Coastal Zone Mapping and Imaging Lidar (CZMIL)

Transcription

1 Coastal Zone Mapping (CZMIL) Shallow Survey 2012 Wellington, New Zealand Christopher L. Macon U.S. Army Corps of Engineers, Mobile District Joint Airborne Lidar Bathymetry Technical Center of expertise 22 February 2012 US Army Corps of Engineers Joint Airborne Lidar Bathymetry Technical Center of Expertise

2 Joint Airborne Lidar Bathymetry Technical Center of Expertise SOPs OPERATIONS Collection areas Annual Technical Workshop June 2012, Chicago Sensors and systems RESEARCH AND DEVELOPMENT Data exploitation US Army Corps of Engineers Joint Airborne Lidar Bathymetry Technical Center of Expertise

3 Lidar Program History Data Fusion Spectral Imagery 94 SHOALS Photogrammetry 99 SHOALS Topography 03 CHARTS 05 CHARTS 12 CZMIL Bathymetry ,000 3,000 10,000 Measurements/Sec

4 USACE National Coastal Mapping Program Products ASCII XYZ Aerial photos Zero contour Aerial photo mosiacs 1-meter bathy/topo DEM LAS format topo 1-meter bathy/topo bare earth DEM Hyperspectral image mosaics Laser reflectance images Basic landcover classification Volume change

5 Coastal Zone Mapping and Imaging Requirement Operational system with automated / integrated processing 1, products 2, and operations 3 1 Processing Automated processing, editing, products, and metadata Integrated processing, editing and products Automated / integrated survey implementation Runs on COTS hardware 3 Operations MTBF 1,000 operational hours One airborne operator or less Three field processors or less Average 200 square nautical miles per week One KGPS base station or less per 200 km of coast Twenty four months continuous field operations 90%) Five days average in-field repair time All sensors calibrate with in 24 hours Manufacturer maintenance & repair support 2 Products Collection : product ratio of 1:5 Accurate bathy from 0-20 meters (+/- 30 cm; 2 σ) at 2 m resolution Accurate topo (+/- 15 cm; 2 σ) at 0.5 m resolution Spectral imagery at 50 cm resolution Identification of 2m x 2m x 2m navigation hazards. Seamless topo / bathy 1m digital elevation model (DEM) Seamless topo / bathy 1m bare earth DEM Urban feature dimensions & attribution RGB orthorectified imagery (0.5 m pixel resolution; 2 m positioning accuracy) Shoreline 0 NAVD88 USGS Dhi elevations Bottom reflectance images Water & water surface characterization Habitat identification 2m accuracy Dry beach Wet beach Dune Vegetated dune Vegetation types Urban features (buildings & roads) Sand v. hard bottom v. lag v. cobble v. clay v. seagrass v. vegetation Sediment grain size & type 5

6 Sensor Suite Coastal Zone Mapping and Imaging Operator Rack Laser Rack Lidar Sensor Head CASI-1500 T-4800 Camera Control Rack Thermal Rack

7 Coastal Zone Mapping CZMIL lidar: HYBRID approach Conical Scanning y x x

8 Operational Scenario Bathymetry Diameter of laser spot = 2.5 meters Diameter of largest void = 0.54 meters Coastal Zone Mapping 140 kts 400 m Topography Diameter of laser segment spot = 0.83 meters Diameter of largest segment void = 0.7 meters 290 m

9 Coastal Zone Mapping and Imaging Sensor Design Cables, Cooling, Connectors

10 Laser Coastal Zone Mapping and Imaging

11 Lidar bathymetry operating principles/limitations

12 Lidar bathymetry operating principles/limitations

13 Counts CZMIL compared to SHOALS Coastal Zone Mapping and Imaging Ft. Lauderdale water, 25m (40mrad channel, K d 0.12 m -1 ) P3 Ft. Lauderdale, 1.5m (K d 0.12 m -1, Shallow water channels) CZMIL SHOALS (Actual) Better SNR and shorter system response CZMIL Detect bottom deeper More accurate input to algorithms Better shallow water discrimination Higher Signal, Better SNR Better (shorter) system response P Time bins(ns)

14 Data Processing System Coastal Zone Mapping and Imaging

15 Data Processing System (L3) Coastal Zone Mapping and Imaging

16 Data Fusion Products Water leaving reflectance Water column attenuation Coastal Zone Mapping CDOM absorption Chl concentration Active seafloor reflectance Spectral seafloor reflectance

17 CZMIL Geometric Calibrator Coastal Zone Mapping and Imaging Geometric calibration can be performed using a planar featureless surface - Airport Runway - Sea surface Parameters generated using a weighted least squares adjustment images courtesy of Dr. Michael Gonsalves, LT/NOAA (NOS/NGS/RSD)

18 In-field Diagnostics Coastal Zone Mapping and Imaging 18

19 Coastal Zone Mapping and Imaging Environmental and Proxy Testing Airworthiness DO-160F Style Testing Vibration Shock/crash safety Temperature Humidity Fire/flammability Emission of radio frequency energy Power input Voltage spike

20 Coastal Zone Mapping and Imaging Lidar Coastal Zone Mapping Environmental and Proxy Testing BUILDING STRONG

21 Coastal Zone Mapping and Imaging Environmental and Proxy Testing Hard Target Tests Hard target at m (attenuator) Hard target at m and fiber delay(attenuator) Fiber delay Target return

22 Schedule Coastal Zone Mapping and Imaging Early March 2012: integration of CZMIL into aircraft Acceptance Tests MS Barrier Islands (Mud/sand bottom) Late March 2012 Fort Lauderdale, FL (Coral/Bright sand bottom) Mid April 2012

23 Questions? Coastal Zone Mapping and Imaging Lidar Christopher L. Macon