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29 juin 2018 Tout le mois

Etienne le Coarer (Univ Grenoble-Alpes) - ImSPOC : a miniaturized imaging spectrometer at the service of the climate

Vendredi 29 juin 2018 11:00-12:00

The ImSPOC (Imaging Spectrometer On Chip) concept is a miniaturization of spectroimagents in the line of
the school of Georges Courtès. Performance does not have to suffer from miniaturization but on the contrary allows
to better specialize them for very different uses. An example is the spectrometer at the origin of NanoCarb.

NanoCarb is a miniaturized space mission for the measurement of major greenhouse gases. It is built around an innovative concept of compact and static Fourier transform imaging spectrometer, developed between ONERA and IPAG these last years [Patent n ° 16 56162, of June 30th, 2016]. The principle is based on a matrix of Fabry-Perot interferometers coupled to an infrared detector, allowing the recording in an image of the spatial and spectral information, without moving elements, for a class of instrument of the order of one kilogram (temperature regulation included ). The objective of the NanoCarb mission is to measure the integrated CO2 on the density column with a statistical error better than 1 ppm, for a spatial resolution of 3km on the ground over 150 km swath. A European funding (H2020 "SCARBO", Space CARBon Observatory) under Airbus Defense & Space aims to study the feasibility of a hybrid constellation based on NanoCarb nano-satellites coupled to a reference mission such as MicroCarb, with the aim of deliver global and daily CO2 emission maps. As part of this project, we are conducting a study with ONERA on the sizing of the instrument and then on the evaluation of its performance. A prototype will then be produced and will be the subject of an airborne measurement campaign after validation tests in the laboratory.

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