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

Helbert, Jörn and Maturilli, Alessandro and Walter, Ingo and Säuberlich, Thomas and Pertenais, Martin and Knollenberg, Jörg and Peter, Gisbert and Grott, Matthias (2022) TMAP: designing a thermal infrared multi-spectral imager for an Io mission. In: Infrared Remote Sensing and Instrumentation XXX 2022, 12233, p. 1223301. SPIE - Society of Photo-optical Instrumentation Engineers. SPIE Optical Engineering + Applications, San Diego, USA. doi: 10.1117/12.2634262. ISBN 978-1-5106 5450-1. ISSN 0277-786X.

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Official URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12233/2634262/TMAP--designing-a-thermal-infrared-multi-spectral-imager-for/10.1117/12.2634262.full

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.

Item URL in elib:https://elib.dlr.de/191322/
Document Type:Conference or Workshop Item (Speech)
Title:TMAP: designing a thermal infrared multi-spectral imager for an Io mission
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Helbert, JörnUNSPECIFIEDhttps://orcid.org/0000-0001-5346-9505UNSPECIFIED
Maturilli, AlessandroUNSPECIFIEDhttps://orcid.org/0000-0003-4613-9799UNSPECIFIED
Walter, IngoUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Säuberlich, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pertenais, MartinUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Knollenberg, JörgUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Peter, GisbertUNSPECIFIEDhttps://orcid.org/0000-0001-6101-2513UNSPECIFIED
Grott, MatthiasUNSPECIFIEDhttps://orcid.org/0000-0002-8613-7096UNSPECIFIED
Date:2022
Journal or Publication Title:Infrared Remote Sensing and Instrumentation XXX 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:12233
DOI:10.1117/12.2634262
Page Range:p. 1223301
Publisher:SPIE - Society of Photo-optical Instrumentation Engineers
Series Name:Proceedings of SPIE
ISSN:0277-786X
ISBN:978-1-5106 5450-1
Status:Published
Keywords:Io, Saturn, Spektroskopie, Sensorik
Event Title:SPIE Optical Engineering + Applications
Event Location:San Diego, USA
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - Project BepiColombo - MERTIS and BELA
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Institute of Planetary Research > Planetary Sensor Systems
Institute of Optical Sensor Systems > Space Instruments
Deposited By: Helbert, Dr.rer.nat. Jörn
Deposited On:02 Dec 2022 09:20
Last Modified:17 Nov 2023 12:36

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