Open AccessResolution calculation and analysis in high‐resolution spaceborne SAR
Author(s) -
Guo Ping,
Zhang Linrang,
Tang Shiyang
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.1005
Subject(s) - synthetic aperture radar , resolution (logic) , range (aeronautics) , orbit (dynamics) , computer science , range of a projectile , inverse synthetic aperture radar , remote sensing , image resolution , radar , radar imaging , algorithm , computer vision , geology , physics , artificial intelligence , telecommunications , aerospace engineering , engineering , projectile , quantum mechanics
In high‐resolution spaceborne synthetic aperture radar (SAR), the hyperbolic range equation assumption fails to precisely describe the range history; thus, the traditional resolution analysis used for a spaceborne SAR design is imprecise. A curved orbit geometrical model based on the modified equivalent squint range model is graphically presented by vector notation. According to the model, the vectorial calculation of resolution is analytically presented, based on the gradient method. Additionally, a physical model is introduced to derive the effective integration time, which is quite difficult to derive due to the three‐dimensional curved orbit. Simulation results are presented to validate the proposed method.