (I): Defocus spot measuring technique for ground-based test , 2008 .

[11]  Morris M. Birnbaum,et al.  SPACECRAFT ATTITUDE CONTROL USING STAR FIELD TRACKERS , 1996 .

[12]  Shuang Wang,et al.  Large field and high precision optical system for star tracker , 2014, 2014 IEEE International Conference on Information and Automation (ICIA).

[13]  杨洪波 Yang Hong-bo,et al.  Optimization design and test for bracket of star sensor in micro-satellite , 2016 .

[14]  Nobuharu Ukita,et al.  Optical Seeing Measurements with an Optical Telescope on a Radio Antenna , 2008 .

[15]  Si-yu Lu,et al.  Thermal/Optical analysis of optical system of star tracker , 2011, Photoelectronic Detection and Imaging.

[16]  Yang Dong.  System Design and Analysis for Improving Geometric Accuracy of High-Resolution Optical Remote Sensing Satellite Image , 2013 .