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MRO/CRISM Retrieval of Surface Lambert Albedos for Multispectral Mapping of Mars With DISORT-Based Radiative Transfer Modeling: Phase 1—Using Historical Climatology for Temperatures, Aerosol Optical Depths, and Atmospheric Pressures

McGuire, Patrick C. and Ehlmann, Bethany L. (2008) MRO/CRISM Retrieval of Surface Lambert Albedos for Multispectral Mapping of Mars With DISORT-Based Radiative Transfer Modeling: Phase 1—Using Historical Climatology for Temperatures, Aerosol Optical Depths, and Atmospheric Pressures. IEEE Transactions on Geoscience and Remote Sensing, 46 (12). pp. 4020-4040. ISSN 0196-2892. https://resolver.caltech.edu/CaltechAUTHORS:20121012-112540658

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Abstract

We discuss the DISORT-based radiative transfer pipeline ("CRISM_LambertAlb") for atmospheric and thermal correction of MRO/CRISM data acquired in multispectral mapping mode (~200 m/pixel, 72 spectral channels). Currently, in this phase-one version of the system, we use aerosol optical depths, surface temperatures, and lower atmospheric temperatures, all from climatology derived from Mars Global Surveyor Thermal Emission Spectrometer (MGS-TES) data and from surface altimetry derived from MGS Mars Orbiter Laser Altimeter (MOLA). The DISORT-based model takes the dust and ice aerosol optical depths (scaled to the CRISM wavelength range), the surface pressures (computed from MOLA altimetry, MGS-TES lower atmospheric thermometry, and Viking-based pressure climatology), the surface temperatures, the reconstructed instrumental photometric angles, and the measured I/F spectrum as inputs, and then a Lambertian albedo spectrum is computed as the output. The Lambertian albedo spectrum is valuable geologically because it allows the mineralogical composition to be estimated. Here, I/F is defined as the ratio of the radiance measured by CRISM to the solar irradiance at Mars divided by π; if there was no martian atmosphere, I/F divided by the cosine of the incidence angle would be equal to the Lambert albedo for a Lambertian surface. After discussing the capabilities and limitations of the pipeline software system, we demonstrate its application on several multispectral data cubes-particularly, the outer reaches of the northern ice cap of Mars, the Tyrrhena Terra area that is northeast of the Hellas basin, and an area near the landing site for the Phoenix mission in the northern plains. For the icy spectra near the northern polar cap, aerosols need to be included in order to properly correct for the CO_2 absorption in the H_2O ice bands at wavelengths near 2.0 µm. In future phases of software development, we intend to use CRISM data directly in order to retrieve the spatiotemporal maps of aerosol optical depths, surface pressure, and surface temperature. This will allow a second level of refinement in the atmospheric and thermal correction of CRISM multispectral data.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1109/TGRS.2008.2000631 DOIArticle
http://arxiv.org/abs/0903.3687arXivDiscussion Paper
ORCID:
AuthorORCID
Ehlmann, Bethany L.0000-0002-2745-3240
Additional Information:© 2008 IEEE. Manuscript received October 4, 2007; revised March 25, 2008. Current version published November 26, 2008. This work was supported by the National Aeronautics and Space Administration (NASA) through the Applied Physics Laboratory under subcontract from the Jet Propulsion Laboratory through JPL Contract 1277793. The work of P. C. McGuire was supported by a Robert M. Walker Senior Research Fellowship from the McDonnell Center for the Space Sciences. The work of S. M. Wiseman was supported by a NASA Graduate Student Research Program fellowship. The work of T. N. Titus was supported in part by MRO Participating Scientist Award 1300367 and in part by the MGSTES and ODY/THEMIS projects. The work of T. Z. Martin, R. O. Green, and R. E. Milliken was supported by the MRO project. The authors would like to thank E. Guinness, T. Stein, L. Arvidson, S. Slavney, and M. Mueller for their assistance.
Funders:
Funding AgencyGrant Number
JPL1277793
Robert M. Walker Senior Research FellowshipUNSPECIFIED
NASA Graduate Student Research FellowshipUNSPECIFIED
NASA1300367
Subject Keywords:Atmospheric propagation; infrared spectroscopy; remote sensing; software verification and validation
Issue or Number:12
Record Number:CaltechAUTHORS:20121012-112540658
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20121012-112540658
Official Citation:McGuire, P.C.; Wolff, M.J.; Smith, M.D.; Arvidson, R.E.; Murchie, S.L.; Clancy, R.T.; Roush, T.L.; Cull, S.C.; Lichtenberg, K.A.; Wiseman, S.M.; Green, R.O.; Martin, T.Z.; Milliken, R.E.; Cavender, P.J.; Humm, D.C.; Seelos, F.P.; Seelos, K.D.; Taylor, H.W.; Ehlmann, B.L.; Mustard, J.F.; Pelkey, S.M.; Titus, T.N.; Hash, C.D.; Malaret, E.R.; , "MRO/CRISM Retrieval of Surface Lambert Albedos for Multispectral Mapping of Mars With DISORT-Based Radiative Transfer Modeling: Phase 1—Using Historical Climatology for Temperatures, Aerosol Optical Depths, and Atmospheric Pressures," Geoscience and Remote Sensing, IEEE Transactions on , vol.46, no.12, pp.4020-4040, Dec. 2008 doi: 10.1109/TGRS.2008.2000631 URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4685531&isnumber=4683335
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:34873
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:12 Oct 2012 18:38
Last Modified:06 Nov 2020 16:56

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