LED Spectrometer (LSpec) autonomous vicarious calibration facility

Mark C. Helmlinger; Carol J. Bruegge; Ethan H. Lubka; Harry N. Gross

doi:10.1117/12.730955

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27 September 2007 LED Spectrometer (LSpec) autonomous vicarious calibration facility

Mark C. Helmlinger, Carol J. Bruegge, Ethan H. Lubka, Harry N. Gross

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Proceedings Volume 6677, Earth Observing Systems XII; 66770V (2007) https://doi.org/10.1117/12.730955
Event: Optical Engineering + Applications, 2007, San Diego, California, United States

Abstract

A new method of performing vicarious calibration of Visible-Near Infrared (VNIR) sensors has been developed which does not require the manual efforts of a field team to capture surface and atmospheric measurements. Instead, an array of unattended sensors captures the required data on a near continuous basis for recording to a web-based retrieval system. The LSpec (LED Spectrometer) facility, located at Frenchman Flat at the Nevada Test Site, began initial operations in November 2006. The LSpec sensors measure surface reflectance at several VNIR bands, and the accompanying atmospheric measurements allow the production of top-of-atmosphere radiance estimates to calibrate space-borne sensor products. Data are distributed via the Internet, and are available to the calibration community. This paper describes the test site, web-access to the data, and makes use of these data to compute top-of-atmosphere radiance (TOA) and compare to those from the Multi-angle Imaging SpectroRadiometer (MISR) imagery.

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Mark C. Helmlinger, Carol J. Bruegge, Ethan H. Lubka, and Harry N. Gross "LED Spectrometer (LSpec) autonomous vicarious calibration facility", Proc. SPIE 6677, Earth Observing Systems XII, 66770V (27 September 2007); https://doi.org/10.1117/12.730955

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