Generalized Pseud-range Equation for SAR Platform Positioning Under the 6-D INS Error Model

Abstract

During flight, aircrafts often rely on satellites to provide navigation and positioning information, which fail in many scenarios. As an alternative, meanwhile, airborne inertial navigation system (INS) usually works with a large error. Another effective platform positioning method is to accurately locate targets in the real-time high-quality ground image provided by airborne SAR and then reverse-compute the position of the carrier, that is, the scene matching navigation methods. Since the targets in the SAR image has been located accurately during our previous studies, we focus on the reverse-computation process then. In this paper, a method based on generalized pseud-range positioning is proposed, and the generalized pseud-range equation is improved under the 6-D INS error model to improve the positioning accuracy.

KEYWORDS:

• Positioning method
• Synthetic aperture radar
• Pseud-range equation Error model

Additional information

Notes on contributors

Zhaoyou Huang

Zhaoyou Huang received the BS degree in Marine Technology from the Ocean University of China, Qingdao, China, in 2018. Currently, he is working toward the MS degree with information engineering, Nanjing Research Institute of Electronics and Technology, Nanjing, China. His research interest is in the field of SAR image processing. Email: [email protected]

Kuiying Yin

Kuiying Yin received the BSc and PhD degrees in electrical engineering from Xidian University, Xi’an, China, in 1999 and 2011, respectively. Currently, she is an engineer with the signal processing, Nanjing Research Institute of Electronics Technology. Her research interests include image processing, SAR ATR. She has published over 50 research papers in these fields. Corresponding author. Email: [email protected]