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Proceedings Paper

The Operational Land Imager-2: prelaunch spectral characterization
Author(s): Julia A. Barsi; Brian L. Markham; Joel McCorkel; Brendan McAndrew; Eric Donley; Eric Morland; James Pharr; Michael Rodriguez; Tim Shuman; Andrei Sushkov; Barbara Zukowski
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Paper Abstract

The Landsat-9 satellite will carry the Operational Land Imager-2 (OLI-2) as one of its payloads. This instrument is a clone of the Landsat-8 OLI and its mission is to continue the operational land imaging of the Landsat program. The OLI-2 will continue to populate an archive of Landsat earth images that dates back to 1972. The OLI-2 instrument is not significantly different from OLI though the instrument-level pre-launch spectral characterization process was much improved. While OLI was characterized by a double monochromator system, the OLI2 spectral characterization made use of the Goddard Laser for Absolute Measurement of Radiance (GLAMR), a system of tunable lasers that cover 350-2500nm which are fiber-coupled to a 30-in integrating sphere and is monitored by NISTtraceable radiometers. GLAMR allowed the spectral characterization of every detector of the OLI-2 focal plane in nominal imaging conditions. The in-band relative spectral responses were sampled at 1 or 2nm wavelength increments and the out-of-band responses at 10 or 20nm wavelength increments (increment is dependent on spectral band/region). The final relative spectral responses (RSRs) represent the best characterization any Landsat instrument spectral response. This paper will cover the results of the instrument-level spectral characterization, including in-band response, out-of-band response, spectral cross-talk and spectral uniformity.

Paper Details

Date Published: 9 September 2019
PDF: 11 pages
Proc. SPIE 11127, Earth Observing Systems XXIV, 111270B (9 September 2019); doi: 10.1117/12.2529776
Show Author Affiliations
Julia A. Barsi, NASA Goddard Space Flight Ctr. (United States)
Brian L. Markham, NASA Goddard Space Flight Ctr. (United States)
Joel McCorkel, NASA Goddard Space Flight Ctr. (United States)
Brendan McAndrew, NASA Goddard Space Flight Ctr. (United States)
Eric Donley, Ball Aerospace and Technologies (United States)
Eric Morland, Ball Aerospace and Technologies (United States)
James Pharr, a.i. solutions, Inc. (United States)
Michael Rodriguez, Hexagon US Federal (United States)
Tim Shuman, Fibertek, Inc (United States)
Andrei Sushkov, Genesis Engineering Solutions, Inc. (United States)
Barbara Zukowski, Ball Aerospace and Technologies (United States)

Published in SPIE Proceedings Vol. 11127:
Earth Observing Systems XXIV
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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