RIEGL VQ 880 G Laser Scanner System for Topo Bathymetric Surveying. IR laser scanner channel OCTOBER 2015

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1 RIEGL VQ 880 G Laser Scanner System for Topo Bathymetric Surveying with NEW optional IR laser scanner channel OCTOBER 2015

2 VQ 880 G Highlights excellently suited for combined hydrographic and topographic airborne surveying high accuracy ranging based on echo digitization and online waveform processing with multiple target capability concurrent waveform data output high spatial resolution due to narrow laser beam, high pulse repetition rate, and high scanning speed NEW: optional fully integrated infrared laser scanner

3 Applications RIEGL topo bathy laser scanners successfully employed for a great variety of applications Coastline and shallow water mapping Acquiring base data for flood prevention Habitat mapping Measurement of aggradation zones Surveying for hydraulic engineering Hydro archeological surveying Riverine Systems

4 VQ 880 G key specifications wavelength 532 nm (visible green light) measurement range topography 2500 mat ρ 20% 3600 m at ρ 60% measurement range hydrography 1.5 Secchi depth bright ground ranging accuracy 25 mm Scanner field of view 40 Laser beam divergence selectable, mrad measurement rate up to 550 khz scan speed up to 80 revolutions/second laser safety Laser Class 3B multiple time around processing yes

5 VQ 880 G System configuration & interfaces aperture of IR scanner power consumption: 600W weight: 62 kg dimensions: 444 x 444 x 615 mm³

6 VQ 880 G System configuration & interfaces Gbit Ethernet high speed fiber link to RIEGL DR1560 data recorder V DC power supply integrated RGB camera integrated IMU/GNSS RIEGL DR1560 for data storage

7 RIEGL Software RiHYDRO (RiPROCESS Add on) Point cloud classification Water surface modelling Refraction correction

8 Principle of refraction correction

9 Principle of refraction correction

10 Principle of refraction correction

11 Principle of refraction correction

12 Principle of refraction correction

13 Principle of refraction correction

14 Generation of water surface model (WSM) VQ 880 G record: 2 scan segments from the green laser scanner 1 scan from the IR laser scanner 2 resulting water surface models (one for each segment) supported by IR channel data t 1 t 2 forward scan segment backward scan segment IR laser scanner WSM backward WSM forward

15 Generation of WSM Results WSM in case of high waves: elevation WSM (displayed as normal vector field) and water surface points (z color coded)

16 Refraction correction Intersection of ray with WSM:

17 VQ 880 G Campaign in Florida Areas of Interest Marathon

18 VQ 880 G Campaign in Florida Areas of Interest Marathon Ft. Desoto

19 VQ 880 G Campaign in Florida Areas of Interest Marathon Ft. Desoto North Key Largo

20 VQ 880 G Campaign in Florida Areas of Interest Marathon Ft. Desoto North Key Largo Summerland Key

21 VQ 880 G Campaign in Florida Areas of Interest Marathon Ft. Desoto North Key Largo Summerland Key Crocker Reef

22 VQ 880 G Campaign in Florida Areas of Interest Marathon Ft. Desoto North Key Largo Summerland Key Crocker Reef Mullet and Cottrell Keys

23 VQ 880 G Campaign in Florida Sensor Installation ACA Cessna 206 NOAA Twin Otter

24 Project Highlights Ft Desoto

25 Project Highlights Ft Desoto

26 Project Highlights Ft Desoto 5m x 5m section 27.6 pts/m² was observed

27 UAV bathymetry system BathyCopter word s first small UAV based surveying system for hydrographic applications

28 Key specifications Operation altitude: m Penetration: > 1 Secchi depth Laser Class: 2M Pre detection averaging (performance improvement at adverse conditions) Echo digitization, waveform recording

29 Sensor payload Measurement rate: 4 khz Laser pulse duration: < 1 ns Measurement direction: fixed, 8 off nadir IMU: APX15 Camera: Sony Alpha 6000 Weight: < 6.5 kg Power supply: 24 V, 2.6 A (65 W)

30 Mode of operation

31 Mode of operation water surface water bottom land

32 Conclusion The recently introduced VQ 880 G: Improved measurement rate Improved waveform recording Improved penetration RIEGL provides its own powerful tool for point classification, water surface modeling, and refraction correction RIEGL software workflow offers interfaces for custom specific point classification or WSM

33 BathyCopter in flight

34 Data visualization

35 Data visualization

36 Data visualization

37 Profiling thewaterbody

38 Thank you for your kind attention! Peter Rieger