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RIEGL VQ-840-G

RIEGL VQ-840-G
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Compact Topo-Bathymetric Airborne Laser Scanner with Online Waveform Processing and Full Waveform Recording • designed for combined topographic and bathymetric airborne and UAV-based survey • high accuracy ranging based on echo digitization and online waveform processing with multiple-target capability • concurrent comprehensive full waveform storage for all measurements for subsequent full waveform analysis • high spatial resolution due to measurement rate of up to 200 kHz and high scanning speed of up to 100 scans/sec • integrated inertial navigation system (optional) • additional, fully integrated infrared laser rangefinder (optional) • integrated digital camera (optional) • compact, lightweight and robust housing compliant with typical hatches in aircrafts and with stabilized platforms The RIEGL® VQ-840-G is a fully integrated compact airborne laser scanner for combined topographic and bathymetric surveying. The system can be offered optionally with an integrated and factory-calibrated IMU/GNSS system and with an optional camera or IR rangefinder. The VQ-840-G is a compact and lightweight LiDAR system to be installed on various platforms including UAVs. The scanner carries out laser range measurements for high resolution surveying of underwater topography with a narrow, visible green laser beam, emitted from a pulsed laser source. Subject to clarity, at this particular wavelength the laser beam penetrates water enabling measurement of submerged targets. The distance measurement is based on the time-of-flight measurement with very short laser pulses and subsequent echo digitization and online waveform processing. To handle target situations with most complex multiple echo signals, beside the online waveform processing the digitized echo waveforms can be stored on the removable data storage card for subsequent off-line full waveform analysis. The laser beam is deflected in an elliptic scan pattern and hits the water surface at an incidence angle with low variation. The VQ-840-G can be complemented with an inertial navigation sensor for subsequent estimation of the instrument’s location and orientation. As an option either a high-resolution digital camera or an infrared laser rangefinder can be integrated to supplement the data gained by the green laser scanner. The rugged internal mechanical structure together with the dust- and splash water proof housing enables long-term operation on airborne platforms. Typical applications include • coastline and shallow water mapping • surveying for hydraulic engineering • hydro-archeological-surveying • river surveying • repeated survey of water reservoirs visit our website www.riegl.com

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RIEGL VQ-840-G Scan Pattern transmitted laser pulse elliptic scan of green laser scanner received echo signal surface echo bottom echo shoreline bottom echo water surface surface echo seabed Point pattern and density for UAV applications flying altitude 75 m, flying speed 10 m/sec, scan rate 69 lps, pulse repetion rate 50 kHz, average point density: 92 points/sqm grey lines: scan trace on ground, green dots: points on the ground (dark green: forward look, light green: backward look) Point pattern and density for helicopter applications flying altitude 150 m, flying speed 26 m/sec, scan rate...

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RIEGL VQ-840-G Perspective View connector panel exit window for camera or IR rangefinder beam exit window RIEGL VQ-840-G Installation Examples Complemented by an optional IMU/GNSS system and further options like a high-resolution digital camera or an IR rangefinder, the RIEGL VQ-840-G represents a fully integrated system with low weight for integration on various aircraft platforms including UAVs. UAV integration example: RIEGL VQ-840-G installed on RiCOPTER-M RIEGL VQ-840-G (with external IMU) installed on GSM-4000 stabilized platform to be used in a helicopter or fixed-wing aircraft...

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RIEGL VQ-840-G Technical Data Export Classification The Topo-Bathymetric Airborne Laser Scanner VQ-840-G has been designed and developed for commercial topographic, hydrographic and bathymetric surveying applications. The VQ-840-G is subject to export restrictions as set up by the Wassenaar Arrangement. It is classified as dual-use good according to position number 6A8j3 of the official Dual-Use-List to be found on site http://www.wassenaar.org. Within the European Union, (Regulation (EU) No. 2021/821) implements the export restrictions of the Wassenaar Arrangement. The corresponding...

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RIEGL VQ-840-G Technical Data (Optional Components) IMU/GNSS (optional) IMU Accuracy 1) Roll, Pitch 0.015° Heading 0.035° IMU Sampling Rate 200 Hz Position Accuracy (typ.) horizontal / vertical <0.05 m / <0.1 m Integrated Digital Camera (optional) 2) RGB Camera Sensor Resolution 12 MPixel Sensor Dimensions (diagonal) 17.5 mm (4112 x 3008 px) Focal Length of Camera Lens 16 mm Field of View (FOV) approx. 47° x 36° Interface GigE Data Interfaces Configuration Scan Data Output GNSS Interface 3) General IO & Control Camera Interface Removable Storage Card Internal Data Storage 1) accuracy...

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