TMAP: designing a thermal infrared multi-spectral imager for an Io mission

J. Helbert; A. Maturilli; Ingo Walter; Thomas Säuberlich; Martin Pertenais; Jörg Knollenberg; Gisbert Peter; Matthias Grott

doi:10.1117/12.2634262

30 September 2022 TMAP: designing a thermal infrared multi-spectral imager for an Io mission

J. Helbert, A. Maturilli, Ingo Walter, Thomas Säuberlich, Martin Pertenais, Jörg Knollenberg, Gisbert Peter, Matthias Grott

Author Affiliations +

Proceedings Volume 12233, Infrared Remote Sensing and Instrumentation XXX; 1223301 (2022) https://doi.org/10.1117/12.2634262
Event: SPIE Optical Engineering + Applications, 2022, San Diego, California, United States

Abstract

TMAP is a high spatial resolution thermal imager, optimized for observing Io, derived from BepiColombo’s Mercury Radiometer and Thermal Infrared Spectrometer (MERTIS). TMAP has three detectors with a beam split at image plane level: a multispectral imager using an uncooled microbolometer and two radiometer line detectors provide greater precision than the imager for background temperatures (80–150 K) as well as a precise temperatures measurement of active lava flows at 2μm. The TMAP microbolometer and radiometer operate primarily in a pushbroom imaging configuration. The optical design of TMAP is simplified from MERTIS, replacing the spectrometer with simple stripe filters on the microbolometer. Minor modifications of the three-mirror anastigmat (TMA) telescope optics and updating the microbolometer improve the spatial resolution by over 5x. TMAP has a fully reflective, gold-coated F/2.5 TMA optical path with 135-mm focal length. A flip-panel in the optical path between the detectors and mirror 3 serves as a calibration target and follows the standard design used in a wide range of flight instruments. TMAP will measure thermal infrared emission of SO2-free areas of silicate to characterize spectral shape and locate the Christiansen feature emissivity maximum with 8 stripe filters spanning 4.5–16 μm. TMAP will classify eruptions over a significant portion of Io using a 2μm filter on the radiometer and two 5μm bands of the bolometer. TMAP will measure the surface radiance both with the microbolometer between 5 and 16 μm and with the radiometer at wavelength ≥18μm.

Citation Download Citation

J. Helbert, A. Maturilli, Ingo Walter, Thomas Säuberlich, Martin Pertenais, Jörg Knollenberg, Gisbert Peter, and Matthias Grott "TMAP: designing a thermal infrared multi-spectral imager for an Io mission", Proc. SPIE 12233, Infrared Remote Sensing and Instrumentation XXX, 1223301 (30 September 2022); https://doi.org/10.1117/12.2634262

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
12 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Radiometry

Sensors

Information operations

Calibration

Bolometers

Microbolometers

Thermography

Show All Keywords

Keywords/Phrases

Search In:

Publication Years