Remote Sensing Sensor Integration Erica Tharp LiDAR Supervisor
Table of Contents About 3001 International Inc Remote Sensing Platforms Why Sensor Integration? Technical Aspects of Sensor Integration Limitations of Sensor Integration Benefits of Sensor Integration
Operating Sectors Aerospace Systems Electronic Systems Information Systems Shipbuilding Technical Services Large Scale Systems Integration C 4 ISR Unmanned Systems Airborne Ground Surveillance / C2 Naval BMC2 Global / Theater Strike Systems Electronic Combat Operations ISR Satellite Systems Missile Defense Satellite Systems MILSATCOM Systems Environmental & Space Science Satellite Systems Directed Energy Systems Radar Systems C 4 ISR Electronic Warfare Naval & Marine Systems Navigation & Guidance Military Space Government Systems Command & Control Systems Network Communications Intelligence, Surveillance & Reconnaissance Systems Enterprise Systems and Security IT/Network Outsourcing Intelligence Federal, State/Local & Commercial Homeland Security & Health Naval Systems Integrator Surface Combatants Expeditionary Warfare Ships Auxiliary Ships Marine Composite Technology Coast Guard Cutters Commercial Ships Nuclear Aircraft Carriers Nuclear Submarines Fleet Maintenance Aircraft Carrier Overhaul & Refueling Systems Support Base and Infrastructure Support Range Operations Maintenance Support Training and Simulations Technical and Operational Support Live, Virtual and Constructive Domains Life Cycle Optimization Performance Based Logistics Modifications, Repair and Overhaul (MRO) Supply Chain Management Lead Support Integrator (LSI) Strategic Space Systems
3001 Civil Works Offices
Orthophotography 2 Zeiss DMC (Digital Mapping Camera System) Frame based sensor 4 panchromatic & 4 RGB-IR camera heads Availability of multi-spectral information Fully automated workflow Forward motion compensation -> Resolutions > 5cm 3 Leica ADS60 Push broom sensor (line scanning) Seamless strip imagery along each flight line Three sensors in one - panchromatic, color and false color sensors at 3 different angles Reduced ground control requirements No FMC -> Resolutions > 10 cm 2 Rollei AIC Shutter speed of 1/1000 th second Stable one-piece aluminum alloy body for enhanced endurance in aerial applications 4 second cycle time Built in light sensor Aspect ratio of 3:4
LiDAR Systems Leica ALS50 II Planimetric spacing with an accuracy of 11cm Operational altitude of 200 6000 m AGL 4 return detection system (1st, 2nd, 3rd, and last) Pulse rates up to 150kHz FOV up to 75 Optech 3100 Operational altitude of 80 3500m AGL 33-100 khz programmable laser repetition rate 4 return detection system (1st, 2nd, 3rd, and last) FOV up to 50 Optech Gemini Operational altitude of 150-4000 m AGL 167 khz laser repetition rate 4 return detection system (1st, 2nd, 3rd, and last) FOV up to 50 62% increase in data coverage and effective collection rate 6
Airborne Platforms & Sensors
Why the need for sensor integration? Time Differences between the imagery and topographic data differences evident in areas of construction, agriculture, etc. Money Cost of acquiring multiple data sets Multiple lifts Double the fuel and crew 8
Why the need for sensor integration?
Technical Aspects of Sensor Integration The Optech Gemini and RolleiMetric s AIC modular LS medium format camera have been integrated sharing the same housing, IMU and airborne GPS. The maximum point density that can be achieved is 10 points per ^2m at 1000ft AGL, 15deg FOV and 70 KHz, this varies greatly depending on flying height and speed. The Rollei comes equipped with: 2 super angulon 50mm F/2.8 a pixel size of 9 microns maximum exposure rate of 4 seconds an automatic aperture mode with the shutter priority when the light meter is used
Technical Aspects of Sensor Integration There is a 3:5 ratio of overlap with the LiDAR and the Rollei. Therefore, if the LiDAR is planned with 30% overlap the Rollei images will have 50% overlap. The field of view on the Rollei opens up to 45 so any LiDAR flight plan with up to a 45 FOV the imagery will align properly. The imagery acquisition is based on the LiDAR flight plan. The forward lap of the imagery is calculated in real time using the LiDAR. As the elevation increases the image spacing becomes tighter.
Limitations of Sensor Integration Due to the limitations of the imagery acquisition can only occur during certain hours of the day Integration does not decrease the survey work The Rollei produces 2.7 more frames than the DMC, which then have to be stitched together The LiDAR processing efforts are enhanced but not reduced due to the imagery
Benefits of Sensor Integration The LiDAR model is used to ortho-rectify imagery The imagery enhances the creation of breaklines Feature detection is enhanced due to the use of the two simultaneously acquired topographic and visual data sets May provide easier access to restricted airspace since you will only have to enter the airspace once to collect both data sets Reduces air traffic control headaches 13
Benefits of Sensor Integration Both the imagery and the LiDAR can be used independently, together as overlays in a GIS, or to fuse the two into a single LAS format data set where the RGB values from the imagery are combined with the LiDAR X,Y,Z values Helps to monitor the progression of dynamic landforms i.e. coastlines, forestry, faults etc. Provides quick overviews of emergency situations i.e. Hurricanes, tornados Reduction in mobilization costs (fuel, maintenance, crew) 14
Emergency Response.
Summary So with the Optech Gemini and the Rollei AIC 3001inc can offer high resolution spatial data products of exceptional quality at a reduced cost.
3001, A Northrop Grumman Company 17