Have you ever wanted to know how LiDAR helps us uncover hidden cities in dense jungles? In this blog, I want to explain how LIDAR works to reveal lost cities buried beneath the lush canopy of the jungle. The Challenge of Dense Jungles Jungles are places of lush vegetation, thick undergrowth, and...
exploreralbert.com
Not sure how quickly you get decent imagery by LIDAR.
In the Phase III Jigsaw airborne lidar foliage penetration tests, a goal of the project which the system met was "
process the 3D ladar data on-board and send the data to the ground observer to enable target detection and ID in near real time." Unfortunately, the paper about the system and the tests to which I previously provided a link does not specify the data collection times nor the near real time delay from data collection to 3D image display and target detection and ID.
I was a government evaluator of the Jigsaw system and attended the flight tests described in the paper. My recollection is that the sorties took several minutes to complete, but during each sortie, the lidar data was downloaded to the ground station, processed, and displayed within a few seconds delay as the data was collected during the flight, so we saw the 3D image of the area scanned built up as the helicopter flew over the area. Targets were detected and identified, and their 3D images were displayed within a few seconds after being scanned during the flight.
The Jigsaw Phase III tests took place in about 2005/2006. A more recent system that evolved from Jigsaw is MIT Lincoln Lab's PHOENIX High CASTLE:
https://www.ll.mit.edu/r-d/projects/phoenix-high-castle :
"The high-resolution and high-area-coverage-rate 3D imagery provided by these ladar systems are well suited to geospatial mapping missions—for example,
wide-area (hundreds of square kilometers per hour) mapping of desert, jungle, and urban terrain and
foliage-penetration imaging of terrain obscured by dense tree canopy...The latest ladar system we developed is the PHOton Exploration and Novel Imaging eXperiments (PHOENIX) High-altitude Collaborative Airborne System for Tactical Lidar Experimentation (High CASTLE)...During a flight campaign conducted in Virginia from June through August 2021, we demonstrated PHOENIX High CASTLE. In more than 200 passes flown over 13 unique geographic locations across seven sorties, we generated eight terabytes of very high-resolution ladar data...A second flight campaign is planned for summer 2023."
The typical specs./requirements for automotive lidars usually include operation at 3D image rates of about 5 Hz to 30 Hz, which includes during operation in degraded atmospheres, in order to provide real time navigation, obstacle avoidance, and collision avoidance.
www.geographyrealm.com
www.frontiersin.org
www.mdpi.com
boeing.mediaroom.com
