Title :
Preflight and In-Flight Calibration of the Spectral Profiler on Board SELENE (Kaguya)
Author :
Yamamoto, Satoru ; Matsunaga, Tsuneo ; Ogawa, Yoshiko ; Nakamura, Ryosuke ; Yokota, Yasuhiro ; Ohtake, Makiko ; Haruyama, Junichi ; Morota, Tomokatsu ; Honda, Chikatoshi ; Hiroi, Takahiro ; Kodama, Shinsuke
Author_Institution :
Center for Global Environ. Res., Nat. Inst. for Environ. Studies, Tsukuba, Japan
Abstract :
The Spectral Profiler (SP) is a visible-near infrared spectrometer on board the Japanese Selenological and Engineering Explorer, which was launched in 2007 and observed the Moon 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 (1.7-2.6 μm). In this paper, we characterize the radiometric and spectral properties of VIS and NIR 1 using in-flight observational data as well as preflight data derived in laboratory experiments using a calibrated integrating sphere. We also proposed new methods for radiometric calibration, specifically methods for nonlinearity correction, wavelength correction, and the correction of the radiometric calibration coefficients affected by the water vapor. After all the corrections, including the photometric correction, we obtained the reflectance spectra for the lunar surface. Finally, we examined the stability of the SP using the SP data near the Apollo 16 landing site observed at four different times. The difference in reflectance among these four observations was less than ~ ±1% for most of the bands, suggesting that the degradation of the SP is not significant over the mission period.
Keywords :
aerospace instrumentation; calibration; infrared spectrometers; lunar surface; photometry; planetary remote sensing; radiometry; Apollo 16 landing site; Japanese Selenological and Engineering Explorer; Moon; SELENE; SP data; calibrated integrating sphere; linear-array detectors; lunar surface; mission period; nonlinearity correction; photometric correction; preflight data; radiometric calibration coefficients; radiometric properties; reflectance spectra; spectral profiler; spectral properties; visible-near infrared spectrometer; wavelength correction; Calibration; Detectors; Instruments; Moon; Optical surface waves; Pixel; Radiometry; Infrared spectroscopy; Moon; remote sensing; spectral analysis; spectroscopy;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.2011.2144990