Instrument for Airborne Measurement of Carbonyl Sulfide, Phase II

Metadata Updated: November 12, 2020

In this Phase II SBIR program, Southwest Sciences will continue the development of small, low power instrumentation for real-time direct measurement of carbonyl sulfide (OCS) in the atmosphere, especially targeting airborne measurements. The instrument is based on a room temperature interband cascade laser (ICL) operating in the 4800 - 4900 nm region. This laser has a substantially reduced (by a factor of 40) power requirement compared to quantum cascade lasers operating in the same region and should be better-suited for atmospheric field instruments. Phase I concentrated on characterizing the sensitivity and precision that can be achieved for OCS measurement, using this laser in a laboratory prototype. Phase I also demonstrated direct measurement of ambient carbonyl sulfide in the local outside air, at levels of about 450 parts per trillion. Phase II emphasizes development of an airborne-worthy prototype instrument that can be field tested during the Phase II performance period. Carbonyl sulfide is the most abundant naturally occurring sulfur species in the atmosphere. The lifetime of OCS in the troposphere is believed to be several years, allowing its transport into the lower stratosphere where it is photochemically oxidized to sulfate particles. Improved understanding of the tropospheric - stratospheric exchange of OCS is needed to gain a better understanding of its role in sulfate particle production. In turn, the sulfate aerosol layer may significantly influence the earth's energy budget through increased solar scattering. Existing instrumentation for measurement of OCS is bulky and expensive and is complicated by several indirect steps. In contrast, this R&D effort will result in an instrument that measures OCS directly, in real time, with time response of a few seconds or better. At the conclusion of Phase II, Southwest Sciences will manufacture and sell commercial instruments for OCS measurement to NASA and the broader atmospheric research community.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date November 12, 2020
Metadata Updated Date November 12, 2020
Publisher Space Technology Mission Directorate
Unique Identifier Unknown
Identifier TECHPORT_90429
Data First Published 2018-04-01
Data Last Modified 2020-01-29
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Homepage URL
Program Code 026:027
Source Datajson Identifier True
Source Hash 9477a7de32eda52a5151952bd811ae7093167cdd
Source Schema Version 1.1

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