HawkEye III - A new deep penetrating bathymetric LIDAR system

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1 Please insert a picture (Insert, Picture, from file). Size according to grey field (10 cm x 25.4 cm). Scale picture: highlight, pull corner point Cut picture: highlight, choose the cutting icon from the picture tool bar, click on a side point and cut HawkEye III - A new deep penetrating bathymetric LIDAR system Anders Ekelund, Managing Director, AHAB European LIDAR mapping forum - 12 th of November 2013

2 Airborne Hydrography AB World recognised manufacturer of Airborne LIDAR systems Founded 2002 Technology based on Swedish defense developments during 1980:s and 1990:s within bathymetric LIDAR Products HawkEye Deep penetrating airborne bathymetric LIDAR system Chiroptera Shallow water bathymetric LIDAR system DragonEye Topographic LIDAR system

3 Leica Aquisition of AHAB - 8th of October 2013 Hexagon extends market leadership in geospatial technologies with the acquisition of Airborne Hydrography AB ( AHAB ) "Highly accurate hydrographic surveys are of particular importance when it comes to monitoring and managing the effects of changing sea-levels, flooding, or coastal damage due to natural disasters, said Hexagon AB President and CEO Ola Rollén. The AHAB portfolio of products will enable Hexagon to expand into the growing deep and shallow water bathymetry and coastal topography markets which are indispensable when it comes to the safety of those that live in coastal regions and the expedited recovery in these areas in the face of the disaster. 3

4 HawkEye II => HawkEye III HawkEye II HawkEye III 4

5 HawkEye II vs HawkEye III HawkEye II Bathymetric data capture Deep: 4 KHz ( 1 KHz prf, 4 pixel receiver) Shallow: 4 KHz (1 KHz, 4 pixel receiver) Full waveform, both channels Depth penetrion K x D = 4 (about secchi) Topographic data capture 128 KHz (16 KHz, 8 pixel receiver) Discrete return system Max altitude: 500 m HawkEye III Bathymetric data capture Deep: 10 KHz (10 KHz, single receiver) Shallow: 35 KHz (35 KHz, single receiver) Full waveform, both channels Real time waveform analysis K x D = 4 (about secchi) Topographic data capture Up to 400 KHz (400 KHz, single receiver) Full waveform capture Real time waveform analysis Max altitude: 1.5 Km 5

6 HawkEye II vs HawkEye III HawkEye II Scan mechanism 2 axis controlled scanner mirror HawkEye III Scan Mechanism Oblique LIDAR 6

7 Oblique LIDAR Oblique LIDAR - elliptical LiDAR scanning Superior coverage of vertical and tall objects such as buildings, walls, piers Less shaddow effects in the data Less sensitive for surface wave interaction LiDAR waveform capture from two different angles Increased accuracy compared to the previous gimbal design

8 3 Channel LIDAR Why? Each sensor optimised for its tasks Laser divergence Laser energy Receiver sensitivity Receiver field of view Apperture size Receiver type Laser pulsewidth PRF Scanner speed Optics Topo Deep Bathy Shallow Bathy 8

9 3 Channel LIDAR Why? Topo No water surface interference No broaderning of the beam due to water volume scattering No losses due to water volume attunuation Shallow Bathymetry Full water surface interference Some broaderning of the beam due to water volume scattering Some energy losses due to water volume attunuation Deep Bathymetry Full water surface interference Large broaderning of the beam due to water volume scattering Huge energy losses due to water volume attunuation Energy losses are exponential with depth Broardening of beam is approximately linear with depth 9

10 Key performance of a bathymetric LIDAR system Correctly measure water surface level Water refraction Change of speed of light: v water v air /1.33 Change of direction of light: tan (α 1 ) 1.33 * tan (α 2 ) Water refraction correction is needed both in depth and in northing easting Backscatter and Attunuation Changed processing algorithms in the water volume => Automatical measurement of the local water surface level Handle water surface gradient between elipsoid and geoide plus swell in ocean environment Handle slooping water surfaces typical in river environments Measure hight of local gravity waves for increased accuracy

11 Water surface measurement 11

12 Water surface measurement 1 meter waves => correpsonds to about 25 cm variation on sea bed if a mean water surface is used for the refraction correction By local water surface elevation measurement this variation can to a large extent be eliminated 12

