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Proceedings Paper

Landsat 9 OLI 2 focal plane subsystem: design, performance, and status
Author(s): Kevin J. Malone; Ronald J. Schrein; M. Scott Bradley; Ronda Irwin; Barry Berdanier; Eric Donley
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Paper Abstract

The Landsat 9 mission will continue the legacy of Earth remote sensing that started in 1972. The Operational Land Imager 2 (OLI 2) is one of two instruments on the Landsat 9 satellite. The OLI 2 instrument is essentially a copy of the OLI instrument flying on Landsat 8. A key element of the OLI 2 instrument is the focal plane subsystem, or FPS, which consists of the focal plane array (FPA), the focal plane electronics (FPE) box, and low-thermal conductivity cables. This paper presents design details of the OLI 2 FPS. The FPA contains 14 critically-aligned focal plane modules (FPM). Each module contains 6 visible/near-IR (VNIR) detector arrays and three short-wave infrared (SWIR) arrays. A complex multi-spectral optical filter is contained in each module. Redundant pixels for each array provide exceptional operability. Spare detector modules from OLI were recharacterized after six years of storage. Radiometric test results are presented and compared with data recorded in 2010. Thermal, optical, mechanical and structural features of the FPA will be described. Special attention is paid to the thermal design of the FPA since thermal stability is crucial to ensuring low-noise and low-drift operation of the detectors which operate at -63°C. The OLI 2 FPE provides power, timing, and control to the focal plane modules. It also digitizes the video data and formats it for the solid-state recorder. Design improvements to the FPA-FPE cables will be discussed and characterization data will be presented. The paper will conclude with the status of the flight hardware assembly and testing.

Paper Details

Date Published: 5 September 2017
PDF: 21 pages
Proc. SPIE 10402, Earth Observing Systems XXII, 1040206 (5 September 2017); doi: 10.1117/12.2273058
Show Author Affiliations
Kevin J. Malone, Ball Aerospace & Technologies Corp. (United States)
Ronald J. Schrein, Ball Aerospace & Technologies Corp. (United States)
M. Scott Bradley, Ball Aerospace & Technologies Corp. (United States)
Ronda Irwin, Ball Aerospace & Technologies Corp. (United States)
Barry Berdanier, Ball Aerospace & Technologies Corp. (United States)
Eric Donley, Ball Aerospace & Technologies Corp. (United States)

Published in SPIE Proceedings Vol. 10402:
Earth Observing Systems XXII
James J. Butler; Xiaoxiong (Jack) Xiong; Xingfa Gu, Editor(s)

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