MERTIS (MErcury Radiometer and Thermal infrared Imaging Spectrometer) is part of ESA's BepiColombo Mercury Planetary Orbiter mission to the innermost planet of the Solar system. MERTIS is designed to identify rock-forming minerals, to map the surface composition, and to study the surface temperature variations with an uncooled microbolometer detector in the hot environment of Mercury. MERTIS is an advanced IR instrument combining a pushbroom IR grating spectrometer (TIS) with a radiometer (TIR) sharing the same optics, instrument electronics and in-fight calibration components for a wavelength range of 7-14 and 7-40 μm, respectively. First results of the ongoing MESSENGER project at Mercury have shown a more complex geology and higher variability of features than previously thought. The MESSENGER studies have demonstrated the need to gain global high-resolution mid-IR spectral and temperature data to achieve a better understanding of the planetary genesis. The MERTIS measurements will acquire this currently missing data set. This article gives a summary of the instrument requirements and its design. We are reporting on the actual instrument development progress, and the status of system and subsystem qualification efforts.

Date Published: 28 August 2010
PDF: 10 pages
Proc. SPIE 7808, Infrared Remote Sensing and Instrumentation XVIII, 78080I (28 August 2010); doi: 10.1117/12.860144

Published in SPIE Proceedings Vol. 7808:
Infrared Remote Sensing and Instrumentation XVIII
Marija Strojnik; Gonzalo Paez, Editor(s)