Results 21 to 30 of about 123,753 (301)
Fire, 2022 In the past decades, important research has been carried out to map the natural disturbances in the Paraná River Delta. The benefits of the combined use optical and radar data are also known. The main objective of this paper is to assess the wetland fire
Héctor Del Valle +2 more
doaj +1 more source
Inverse synthetic aperture ladar imaging algorithm for space spinning targets
The Journal of Engineering, 2019 Due to the limitation of laser modulation technology, the azimuth Doppler ambiguity problem exists in the process of inverse synthetic aperture ladar (ISAL) imaging for spinning targets. The traditional azimuth imaging method will not be used to obtain a
Yakun Lv +4 more
doaj +1 more source
Time-Delay Multiplexing of Two Beams in a Terahertz Imaging Radar [PDF]
, 2010 We demonstrate a time-delay multiplexing technique that doubles the frame rate of a 660–690-GHz imaging radar with minimal additional instrument complexity.
Bryllert, Tomas +5 more
core +1 more source
The Journal of Engineering, 2019 Aircraft wake vortex is a sort of turbulence generated by a flying aircraft. It has attracted much attention in aviation safety area because it may cause a following aircraft to roll out of control.
Hang Gao +3 more
doaj +1 more source
Remote Sensing, 2021 Water stock monitoring is a major issue for society on a local and global scale. Sentinel-1&2 satellites provide frequent acquisitions to track water surface dynamics, proxy variables to enable water surface volume monitoring.
Santiago Peña-Luque +5 more
doaj +1 more source
Waveform considerations in space-variant optical processors [PDF]
, 1978 The use of coded waveforms in space-variant optical signal processors using coordinate transformations is considered. It is shown that nonlinear transmitted coded signals must be used with such a processor and that this results in novel waveform design ...
Casasent, David, Psaltis, Demetri
core +1 more source
The Journal of Engineering, 2019 Light detection and ranging (LIDAR) has facilitated extraordinary advances in various areas such as remote-sensing, topography, atmospheric/ecological environment studies etc.
Chi Xu +3 more
doaj +1 more source
Estimation of Apollo lunar dust transport using optical extinction measurements [PDF]
, 2015 A technique to estimate mass erosion rate of surface soil during landing of the Apollo Lunar Module (LM) and total mass ejected due to the rocket plume interaction is proposed and tested.
Lane, John E., Metzger, Philip T.
core +3 more sources
The Journal of Engineering, 2019 It is well known in the meteorological community that millimetre-wavelength cloud radars contain considerable contamination from aerial biota, and much of this comprises small weakly flying insects.
Charlotte E. Wainwright +3 more
doaj +1 more source
Performance Analysis of Sensor Systems for Space Situational Awareness [PDF]
Journal of Astronomy and Space Sciences, 2017 With increased human activity in space, the risk of re-entry and collision between space objects is constantly increasing. Hence, the need for space situational awareness (SSA) programs has been acknowledged by many experienced space agencies.
Eun-Jung Choi +8 more
doaj +1 more source