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Calibration and first results of relative humidity sensor MEDA HS onboard M2020 rover

Hieta, Maria and Polkko, Jouni and Jaakonaho, Iina and Lorek, Andreas and Garland, Stephen and de Vera, J. P. and Martinez, German and Fischer, Erik and Manfredi, J. A. R. and Tamppari, Leslie and de la Torre Juarez, M. (2021) Calibration and first results of relative humidity sensor MEDA HS onboard M2020 rover. EGU General Assembly 2021, 25.-30.4.2021, Wien. doi: 10.5194/egusphere-egu21-1213.

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Official URL: https://meetingorganizer.copernicus.org/EGU21/EGU21-12130.html


MEDA HS is the relative humidity sensor on the Mars 2020 Perseverance rover provided by theFinnish Meteorological Institute (FMI). The sensor is a part of Mars Environmental DynamicAnalyzer (MEDA), a suite of environmental sensors provided by Centro de Astrobiología in Madrid,Spain. MEDA HS, along with METEO-H in ExoMars 2022 surface platform, is a successor of REMS-Hon board Curiosity.Calibration of relative humidity (RH) instruments for Mars missions is challenging due to the rangeof RH (from 0 to close to 100%) and temperature conditions (from about -90 ºC to + 22 ºC) thatneed to be simulated in the lab. Thermal gradients in different parts of the system need to be wellknown and controlled to ensure reliable reference RH readings. For MEDA HS the calibration testshave been performed for different models of MEDA HS in three Martian humidity simulatorlaboratories: FMI laboratory, Michigan Mars Environmental Chamber (MMEC) and DLR PASLAB(Planetary Analog Simulation Laboratory). MEDA HS flight model was tested at FMI together with flight spare and ground reference models inlow pressure dry CO2 gas from +22ºC to -70ºC and in saturation conditions from -40ºC down to-70ºC. Further, the MEDA HS flight model final calibration is complemented by calibration datatransferred from an identical ground reference model which has gone through rigorous testingalso after the flight model delivery. During the test campaign at DLR PASLAB that started inAutumn 2020, MEDA HS has been calibrated over the full relative humidity scale between -70 to-40ºC in CO2 in the pressure ranges from 5.5 to 9.5 hPa, representative of Martian surfaceatmospheric pressure. The results can be extrapolated to higher and lower temperatures.In this presentation the final flight calibration and performance of the MEDA HS will be presentedtogether with first results expected from the surface of Mars by the Perseverance rover.

Item URL in elib:https://elib.dlr.de/147015/
Document Type:Conference or Workshop Item (Speech)
Title:Calibration and first results of relative humidity sensor MEDA HS onboard M2020 rover
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Hieta, MariaFinnish Meteorological Institute (FMI), Helsinki, FinlandUNSPECIFIED
Polkko, JouniFinnish Meteorological Institute (FMI), Helsinki, FinlandUNSPECIFIED
Jaakonaho, IinaFinnish Meteorological Institute (FMI), Helsinki, FinlandUNSPECIFIED
Lorek, AndreasAndreas.Lorek (at) dlr.dehttps://orcid.org/0000-0002-8960-6214
Garland, Stephenstephen.garland (at) dlr.deUNSPECIFIED
de Vera, J. P.jean-pierre.devera (at) dlr.dehttps://orcid.org/0000-0002-9530-5821
Martinez, GermanLunar and Planetary Institute/USRA, Houston, TX, USAUNSPECIFIED
Fischer, ErikUniversity of Michigan, Ann Arbor, USAUNSPECIFIED
Manfredi, J. A. R.Centro de Astrobiologia (INTA-CSIC), Madrid, SpainUNSPECIFIED
Tamppari, LeslieJet Propulsion Laboratory/California Institute of Technology, Pasadena, CA, USAUNSPECIFIED
de la Torre Juarez, M.NASA Jet Propulsion Laboratory, Pasadena, California, USAUNSPECIFIED
Date:25 April 2021
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
DOI :10.5194/egusphere-egu21-1213
Keywords:MEDA HS, humidity, Mars, Perseverance rover
Event Title:EGU General Assembly 2021
Event Location:Wien
Event Type:international Conference
Event Dates:25.-30.4.2021
Organizer:European Geosciences Union
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 - BioSigN (BioSignatures and habitabile Niches)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Planetary Laboratories
Deposited By: Lorek, Dr.rer.nat. Andreas
Deposited On:09 Dec 2021 09:31
Last Modified:09 Dec 2021 09:31

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