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[57.09] SIR - 2: The NIR Spectrometer for the Chandrayaan-1 Mission

U. Mall, A. Nathues, H.U. Keller (Max-Planck-Institut fur Sonnensystemforschung), SIR-2 Science Team

SIR-2 is an upgraded, compact grating, near-infrared spectrometer, which covers the wave-length range between 0.9 and 2.45 \mum, with a spectral resolution of \Delta\lambda_pixel = 6 nm. SIR-2 has been chosen to fly on board the Indian mission Chandrayan-1 in 2007-2009. SIR-2, which will benefit from its heritage of SIR on SMART-1, will deliver, compared to SMART-1, a homogenous lunar surface coverage with unsurpassed spatial resolution and thus will greatly improve our knowledge of the lunar surface composition. The SIR-2 NIR data, combined with the hyperspectral data from the HySI instrument on Chandrayaan-1, will provide, for the first time, a full spectral coverage of the olivine and large part of the pyroxen bands, thus allowing one to extract from the data the necessary input parameters for the mineralogical mixing models. We present the SIR-2 design and discuss the potential science.

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Bulletin of the American Astronomical Society, 37 #3
© 2004. The American Astronomical Soceity.