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Updated: Jul 6, 2026
09:19
Measuring the Structure, Composition, and Change of Underwater Environments with Large-area Imaging
Published on: April 18, 2025
Next-Generation NASA Airborne Oceanographic Lidar System
Applied Optics
|March 22, 2008
Summary
The new Airborne Oceanographic Lidar (AOL-3) uses advanced technology for smaller size and less power. It achieves comparable accuracy, enabling simultaneous dual-wavelength measurements of oceanographic targets.
Area of Science:
- Oceanography
- Remote Sensing
- Optical Engineering
Background:
- Previous Airborne Oceanographic Lidar (AOL) sensors required significant weight, volume, and power.
- Technological advancements necessitate updated lidar systems for improved efficiency and capability.
Purpose of the Study:
- To detail the design and flight test of the next-generation Airborne Oceanographic Lidar (AOL-3).
- To demonstrate significant reductions in size, weight, and power requirements through new technologies.
- To introduce simultaneous dual-wavelength excitation for enhanced oceanic target analysis.
Main Methods:
- Subsystem design incorporating fiber optics, advanced spectrometer detectors, miniature photomultiplier modules, and a novel receiver optical configuration.
- Implementation of a single laser source for simultaneous dual-wavelength (532 nm and 355 nm) excitation of separate oceanic targets.
- Simultaneous acquisition of backscattered fluorescence and Raman signals using a shared telescope and spectrometer-detector system, with data recorded by digital oscilloscopes.
Main Results:
- The AOL-3 design achieved substantial reductions in weight, volume, and power consumption compared to earlier AOL sensors.
- The new system maintained comparable measurement accuracy while reducing telescope size.
- Simultaneous, dual-wavelength excitation and data acquisition from two distinct oceanic targets were successfully demonstrated.
Conclusions:
- The next-generation Airborne Oceanographic Lidar (AOL-3) represents a significant advancement in oceanographic remote sensing technology.
- The redesigned system offers enhanced efficiency and novel measurement capabilities, including simultaneous dual-wavelength analysis.
- AOL-3 provides accurate, depth-resolved spectral data, paving the way for more comprehensive oceanic studies.
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