Accession Number : ADA537860


Title :   Calibration Against the Moon. I: A Disk-Resolved Lunar Model for Absolute Reflectance Calibration


Descriptive Note : Journal article


Corporate Author : ATMOSPHERIC AND ENVIRONMENTAL RESEARCH INC LEXINGTON MA


Personal Author(s) : Kennelly, Edward J ; Price, Stephan D ; Kraemer, Kathleen E ; Aschbrenner, Ryan


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a537860.pdf


Report Date : Jan 2010


Pagination or Media Count : 28


Abstract : We present a model of the absolute radiance of the disk-resolved Moon at visible to near infrared wavelengths. It has been developed in order to use the Moon as a calibration reference, particularly by space-based sensors observing the Earth. We begin with the development of Hillier et al. (Hillier, J., Buratti, B., Hill, K.[1999]. Icarus 141, 205-225) for the reflectance as a function of phase angle and base the lunar reflectance on the Clementine 0.750 mum basemap. We adopt Hapke's (Hapke, B. [2002], Icarus 157. 523-534) expression for the multiple scattering term, including the more accurate approximation to the Chandrasekhar H function. The geometry is based on the Jet Propulsion Laboratory Lunar Ephemeris DE421, and the topographic slope is from the Kaguya-LALT laser altimetry (Araki, II., and 10 colleagues [2009]. Science 323, 897-900). We define three types of terrain by combining the reflectance from the Clementine basemap and the topographic model to specify maria, highlands, and crater regions, and allow mixed types between each class. Parameters of the model are solved for as a function of surface type and wavelength by comparison against data chips from the Robotic Lunar Observatory (ROLO; Kieffer, II. II.. Stone. T. C. [2005]. Astron J. 129, 2887-2901). The reflectance in any waveband maybe computed by spectral interpolation of the model predictions relative to the scaled Apollo 16 soil spectrum. The accuracy of the model, evaluated against ROLO imagery, was found to be 2-4%.


Descriptors :   *CALIBRATION , *MOON , INTERPOLATION , LUNAR ENVIRONMENTS , REFLECTANCE , RADIANCE , REPRINTS


Subject Categories : Astronomy


Distribution Statement : APPROVED FOR PUBLIC RELEASE