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Hecker C, Hook S, van der Meijde M, Bakker W, van der Werff H, Wilbrink H, van Ruitenbeek F, de Smeth B, van der Meer F. Thermal infrared spectrometer for Earth science remote sensing applications-instrument modifications and measurement procedures. SENSORS (BASEL, SWITZERLAND) 2011; 11:10981-99. [PMID: 22346683 PMCID: PMC3274325 DOI: 10.3390/s111110981] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2011] [Revised: 11/16/2011] [Accepted: 11/16/2011] [Indexed: 12/02/2022]
Abstract
In this article we describe a new instrumental setup at the University of Twente Faculty ITC with an optimized processing chain to measure absolute directional-hemispherical reflectance values of typical earth science samples in the 2.5 to 16 μm range. A Bruker Vertex 70 FTIR spectrometer was chosen as the base instrument. It was modified with an external integrating sphere with a 30 mm sampling port to allow measuring large, inhomogeneous samples and quantitatively compare the laboratory results to airborne and spaceborne remote sensing data. During the processing to directional-hemispherical reflectance values, a background radiation subtraction is performed, removing the effect of radiance not reflected from the sample itself on the detector. This provides more accurate reflectance values for low-reflecting samples. Repeat measurements taken over a 20 month period on a quartz sand standard show that the repeatability of the system is very high, with a standard deviation ranging between 0.001 and 0.006 reflectance units depending on wavelength. This high level of repeatability is achieved even after replacing optical components, re-aligning mirrors and placement of sample port reducers. Absolute reflectance values of measurements taken by the instrument here presented compare very favorably to measurements of other leading laboratories taken on identical sample standards.
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Affiliation(s)
- Christoph Hecker
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
| | - Simon Hook
- Earth Surface Science, Science Division, Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109, USA; E-Mail:
| | - Mark van der Meijde
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
| | - Wim Bakker
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
| | - Harald van der Werff
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
| | - Henk Wilbrink
- GeoScience Laboratory, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mail:
| | - Frank van Ruitenbeek
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
| | - Boudewijn de Smeth
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
- GeoScience Laboratory, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mail:
| | - Freek van der Meer
- Department of Earth Systems Analysis, Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, Hengelosestraat 99, P.O. Box 37, Enschede 7500AA, The Netherlands; E-Mails: (M.M.); (W.B.); (H.W.); (F.R.); (B.S.); (F.M.)
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Tornabene LL, Moersch JE, McSween HY, Hamilton VE, Piatek JL, Christensen PR. Surface and crater-exposed lithologic units of the Isidis Basin as mapped by coanalysis of THEMIS and TES derived data products. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007je002988] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Rogers AD, Christensen PR. Surface mineralogy of Martian low-albedo regions from MGS-TES data: Implications for upper crustal evolution and surface alteration. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006je002727] [Citation(s) in RCA: 166] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Glotch TD, Bandfield JL, Christensen PR, Calvin WM, McLennan SM, Clark BC, Rogers AD, Squyres SW. Mineralogy of the light-toned outcrop at Meridiani Planum as seen by the Miniature Thermal Emission Spectrometer and implications for its formation. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005je002672] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Timothy D. Glotch
- Division of Geological and Planetary Sciences; California Institute of Technology; Pasadena California USA
| | - Joshua L. Bandfield
- Department of Geological Sciences; Arizona State University; Tempe Arizona USA
| | | | - Wendy M. Calvin
- Department of Geological Sciences; University of Nevada; Reno Nevada USA
| | - Scott M. McLennan
- Department of Geosciences; State University of New York; Stony Brook New York USA
| | | | - A. Deanne Rogers
- Division of Geological and Planetary Sciences; California Institute of Technology; Pasadena California USA
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Michalski JR, Kraft MD, Sharp TG, Williams LB, Christensen PR. Emission spectroscopy of clay minerals and evidence for poorly crystalline aluminosilicates on Mars from Thermal Emission Spectrometer data. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005je002438] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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