Leica - Airborne Digital Sensors (ADS80, ALS60) Update / News in the context of Remote Sensing applications

Luzern, Switzerland, acquired with GSD=5 cm, 2008. Leica - Airborne Digital Sensors (ADS80, ALS60) Update / News in the context of Remote Sensing applications Arthur Rohrbach, Sensor Sales Dir Europe, Middle-East and Africa (EMEA) JRC-GeoCAP Meeting, Taormina, 18-20 Nov 2009

Leica <> Airborne Digital Sensors Update ADS80 - Airborne Digital Sensor Update <> Fast Data Processing (XPro) High Res Mode (HR) ALS60 - Airborne LIDAR Scanner Update <> Outlook Grid approach data processing Full Wave Form Digitizing (WFD)

ADS40 SH52 in Beech 2006 ( Geophenix, France )

Leica ADS80 The Total Digital Airborne Imaging Solution

Leica ADS80 - Pushbroom / CCD layout in focal plane SH81 SH82

Leica ADS80-3 rd generation -System Design / Concept One optical path Tight integration Very few components => Highest Stability

Leica ADS80 - Optical Design / Performance + = Telecentric Lens Thermal and Pressure + Tetrachroid = Equal Resolution Co-registered in Compensated all bands NO PAN-SHARPENING

Narrow Spectral band for Remote Sensing 1 2 Legend 1 Grass 2 Lime Stone 7 3 4 5 6 3 Sand, dry 4 Snow, old 5 Fir tree 6 Asphalt, wet 7 Water

Leica ADS80 Consistent Technical Performance Control Unit CU80 and MM80 MM40 Embedded IPAS20 with GNSS High data throughput of 130 MB/sec Radiometric resolution of compressed data 10-bit and 12-bit Recording interval 1 ms Data modes: ADS80 data format, raw data, compressed Highlyreliable flash disk technology 364 GB / 768 GB capacityper MM80 / per pair Weight 2.5 kg

Leica ADS80 - Operational Specs / Performance GSD 1.2 / 3 cm => 90 kts GSD 2 / 5 cm => 140 kts GSD 3 / 7.5cm => 190 kts GSD 4 / 10cm => 240 kts GSD 6 / 15cm => 300 kts 768 GB for up to ~ 11.4 h recording at 2.5 ms with 3 pan & 4 spectral bands

New gyro-stabilized sensor mount PAV80 Fastest in stabilizing speed Larger tilt angles available Different payloads accepted Stabilization range in roll Stabilization range in pitch Stabilization range in drift -7 to + 7-8 to + 6-30 to + 30

Leica ADS80 Consistent Technical Performance Mapping accuracies vs GSD

Simultaneous Imagery Luzern, Switz ( Pixel Carpets )

Efficient Data Processing with Leica XPro Processing at the Speed of Flight

Data post processing time Leica XPro workflow Flight 1,200 km 2, 15cm GSD 12 lines, each 80 km, 3 Pan and 8MS Approximately 7h flight at 130knots Total time WS with 6 server cluster User action time Download 400 GB ADS data format 4 h 0.5 h Georeferencing Trajectory calculation geo-referencing of L0 images 0.5 h 0.1 h 0.5 h 0.1 h Aerial triangulation Automatic Point Measurement Bundle Adjustment 0.1 h 0.3 h 0.1 h 0.3 h Ortho photo RGB or FCIR 1,200 km 2 1.7 h 0.1 h 6.7 h 1.6 h Feature extraction Due to image strips slightly faster than in traditional workflow Fly-through Similar to traditional workflow

Data post processing time Leica XPro workflow Flight 1,200 km 2, 50 cm GSD 12 lines, each 80 km, 3 Pan and 8MS Approximately 7h flight at 130knots Total time WS with 6 server cluster User action time Download 40 GB ADS data format 30 Georeferencing Trajectory calculation geo-referencing of L0 images 3 2 Aerial triangulation Automatic Point Measurement Bundle Adjustment 5 20 Ortho photo RGB or FCIR 1,200 km 2 15 1.5 h Feature extraction Due to image strips slightly faster than in traditional workflow Fly-through Similar to traditional workflow

Leica ADS80 - HR Mode via staggered Nadir Pan SH81 SH82

Leica ALS60 Airborne LIDAR Scanner a complete airborne data collection solution

Fundamentals of multiple-return technology example for 1- and 3-return scenarios 1 st return from tree top 1 st (and only) return from ground 2 nd return from branches 3 rd return from ground

Fundamentals of MPiA technology Single-pulse technology limits pulse rate 1 3 5 2 4

Fundamentals of MPiA technology MPiA allows doubling of pulse rate 1 2 3 4 5 2 3 4 5

ALS60 - Improvements in max Pulse Rate making a great LIDAR even better 33% increase in maximum pulse rate 200 khz at the ground for even higher point density Smooth operating envelope without discontinuities Max Pulse Repetition Frequency (PRF, Hz @ 40 deg FOV) 220000 200000 180000 160000 140000 120000 100000 80000 60000 40000 20000 2 pulses in air 1 pulse in air 0 0 1000 2000 3000 4000 5000 Flight Height (m)

ALS60 the point density you want, the accuracy you need

Large optical aperture the heart of a flexible system

Starting point point cloud block loaded All returns shown Ortho point cloud view Color coded by elevation

Comparison of rendered 1 st returns to point cloud point cloud gridded

Comparison of rendered last returns to point cloud point cloud gridded

Bare earth extraction point cloud gridded

Building extraction point cloud gridded

Tree extraction point cloud gridded

Forest extraction point cloud gridded

LIDAR waveform how is it created? Multiple return pulses are generated as the laser pulse hits various levels in the forest canopy, creating in total a complete return waveform Footprint Waveform measurement is a natural extension of the conventional discretereturn + intensity measurement process Return waveform is generated by all reflective surfaces within the laser footprint

Full Waveform Digitization (FWD) basic concept Laser Footprint Start Pulse Detector Signal T 1, I 1 T n, I n

Dual Leica Sensor System ADS40 ALS50 ( Estonian Land Board )

Dual Leica Sensor System ADS80 ALS60 ( SwissTopo )

Thank you