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When crystal oscillator applied in high dynamic host vehicle, dynamic loads impact its short and medium-term stability. In order to suppression and/or reduction these impacts, gyroscopic mounting is proposed to install oscillator on it.
In high dynamic GNSS receivers, replica carrier is polluted by dynamic loads which modulated on it and generate clock drift as frequency and phase error. These dynamic loads consist of steady state acceleration, sinusoidal vibration, mechanical and acoustic random vibrations. As steady state load exists all over the trajectory and causes great phase deviation, therefor phase lock is lost and the sensitive...
Forward-Looking Ground Penetrating Synthetic Aperture Radar (FLGPSAR) has the capability of forming two-dimensional high-resolution images of subsurface objects from a standoff distance. This paper addresses the detection of subsurface targets, i.e. landmines, in FLGPSAR images. The conventional Constant False-Alarm Rate (CFAR) algorithm has been widely used in SAR image target detection, but its...
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