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Lidar (/ ˈlaɪdɑːr /, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" [1] or "laser imaging, detection, and ranging" [2]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver.
Laser rangefinder. A long-range laser rangefinder is capable of measuring distance up to 20 km; mounted on a tripod with an angular mount. The resulting system also provides azimuth and elevation measurements. A laser rangefinder, also known as a laser telemeter, is a rangefinder that uses a laser beam to determine the distance to an object.
Lunar Laser Ranging Experiment from the Apollo 11 mission. Lunar Laser Ranging (LLR) is the practice of measuring the distance between the surfaces of the Earth and the Moon using laser ranging. The distance can be calculated from the round-trip time of laser light pulses travelling at the speed of light, which are reflected back to Earth by ...
Ground sample distance. In remote sensing, ground sample distance (GSD) in a digital photo of the ground from air or space is the distance between pixel centers measured on the ground. For example, in an image with a one-meter GSD, adjacent pixels image locations are 1 meter apart on the ground. [1] GSD is a measure of one limitation to spatial ...
LiDAR technology (Light Detection and Ranging) is a remote sensing technique that obtains precise 3-D information and distance. [4] The laser receptor calculates the distance by the travelling time between emitting and receiving laser pulses. [4] LiDAR produces topographic maps, and it is useful for assessing the natural environment.
Revenue. $61.92 million (2021) [2] Number of employees. 407 [2] (Dec 2021) Website. velodynelidar.com. Velodyne Lidar is a Silicon Valley –based lidar technology company, headquartered in San Jose, California. It was spun off from Velodyne Acoustics in 2016. [3] As of July 2020, the company has had about 300 customers. [4]
Time of flight. Basic time-of-flight principles applied to laser range-finding. Time of flight (ToF) is the measurement of the time taken by an object, particle or wave (be it acoustic, electromagnetic, etc.) to travel a distance through a medium. This information can then be used to measure velocity or path length, or as a way to learn about ...
ICESat-2 (Ice, Cloud, and Land Elevation Satellite 2), part of NASA 's Earth Observing System, is a satellite mission for measuring ice sheet elevation and sea ice thickness, as well as land topography, vegetation characteristics, and clouds. [9] ICESat-2, a follow-on to the ICESat mission, was launched on 15 September 2018 onboard Delta II as ...