Jesper Henneke

Using a Single Imager and Structured Light for High Resolution and Accurate 3D Mapping of Microscopic Terrain on Mars

David Arge Klevang, Jonas H. Nielsen, Jesper Henneke, Lawrence A. Wade et autres

The navigational sensor onboard PIXL, the Micro Context Camera, is equipped with active LED multispectral floodlight and laser structured light capabilities. The first ensures a homogeneous lighted scene, to capture the optical context of the surface. The structured light consists of 2 …

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Mineralogically Diverse and Salt‐Rich Regolith in Jezero Crater Characterized Using X‐Ray Spectroscopy

Andrew O. Shumway, T. V. Kizovski, David C. Catling, Scott J. V. VanBommel et autres

Abstract The Planetary Instrument for X‐ray Lithochemistry (PIXL) onboard the Perseverance rover has characterized the composition of Martian regolith at a scale of hundreds of microns using micro‐focus X‐ray fluorescence spectroscopy. PIXL data reveal a diverse population of regolith grains with distinct …

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In situ evidence for serpentinization within the Máaz formation, Jezero crater, Mars

Nicholas J. Tosca, Michael M. Tice, J. A. Hurowitz, David A. K. Pedersen et autres

As both a source of atmospheric H 2 and a sink for liquid water, the serpentinization of olivine-bearing rocks is widely thought to have influenced the long-term evolution of the early martian atmosphere and hydrosphere. However, the mechanisms, timing, and global importance …

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The Brac/Dourbes Olivine‐Cumulate Rock, Séítah Formation, Jezero Crater Floor, Mars: Its Parent Magma, and Relation to Basalts of the Máaz Formation

Allan H. Treiman, Juan David Hernández‐Montenegro, R. C. Wiens, Lawrence A. Wade et autres

Abstract The Mars 2020 rover, Perseverance, encountered a range of basaltic igneous rocks on the floor of Jezero crater, two of which are olivine cumulates, formed by accumulation of olivine crystals from basaltic magma. These olivine cumulates lie in a geomorphically distinct …

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Diverse and highly differentiated lava suite in Jezero crater, Mars: Constraints on intracrustal magmatism revealed by Mars 2020 PIXL

M. E. Schmidt, T. V. Kizovski, Yang Liu, Juan David Hernández‐Montenegro et autres

The Jezero crater floor features a suite of related, iron-rich lavas that were examined and sampled by the Mars 2020 rover Perseverance, and whose textures, minerals, and compositions were characterized by the Planetary Instrument for X-ray Lithochemistry (PIXL). This suite, known as …

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Inorganic interpretation of luminescent materials encountered by the Perseverance rover on Mars

Eva L. Scheller, Tanja Bosak, Francis M. Mccubbin, Kenneth H. Williford et autres

A major objective of the Mars 2020 mission is to sample rocks in Jezero crater that may preserve organic matter for later return to Earth. Using an ultraviolet Raman and luminescence spectrometer, the Perseverance rover detected luminescence signals with maximal intensities at …

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Pre- and In-flight Performance of Terrain Relative Navigation on PIXL’s Micro Context Camera, M2020

Jesper Henneke, Mathias Benn, Troelz Denver, Peter Siegbjørn Jørgensen et autres

The thermal environment on the surface of Mars presents a challenge to any mission and instrumentation conducting surface operations on Mars, and the Planetary Instrument for X-Ray Lithochemistry (PIXL) is no exception. The martian diurnal temperature swing can span almost 100 degrees …

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A Radiometric Correction Method and Performance Characteristics for PIXL’s Multispectral Analysis Using LEDs

Jesper Henneke, Yang Liu, John Leif Jørgensen, Troelz Denver et autres

Abstract The Planetary Instrument for X-ray Lithochemistry (PIXL) onboard the Perseverance rover, part of NASA’s Mars 2020 mission, has the first camera system that utilizes active light sources to generate multispectral data directly on a planetary surface. PIXL collects the multispectral data …

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Hardware-in-the-Loop Simulations of a Navigation Camera in a Cometary Dust Environment

Christina Toldbo, Jesper Henneke, John Leif Jørgensen, Per Bodin et autres

This paper presents a novel hardware-in-the loop (HIL) simulation tool with the capability to accurately and realistically test the response of optical systems during a fly-by of a comet through the central coma region i.e. in a heavy dust environment. The HIL …

The High Energy Particle Populations of Earth Mapped by Swarm and MMS

Christina Toldbo, Matija Herceg, Julia Sushkova, Troelz Denver et autres

The three spacecraft which constitute the Swarm mission are equipped with the Micro Advanced Stellar Compass (μASC) provided by the Technical University of Denmark (DTU) for attitude determination. Each μASC is comprised of three Camera Head Units (CHUs) for a total of …

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Samples Collected From the Floor of Jezero Crater With the Mars 2020 Perseverance Rover

Justin I. Simon, Keyron Hickman‐Lewis, B. A. Cohen, Lisa E. Mayhew et autres

Abstract The first samples collected by the Mars 2020 mission represent units exposed on the Jezero Crater floor, from the potentially oldest Séítah formation outcrops to the potentially youngest rocks of the heavily cratered Máaz formation. Surface investigations reveal landscape‐to‐microscopic textural, mineralogical, …

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Pre-flight Geometric and Optical Calibration of the Planetary Instrument for X-ray Lithochemistry (PIXL)

Carl Christian Liebe, Jesper Henneke, John Leif Jørgensen, Robert F. Sharrow et autres

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