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For Lidar, Many Happy Returns

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Hank Hogan, Contributing Editor, [email protected]

For light detection and ranging (lidar) scanners, the returns are in – and they’re good. Innovations have made lidar scanners, which emit laser pulses and capture the returning light to determine distance to an object or characteristics of air, smaller and lighter in weight than ever. Their resolution has improved, as has their ability to capture more returns per pulse. Lighter scanners are a good thing, said Nicholas Ferguson, business planning and development manager at Network Mapping Ltd. in Chobham, UK. “The weight of lidar scanners has significantly decreased. This allows helicopter...Read full article

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    Published: November 2009
    Glossary
    doppler shift
    The magnitude, expressed in cycles per second, of the alteration of the wave frequency observed as a result of the Doppler effect.
    infrared
    Infrared (IR) refers to the region of the electromagnetic spectrum with wavelengths longer than those of visible light, but shorter than those of microwaves. The infrared spectrum spans wavelengths roughly between 700 nanometers (nm) and 1 millimeter (mm). It is divided into three main subcategories: Near-infrared (NIR): Wavelengths from approximately 700 nm to 1.4 micrometers (µm). Near-infrared light is often used in telecommunications, as well as in various imaging and sensing...
    lidar
    Lidar, short for light detection and ranging, is a remote sensing technology that uses laser light to measure distances and generate precise, three-dimensional information about the shape and characteristics of objects and surfaces. Lidar systems typically consist of a laser scanner, a GPS receiver, and an inertial measurement unit (IMU), all integrated into a single system. Here is how lidar works: Laser emission: A laser emits laser pulses, often in the form of rapid and repetitive laser...
    near-infrared
    The shortest wavelengths of the infrared region, nominally 0.75 to 3 µm.
    aerosolsair densityair temperatureair turbulenceAndrew KlekociukAntarcticaBrent W. GelharcamerasCanadaCCDCommunicationsContinuum Inc.Doppler shiftDPSS lasersFeaturesfiber lasersfixed-wing aircraftHank HoganhelicopterinfraredITT Space Systems DivisionJohn E. Barneslidarlidar scannersLynxmapping systemsMark NealMichigan Aerospace Corp.Multi-functional Fiber Laser LidarNASANational Oceanic and Atmospheric AdministrationNd:YAGnear-infrarednear-IRNetwork MappingNicholas FergusonOptech.Peter TchorykSensors & Detectorssite surveyingsurveystime-of-flightturbine bladesUKwind velocityLasers

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