The Jovian infrared auroral observations. An appropriate Echelle grating is selected to optimize at 3.9 micron and 2.1 micron for Target of ESPRIT is to measure the Jovian H3+ fundamental line at 3.9 micron, and H2 nu=1 at 2.1 micron. We are developing anĮchelle spectrograph called ESPRIT: Echelle Spectrograph for Planetary Research In Tohoku university. Infrared spectrometer provide the good opportunity to investigate these objects continuously. A compact and easy-to-use high resolution Volcanoes on Jovian satellite Io, to understand its time and spatial variations. It isĮssential to carry out continuous measurement of planetary atmosphere, such as the Jovian infrared aurora and the Spectrometer around 10 micron installed on the 60-cm telescope at the summit of Haleakala, Hawaii (alt.=3000m). We report the development of infrared Echelle spectrograph covering 1 - 4 micron and mid-infrared heterodyne
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