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Proceedings Paper

Preliminary on-orbit performance of the Thermal Infrared Sensor (TIRS) on board Landsat 8
Author(s): Matthew Montanaro; Zelalem Tesfaye; Allen Lunsford; Brian Wenny; Dennis Reuter; Brian Markham; Ramsey Smith; Kurtis Thome
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Paper Abstract

The Thermal Infrared Sensor (TIRS) on board Landsat 8 continues thermal band measurements of the Earth for the Landsat program. TIRS improves on previous Landsat designs by making use of a pushbroom sensor layout to collect data from the Earth in two spectral channels. The radiometric performance requirements of each detector were set to ensure the proper radiometric integrity of the instrument. The performance of TIRS was characterized during pre-flight thermal-vacuum testing. Calibration methods and algorithms were developed to translate the raw signal from the detectors into an accurate at-aperture spectral radiance. The TIRS instrument has the ability to view an on-board variable-temperature blackbody and a deep space view port for calibration purposes while operating on-orbit.

After TIRS was successfully activated on-orbit, checks were performed on the instrument data to determine its image quality. These checkouts included an assessment of the on-board blackbody and deep space views as well as normal Earth scene collects. The calibration parameters that were determined pre-launch were updated by utilizing data from these preliminary on-orbit assessments. The TIRS on-orbit radiometric performance was then characterized using the updated calibration parameters. Although the characterization of the instrument is continually assessed over the lifetime of the mission, the preliminary results indicate that TIRS is meeting the noise and stability requirements while the pixel-to-pixel uniformity performance and the absolute radiometric performance require further study.

Paper Details

Date Published: 23 September 2013
PDF: 14 pages
Proc. SPIE 8866, Earth Observing Systems XVIII, 88661D (23 September 2013); doi: 10.1117/12.2025650
Show Author Affiliations
Matthew Montanaro, Sigma Space Corp. (United States)
Zelalem Tesfaye, Millennium Engineering and Integration Co. (United States)
Allen Lunsford, Catholic Univ. of America (United States)
Brian Wenny, Sigma Space Corp. (United States)
Dennis Reuter, NASA Goddard Space Flight Ctr. (United States)
Brian Markham, NASA Goddard Space Flight Ctr. (United States)
Ramsey Smith, NASA Goddard Space Flight Ctr. (United States)
Kurtis Thome, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8866:
Earth Observing Systems XVIII
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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