First Results from Laser-Based Spectral Characterization of Landsat 9 Operational Land Imager-2

McCorkel, Joel ; McAndrew, Brendan ; Barsi, Julia ; Markham, Brian ; Pharr, James ; Rodriguez, Michael ; Shuman, Tim ; Sushkov, Andrei ; Zukowski, Barbara

关键词: LANDSAT SATELLITES;    LANDSAT 9;    LASERS;    SPECTRAL SENSITIVITY;    SPECTRUM ANALYSIS;    INFRARED DETECTORS;    CHARACTERIZATION;    CALIBRATING;   

RP-ID  :  GSFC-E-DAA-TN71921

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来源: NASA Technical Reports Server

【 摘 要 】

Landsat 9 will continue the Landsat data record into its fifth decade with launch scheduled for December 2020. The two instruments on Landsat 9 are Thermal Infrared Sensor-2 (TIRS-2) and Operational Land Imager-2 (OLI-2). OLI-2 is a nine-channel pushbroom imager with a 15-degree field of view that will have a 16-day measurement cadence from its nominal 705-km orbit altitude. A key aspect of the data that will be produced by OLI-2 is its spectral fidelity which enables countless science applications. The prelaunch test campaign for spectral characterization of OLI-2 was substantially improved relative to the methodology used for OLI: the full spectral response of every detector was characterized with greater accuracy, sampling, and precision. This paper will describe how this was accomplished with a tunable laser-based light source called Goddard Laser for Absolute Measurement of Radiance (GLAMR).