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RIEGL VQ-480i - 6 Pages

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RIEGL VQ-480i
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Catalog excerpts

Airborne Laser Scanner with Online Waveform Processing RIEGL VQ-480i • high-accuracy ranging based on echo digitization and online waveform processing • high laser repetition rate fast data acquisition The V-Line® Airborne Laser Scanner RIEGL VQ-480i provides high speed data acquisition using a narrow infrared laser beam and a fast line scanning mechanism. High-accuracy laser ranging is based on RIEGL´s unique echo digitization and online waveform processing, which allows achieving superior measurement results even under adverse atmospheric conditions, and the evaluation of multiple target echoes. • multiple target capability unlimited number of targets The scanning mechanism is based on a fast rotating multi-facet poly- • perfectly linear scan lines • compact, rugged, and lightweight design The RIEGL VQ-480i is a very compact and lightweight scanner, moun- • electrical interfaces for GPS data string and Sync Pulse (1PPS) helicopters or UAVs. The instrument requires only one power supply and • mechanical interface for IMU mounting gonal mirror, which provides fully linear, unidirectional and parallel scan table in any orientation and even under limited space conditions on provides line scan data via the integrated LAN-TCP/IP interface. The binary data stream can easily be decoded by user-designed software making use of the available software library RiVLib. • integrated LAN-TCP/IP interface Typical applications include • Corridor Mapping • Power Line Inspection • Cultural Heritage Mapping visit our website www.riegl.com

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Laser Product Classification    Class 1 Laser Product according to IEC60825-1:2007 The following clause applies for instruments delivered into the United States: Complies with 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice No. 50, dated June 24, 2007. Measuring Principle    time of flight measurement, echo signal digitization, online waveform processing, multiple-time-around-processing 1) Rounded values. 2) Reflectivity p > 20%, ±30° FOV, additional roll angle ±5°. 3) Typical values for average conditions. Maximum range is specified for flat targets with size in excess...

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Maximum Measurement Range & Point Density RIEGL VQ®-480i PRR = 50 kHz Maximum Measurement Range [m] MTA1: no ambiguity / 1 transmitted pulse „in the air” @ visibility 23 km @ visibility 15 km @ visibility 8 km Maximum Measurement Range [m] MTA1: no ambiguity / 1 transmitted pulse „in the air” MTA2: 2 transmitted pulses „in the air” @ visibility 23 km @ visibility 15 km @ visibility 8 km Maximum Measurement Range [m] MTA1: no ambiguity / 1 transmitted pulse „in the air” MTA2: 2 transmitted pulses „in the air” @ visibility 23 km @ visibility 15 km @ visibility 8 km The following conditions are assumed...

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Target Reflectivity [%] Target Reflectivity [%] MTA1: no ambiguity / 1 transmitted pulse „in the air" MTA2: 2 transmitted pulses „in the air" MTA3: 3 transmitted pulses „in the air" — @ visibility 23 km @ visibility 15 km __ @ visibility 8 km Altitude = 800 ft AGL, Speed = 60 kn Resulting Point Density ~ 23 pt/m2 Target Reflectivity [%] MTA1: no ambiguity / 1 transmitted pulse „in the air" MTA2: 2 transmitted pulses „in the air" MTA3: 3 transmitted pulses „in the air" MTA4: 4 transmitted pulses „in the air" @ visibility 23 km @ visibility 15 km @ visibility 8 km Altitude = 1000 ft AGL, Speed =...

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beam exit front view side view rear view 189 nitrogen desiccant base block mounting threads all dimensions in mm ® origin of scanner s local coordinate system

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Example for a profile of scan data processed in MTA zones 1 to 4 Multiple-time-around Data Acquisition and Processing In time-of-flight laser ranging a maximum unambiguous measurement range exists, which is defined by the laser pulse repetition rate and the speed of light. In case the echo signal of an emitted laser pulse arrives later than the emission of the subsequently emitted laser pulse, the range result becomes ambiguous - an effect known as „Multiple-Time-around“ (MTA). The RIEGL VQ-480i allows ranging beyond the maximum unambiguous measurement range using a sophisticated modulation scheme...

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