13 Example between flight line accuracy shallow channel

14 Example between flight line accuracy shallow channel Vertical spread Top to Top 7 cm

15 Key performance of a bathymetric LIDAR system Distiguish between green returns on land, green returns from water surface and green returns within the water volume (seabed) => Automatical classification of land, surface and sub-surface returns Land Water surface Sea-Bed

16 AHAB products DragonEye 400 Topo LIDAR Leica FMS Leica: Mission pro Leica: Flight pro Leica Camera Leica RCD MPIX RGB+IR AHAB Operators Console Operator LIDAR interface Touchscreen AHAB LiDAR Control Unit Full waveform 1,8 GSa/s, 170 Gflops 12 bit digitization Topo-scanner 400 khz 1,5 km LIDAR Survey Studio LiDAR processing software DragonEye Sensor head Output data

17 AHAB products Chiroptera Shallow bahtymetric LIDAR Leica FMS Leica: Mission pro Leica: Flight pro Leica Camera Leica RCD MPIX RGB+IR Topo-scanner 400 khz 1,5 km AHAB Operators Console Operator LIDAR interface Touchscreen AHAB LiDAR Control Unit Full waveform 1,8 GSa/s, 170 Gflops 12 bit digitization Shallow Bathy 35 khz 1,5 Secchi LIDAR Survey Studio LiDAR processing software Chiroptera Sensor head Output data

18 AHAB products HawkEye III Deep penetrating bathy LIDAR Leica FMS Leica: Mission pro Leica: Flight pro Leica Camera Leica RCD MPIX RGB+IR AHAB Operators Console Operator LIDAR interface Touchscreen AHAB LiDAR Control Unit Full waveform 1,8 GSa/s, 170 Gflops 12 bit digitization Topo-scanner 400 khz 1,5 km Deep Bathy 10 khz 3 Secchi Shallow Bathy 35 khz 1,5 Secchi LIDAR Survey Studio LiDAR processing software Output data HawkEye III Sensor head

19 HawkEye III Pure Topo 19

20 HawkEye III Topo and Shallow 20

21 HawkEye III All Channels 21

22 HawkEye III - Topo and Shallow 22

23 HawkEye III Topo, Shallow and Deep 23

24 LIDAR Survey Studio - LiDAR processing software LiDAR processing software for all AHAB products DragonEye, Chiroptera, HawkEye Convertion of all LiDAR waveforms to LiDAR returns Flight trajectory import Automatic water refraction correction Automatic LIDAR data classification 3D viewer / editor 3D visualisation (zooming, panning, rotating...) Viewing LiDAR data by classes Cleaning / Editing Lidar data Land Sea-Bed Automatic data classification Water surface 24

25 LIDAR Survey Studio - LiDAR processing software LiDAR waveform viewer HawkEye III and Chiroptera stores all bathymetric waveforms Viewing all bathymetric LIDAR waveforms Local water surface altitude for each waveform HawkEye III Deep channel waveform 25

26 LIDAR Survey Studio - LiDAR processing software Lidar Waveform 3D Lidar Dataset RGB Image Cross section tool 26

27 LIDAR Survey Studio - LiDAR processing software Raw Intensity Image 27

28 LIDAR Survey Studio - LiDAR processing software Q/A tools LSS Q/A accuracy assesment tool 28

29 LIDAR Survey Studio - LiDAR processing software Integrated LiDAR calibration tool Automatic LIDAR calibration tool Calibrates automatically about 15 parameters Automatic LiDAR calibration 29

30 LIDAR Survey Studio - LiDAR processing software Export of LiDAR data AHAB open waveform format LAS 1.4 Reporting Google earth DEM image as an kmz file Chiroptera demo Ft Lauderdale 30

31 Ft Lauderdale: Objects on sea-floor 31

32 Motala river Lake Vättern Motala River Lake Boren 32

33 Transition Land - Water 33

34 Ft Lauderdale - Pier

35 HawkEye III - Summary HawkEye III is a new deep penetrating bathy LIDAR HawkEye III has similar topo and shallow channels as Chiroptera product. A deep channel has been added. Upgrade from Chiroptera to HawkEye III is offered HawkEye III utilizes AHAB LIDAR survey studio processing software with all latest developments

36 HawkEye III - Summary HawkEye II => HawkEye III Improved accuracy Improved target detection capability Dedicated topo channel Dedicated shallow water channel No shallow water limit About 50% reduction in flight time for the same data density (deep)