Catalog excerpts
Versatile Topo-Bathymetric Airborne Laser Scanner p with Online Waveform Processing and Full Waveform Recording RIEGL VQ-840-GL 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) integrated digital camera (optional) compact, lightweight and robust housing compliant with typical hatches in aircrafts and with stabilized platforms The RIEGL® VQ-840-GL is a fully integrated, compact airborne laser scanner for combined topographic and bathymetric surveying. The proven form factor and the use of very lightweight material enable a reduced weight of less than 10 kg (22 lbs), making the VQ-840-GL suitable for integration into crewed aircraft and 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-GL can be complemented with an inertial navigation sensor for subsequent estimation of the instrument's location and orientation. As a further option a high-resolution digital camera can be integrated. 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 RIEGL LASER MEASUREMENT SYSTEMS Airborne Laser Scanning Data Sheet
Open the catalog to page 1RIEGL VQ-840-GL 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...
Open the catalog to page 2Data Sheet Copyright RIEGL Laser Measurement Systems GmbH © 2024- All rights reserved. 3
Open the catalog to page 3RIEGL VQ-840-GL Perspective View connector panel beam exit window RIEGL VQ-840-GL Installation Examples Complemented by an optional IMU/GNSS system and an optional high-resolution digital camera, the RIEGL VQ-840-GL represents a fully integrated system with low weight for integration on various aircraft platforms including UAVs. UAV integration example: RIEGL VQ-840-GL installed on RiCOPTER-M RIEGL VQ-840-GL (with external IMU) installed on GSM-4000 stabilized platform to be used in a helicopter or fixed-wing aircraft Copyright RIEGL Laser Measurement Systems GmbH © 2024– All rights...
Open the catalog to page 4Export Classification The Topo-Bathymetric Airborne Laser Scanner VQ-840-GL has been designed and developed for commercial topographic, hydrographic and bathymetric surveying applications. Laser Product Classification Class 3B Laser Product according to IEC60825-1:2014 The following clause applies for instruments delivered into the United States: Complies with 21 CFR 1040.10 and 1040.11 except for conformance with IEC 60825-1 Ed.3., as described in Laser Notice No. 56, dated May 8, 2019. NOHD 1 21 31 1) NOHD ... Nominal Ocular Hazard Distance 2) beam divergence 6 mrad, laser PRR 50kHz...
Open the catalog to page 5RIEGL VQ-840-GL Technical Data (Optional Components) IMU/GNSS (optional) IMU Accuracy 1 Roll, Pitch 0.015° Position Accuracy (typ.) horizontal / vertical <0.05 m / <0.1 m Sensor Resolution Sensor Dimensions (diagonal) Focal Length of Camera Lens Field of View (FOV) Interface Integrated Digital Camera (optional) 2) RGB Camera 12 MPixel / 24 MPixel 17.5 mm (4112 x 3008 px) 16 mm approx. 47° x 36° GigE Data Interfaces Configuration Scan Data Output GNSS Interface 3) General IO & Control Camera Interface Removable Storage Card Internal Data Storage 1) accuracy specifications for post-processed...
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