Multi-wavelength Ocean Profiling and Atmospheric Lidar

Metadata Updated: August 1, 2018

We propose to build and demonstrate the world's first multi-wavelength ocean-profiling high spectral resolution lidar (HSRL). The lidar will provide profiles of plankton backscatter (bbp) and diffuse attenuation coefficient (Kd) at two wavelengths, 355 and 532 nm, via the HSRL technique. As part of this effort, we will advance the TRL of key instrument component technologies to lower the development time, risk, and cost of a future satellite instrument. We will develop high speed detection electronics to sample the ocean profile at 1 m vertical resolution, develop an advanced data acquisition and control system employing intelligent FPGA signal preprocessing and averaging, and demonstrate a novel, quasi-monolithic interferometer implementing the HSRL optical filter at 355 nm. We will also explore technologies to attenuate pernicious signal spikes from specular reflection of the laser from the ocean surface. These surface reflection spikes are a significant source of signal artifacts in ocean subsurface lidar signals, and we will implement the following technologies to reduce these surface spikes: (1) fast photo-multiplier tube (PMT) gating circuits that will reduce PMT gain for the duration of the surface spike, (2) new hybrid detectors that have improved immunity to after-pulsing common to PMTs, and (3) application of Pockels cells in the receiver to optically attenuate the surface reflectance. We will integrate the most promising of these technologies along with the new instrument controller and interferometer into a new receiver for the existing HSRL-2 instrument and characterize the performance of the new instrument in ground and flight tests. We exit the project with an operational ocean-optimized multi-wavelength HSRL instrument that will serve as an airborne prototype for a future space-based instrument. In addition to key new ocean remote sensing capability, the instrument will provide the atmospheric aerosol products called for by the Aerosol-Clouds-Ecosystems mission of the Decadal Survey.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date August 1, 2018
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_15099
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id 458b1a94-0ec9-4b26-809c-2b82791a9440
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2017-08-01T07:00:00.000Z
Homepage URL
Language en-US
Data Last Modified 2018-01-25T00:00:00.000Z
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Source Datajson Identifier True
Source Hash 2575b7cbf059f23ae69bd061507e3837513f5089
Source Schema Version 1.1

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