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Space-Borne Lidar Enables Continuous View of Plankton Cycles in Earth’s Polar Regions

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CORVALLIS, Ore., Jan. 27, 2017 — A space-based sensor that can penetrate fog, clouds and darkness has given scientists a decade-long set of images that provide a continuous view of polar phytoplankton biomass cycles. Traditional passive sensors, when used in regions that experience periods of constant night and prevailing low solar elevations, are unable to observe marine activity for many consecutive months each year. Through the use of space-borne lidar, scientists overcame the limitations of conventional passive satellite ocean color retrievals. An artist's rendering shows a laser beam from a satellite-mounted lidar...Read full article

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    Published: January 2017
    Glossary
    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...
    Research & TechnologyAmericasImagingLaserslidarSensors & DetectorssatelliteNASAenvironment

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