A side looking radar has a clutter spectrum dependent on the beam-width of the antenna and the velocity of the platform [3]. Typically the pulse repetition frequency in SAR is set to just adequately sample the Doppler spectrum of the clutter. Fast moving targets can have Doppler signatures ...
The first category of conditioning methods refers to the echoes acquisition, meaning the acquisition of depth, of the across and along-track distance, of the received beam angle, of the numbers of the transmitted and received beam, or of the two-way travel time of the acoustic pulse. The ...
In addition to an infra-red LASER RADAR (LiDAR) 3D sensor array on the back and an infra-red emitter and camera system on the front (behind the screen) for Face ID, the iPhone 14 Pro Max has four separate visible-light color cameras: one on the front (behind the screen) for self...
generated dataset yielded impressive results: over 90% accuracy when dealing with pulses from 15 radars of different types, over 96% accuracy when deinterleaving pulses from 4 radar individuals of a same type and over 90% accuracy when handling 5 radars of different types with 10% ...
Satellite-based synthetic aperture radar (SAR) is a powerful tool for ship detection because it can work in all weather conditions, day and night. However, speckles and heterogeneous regions in SAR images pose great challenges on automatic detection of ships. This paper introduces a bottom-up vis...
image processing ; inverse synthetic aperture radar ; waveforms ; image reconstruction algorithms ; sensing imagery ; reflectance spectra ; spatial resolution ; subpixel ; aerospace imagery ; satellite imagery ; image interpretation ; artificial neural networks ; machine learning ; semantic segmentation ;...
The Simple Rectification to Cartesian Space of Folded Radial Velocities from Doppler Radar Sampling Periodic sampling of the Doppler radar return signal at the pulse repetition frequency causes measured velocities to be ambiguous (folded) when true meteorological velocities along the radial direction exceed...
It has a substantial advantage in enabling the pulse-repetition frequency (PRF) constraints in the SAR system design to be relaxed and also for improving SAR image quality and interpretation. 展开 关键词: Azimuth Image quality Synthetic aperture radar Signal generators Matched filters Filtering ...
You’ll often notice that radar images of asteroids appear to be lighted from directly above or below. The brighter edge indicates theradarpulse is returning from the leading edge of the object, the region closest to the dish. The further down you go in the image, the farther away that pa...
Tesla calls its automated driving system Autopilot. Introduced in 2015, the system included such advanced features as allowing drivers to change lanes by tapping a turn signal and parallel parking on command. To make the system work, Tesla initially installed sonar sensors, radar and a single fron...