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Potential Effects of Surface Temperature Variations and Disturbances and Thermal Convection on the Mars InSight HP3 Heat-Flow Determination

Morgan, P. and Smrekar, S.E. and Lorenz, R.D. and Grott, M. and Kroemer, O. and Müller, N. (2017) Potential Effects of Surface Temperature Variations and Disturbances and Thermal Convection on the Mars InSight HP3 Heat-Flow Determination. Space Science Reviews, pp. 1-37. Springer. doi: 10.1007/s11214-017-0388-y. ISSN 0038-6308.

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Official URL: https://link.springer.com/article/10.1007/s11214-017-0388-y#aboutcontent


The HP3 instrument on the InSight lander mission will measure subsurface temperatures and thermal conductivities from which heat flow in the upper few meters of the regolith at the landing site will be calculated. The parameter to be determined is steady-state conductive heat flow, but temperatures may have transient perturbations resulting from surface temperature changes and there could be a component of thermal convection associated with heat transport by vertical flow of atmospheric gases over the depth interval of measurement. The experiment is designed so that it should penetrate to a depth below which surface temperature perturbations are smaller than the required measurement precision by the time the measurements are made. However, if the measurements are delayed after landing, and/or the probe does not penetrate to the desired depth, corrections may be necessary for the transient perturbations. Thermal convection is calculated to be negligible, but these calculations are based on unknown physical properties of the Mars regolith. The effects of thermal convection should be apparent at shallow depths where transient thermal perturbations would be observed to deviate from conductive theory. These calculations were required during proposal review and their probability of predicting a successful measurement a prerequisite for mission approval. However, their uncertainties lies in unmeasured physical parameters of the Mars regolith.

Item URL in elib:https://elib.dlr.de/114305/
Document Type:Article
Title:Potential Effects of Surface Temperature Variations and Disturbances and Thermal Convection on the Mars InSight HP3 Heat-Flow Determination
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Morgan, P.Colorado Geological SurveyColorado School of MinesGolden, USAUNSPECIFIEDUNSPECIFIED
Smrekar, S.E.jet propulsion laboratory, california institute of technology, pasadena, usaUNSPECIFIEDUNSPECIFIED
Lorenz, R.D.space department, johns hopkins university applied physics lab, maryland, usaUNSPECIFIEDUNSPECIFIED
Müller, N.jet propulsion laboratory, california institute of technology, 4800 oak grove dr., pasadena ca, 91109UNSPECIFIEDUNSPECIFIED
Date:2 August 2017
Journal or Publication Title:Space Science Reviews
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 1-37
EditorsEmailEditor's ORCID iDORCID Put Code
Bloemen, H.SRON Netherlands Institute for Space ResearchUNSPECIFIEDUNSPECIFIED
Keywords:Mars, Heat flow, InSight, HP3, Conduction, Convection, Barometric pumping
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 - Exploration of the Solar System
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research
Institute of Planetary Research > Planetary Physics
Institute of Space Systems > Land and Exploration Technology
Deposited By: Rückriemen, Tina
Deposited On:21 Sep 2017 10:26
Last Modified:03 Aug 2018 15:29

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