[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.11003/JPNT.2019.8.4.175

EGI Velocity Integration Algorithm for SAR Motion Measurement

Lee, Soojeong (Department of Mechanical & Aerospace Engineering/Automation and Systems Research Institute, Seoul National University)
Park, Woo Jung (Department of Mechanical & Aerospace Engineering/Automation and Systems Research Institute, Seoul National University)
Park, Yong-gonjong (Department of Mechanical & Aerospace Engineering/Automation and Systems Research Institute, Seoul National University)
Park, Chan Gook (Department of Mechanical & Aerospace Engineering/Automation and Systems Research Institute, Seoul National University)
Song, Jong-Hwa (Avionics Radar Team, Hanwha Systems)
Bae, Chang-Sik (Avionics Radar Team, Hanwha Systems)

Publication Information

Journal of Positioning, Navigation, and Timing / v.8, no.4, 2019 , pp. 175-181 More about this Journal

Abstract

This paper suggests a velocity integration algorithm for Synthetic Aperture Radar (SAR) motion measurement to reduce discontinuity of range error. When using position data from Embedded GPS/INS (EGI) to form SAR image, the discontinuity of the data degrades SAR image quality. In this paper, to reduce the discontinuity of EGI position data, EGI velocity integration is suggested which obtains navigation solution by integrating velocity data from EGI. Simulation shows that the method improves SAR image quality by reducing the discontinuity of range error. INS is a similar algorithm to EGI velocity integration in the way that it also obtains navigation solution by integrating velocity measured by IMU. Comparing INS and EGI velocity integration according to grades of IMU and GPS, EGI velocity integration is more suitable for the real system. Through this, EGI velocity integration is suggested, which improves SAR image quality more than existing algorithms.

Keywords

synthetic aperture radar; discontinuity error; velocity integration;

Citations & Related Records

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