A Study on the Feasibility of Stop-and-Go Approximation in FMCW SAR

Synthetic aperture radar (SAR) specializes in capturing two-dimensional images of Earth’s surface. Because satellites or aircraft have mainly been used as SAR platforms, pulse systems with high peak transmitted power preferred for long-range detection. However, because based on are generally too heavy and expensive, lightweight low-cost frequency-modulated continuous-wave (FMCW) attracted increasing interest, many studies FMCW signal processing being conducted. The duration is considerably longer than that radar. Therefore, it necessary to determine whether stop-and-go approximation (SAG) still valid If SAG not applicable, an additional, time-consuming range cell migration correction process required. In this study, the conditions under which can be applied were analyzed. Moreover, Ku-band field tests conducted experimentally validate feasibility SAG. Several quantitative parameter values demonstrating advantages applying identified.