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Proceedings Paper • Open Access

The hyperspectral instrument onboard EnMAP: overview and current status
Author(s): Manuela Sornig; Sebastian Fischer; Christian Chlebek; Martin Muecke; Hans-Peter Honold; Brian Heider

Paper Abstract

The Environmental Mapping and Analysis Program (EnMAP) is a German spaceborne science mission that aims at characterizing the Earth’s environment on a global scale. The single payload of the satellite is the hyperspectral imager (HSI). It is capable of measuring the solar radiance reflected from the Earth’s surface as a continuous spectrum in the spectral range of 420nm to 2450nm, with a spectral sampling of 6.5nm (VNIR) and 10nm (SWIR). The EnMAP on ground swath of 30km is sampled with 30m.

The instrument features a telescope with a 18cm aperture. A double-slit splits the field of view into the two separate fields for VNIR and SWIR. Two spectrometers disperse the light using large, curved prisms and collect the light in an Offner configuration onto the VNIR and the SWIR detector. In addition, the instrument features calibration capabilities using a deployable, full aperture solar diffuser in front of the telescope and on-board calibration sources that can be fed into the spectrometers. The instruments demanding requirements on thermal stability are covered by an active thermal control of the whole instrument using loop-heat pipes.

In this proceeding, we give a short overview on the design, application and current integration status of the mission, which is currently in Phase D. The focus is on the important steps recently accomplished or currently ongoing, specific on the:
• completion of the telescope setup
• assembly of the spectrometers with the optical components of both spectrometer paths already in place, aligned and successfully characterized
• setup and characterization of the on-board calibration source OBCA
• integration of the calibration chain including the above mentioned OBCA into the spectrometer
• implementation of the first of the two front end devices, the VNIR camera and the SWIR camera
• assembly of the platform

The present situation suggests an EnMAP launch by the end of 2020.

Paper Details

Date Published: 12 July 2019
PDF: 10 pages
Proc. SPIE 11180, International Conference on Space Optics — ICSO 2018, 1118007 (12 July 2019);
Show Author Affiliations
Manuela Sornig, German Aerospace Ctr. (Germany)
Sebastian Fischer, German Aerospace Ctr. (Germany)
Christian Chlebek, German Aerospace Ctr. (Germany)
Martin Muecke, OHB System AG (Germany)
Hans-Peter Honold, OHB System AG (Germany)
Brian Heider, OHB System AG (Germany)


Published in SPIE Proceedings Vol. 11180:
International Conference on Space Optics — ICSO 2018
Zoran Sodnik; Nikos Karafolas; Bruno Cugny, Editor(s)

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