An optical scanning subsystem for a UAS-enabled hyperspectral radiometer

Metadata Updated: May 2, 2019

Hyperspectral radiometers will be integrated with an optical scanning subsystem to measure remote sensing reflectance spectra over the ocean.[HTML_REMOVED] The entire scanning radiometer system will be integrated into an unmanned aircraft system (UAS) to allow for remote sensing and for support of real time validation opportunities. [HTML_REMOVED]Maps of hyperspectral imagery will be telemetered to a data visualization application for monitoring the progress of UAS surveys. A hyperspectral visible radiometer instrument system has been developed for use on UAS platforms.[HTML_REMOVED] It has been successfully flown on three previous UAS field campaigns, and recently integrated for flight on board MIZOPEX a fourth.[HTML_REMOVED] In all of these experiments, the radiometer was configured in a fixed-look scan angle mode that allowed for observing along a single fixed track, and the science data were recorded internally on board the UAS and only made available upon the successful return of the UAS and its payload.[HTML_REMOVED] The focus of this project is to expand upon the present UAS capability for observing hyperspectral reflectance spectra.[HTML_REMOVED] By integrating a scanning subsystem and a remote telemetry capability, we will enable science investigator(s) to modify the scanning configuration in order to optimize the science data collection in a specific region in the cross-track domain.A hyperspectral radiometer instrumentation will be integrated into a scanning subsystem in order to allow the radiometer to scan across a range of angles as the UAV progresses along in its survey. [HTML_REMOVED]The configuration will consist of a series of lower spectral resolution radiometers that will be set to cross-track scan angles, a higher spectral resolution radiometer with a cosine collector set to zenith for measuring the downward radiance spectra, and a second higher resolution radiometer mounted to a servo motor for scanning along a cross-track scan angle that can either be preset or controlled remotely. [HTML_REMOVED]Real time spectral observations will be downscaled to send the spectra to a downlink computer in near real time.[HTML_REMOVED] These observations would then be available for re-tasking the scanning component of the radiometer.The ability to collect reflectance spectra of the ocean surface in real time can help scientists optimize their data collection strategies.[HTML_REMOVED] Optimization of data collection has become a growing area of research, especially for scienctists who are faced with collecting science data in a regions that have small space and time scales of variability.[HTML_REMOVED] This problem is also one of concern for UAS-enabled science instruments that would prefer to set their observational focus as a function of the observed spatial variability, allowing more observations to be collected along features of interest and less within areas that show little variability.[HTML_REMOVED] Such observing strategies lend well to 2D spatial mapping algorithms such as optimal interpolation.The present radiometer instruments and software is easily portable to a system configured with multiple radiometers.[HTML_REMOVED] The two major technical aspects of this project will be in regard to the control of the pointing system and with the real time data telemetry link.

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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 May 2, 2019

Metadata Source

Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_14538
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id 3e74d781-d67b-43cd-ab65-84dfc33bcd6c
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2014-09-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 0cf5f84faec3a49e33bc4d7d8c0c1af8a7aa22c7
Source Schema Version 1.1

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