Title :
Accurate two-dimension spectrum of the GEO SAR echo based on a modified range model at apogee
Author :
Dacheng Liu ; Yu Zhu ; Chong Ni ; Zegang Ding ; Cheng Hu
Author_Institution :
Sch. of Comput. Sci. & Technol., Beijing Inst. of Technol., Beijing, China
Abstract :
Because of the large orbital eccentricity, the slant range history of GEO SAR is "near-far-near" at apogee, which is opposite to LEO SAR. This paper presents a modified slant range model with negative curvature to fit the "near-far-near" slant range history for GEO SAR at apogee. Based on the principle of stationary phase (POSP), an accurate two-dimension spectrum is derived from the modified range model. Finally, the modified range model and its two-dimension spectrum are verified by computer simulation.
Keywords :
echo; spectral analysis; synthetic aperture radar; GEO SAR echo; LEO SAR; POSP; apogee; computer simulation; modified range model; near-far-near; negative curvature; orbital eccentricity; principle of stationary phase; slant range history; slant range model; two-dimension spectrum; GEO SAR; Slant Range Model; Two-Dimension Spectrum;
Conference_Titel :
Radar Conference 2013, IET International
Conference_Location :
Xi´an
Electronic_ISBN :
978-1-84919-603-1
DOI :
10.1049/cp.2013.0201
