Preflight and In-Flight Calibration of the Spectral Profiler on Board
4660 IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 49, NO. 11, NOVEMBER 2011 Preflight and In-Flight Calibration of the Spectral Profiler on Board SELENE (Kaguya) Satoru Yamamoto, Tsuneo Matsunaga, Yoshiko Ogawa, Ryosuke Nakamura, Yasuhiro Yokota, Makiko Ohtake, Junichi Haruyama, Tomokatsu Morota, Chikatoshi Honda, Takahiro Hiroi, and Shinsuke Kodama Abstract—The Spectral Profiler (SP) is a visible–near infrared continuous spectral reflectance data for more than 68 million spectrometer on board the Japanese Selenological and Engineer- points on the Moon. ing Explorer, which was launched in 2007 and observed the Moon The SP is designed to clarify the global distribution of until June 2009. The SP consists of two gratings and three linear- array detectors: VIS (0.5–1.0 µm), NIR 1 (0.9–1.7 µm), and NIR 2 mineral composition on the surface of the Moon, which is (1.7–2.6 µm). In this paper, we characterize the radiometric and thought to be a key factor in revealing the overall composition spectral properties of VIS and NIR 1 using in-flight observational and the evolution of the lunar crust and mantle [3], [5], [6]. data as well as preflight data derived in laboratory experiments For the identification of mineral composition from spectral using a calibrated integrating sphere. We also proposed new meth- reflectance data, it is important to characterize the behavior of ods for radiometric calibration, specifically methods for nonlin- earity correction, wavelength correction, and the correction of the the instruments used based on both preflight experiments and radiometric calibration coefficients affected by the water vapor.
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