loading page

MEDA HS: Relative humidity sensor for the Mars 2020 Perseverance rover
  • +13
  • Maria Hieta,
  • Maria Genzer,
  • Jouni Polkko,
  • Iina Jaakonaho,
  • Shahin Tabandeh,
  • Andreas Lorek,
  • Stephen Garland,
  • Jean-Pierre De Vera,
  • Erik Fischer,
  • Germán M Martínez,
  • Ari-Matti Harri,
  • Leslie Tamppari,
  • Harri Haukka,
  • Matias Meskanen,
  • Manuel de la Torre Juárez,
  • José Antonio Rodriguez Manfredi
Maria Hieta
Finnish Meteorological Institute

Corresponding Author:[email protected]

Author Profile
Maria Genzer
Finnish Meteorological Institute
Author Profile
Jouni Polkko
Finnish Meteorological Institute
Author Profile
Iina Jaakonaho
Finnish Meteorological Institute
Author Profile
Shahin Tabandeh
VTT Technical Research Centre of Finland Ltd
Author Profile
Andreas Lorek
Deutsches Zentrum für Luft- und Raumfahrt e. V.
Author Profile
Stephen Garland
Deutsches Zentrum für Luft- und Raumfahrt e. V.
Author Profile
Jean-Pierre De Vera
Space Operations and Astronaut Training
Author Profile
Erik Fischer
University of Michigan
Author Profile
Germán M Martínez
Lunar and Planetary Institute
Author Profile
Ari-Matti Harri
Finnish Meteorological Institute
Author Profile
Leslie Tamppari
Jet Propulsion Laboratory
Author Profile
Harri Haukka
Finnish Meteorological Institute
Author Profile
Matias Meskanen
Finnish Meteorological Institute
Author Profile
Manuel de la Torre Juárez
Jet Propulsion Laboratory
Author Profile
José Antonio Rodriguez Manfredi
Centro de Astrobiología (INTA-CSIC)
Author Profile

Abstract

The Finnish Meteorological Institute (FMI) provides a relative humidity measurement sensor (HS) for NASA’s Mars 2020 rover. The sensor is a part of the Mars Environmental Dynamic Analyzer (MEDA), a suite of environmental sensors provided by Spain’s Centro de Astrobiología. The main scientific goal of the humidity sensor is to measure the relative humidity of the Martian atmosphere near the surface and to complement previous Mars mission atmospheric measurements for a better understanding of Martian atmospheric conditions and the hydrological cycle. Relative humidity has been measured from the surface of Mars previously by Phoenix and Curiosity. Compared to the relative humidity sensor on board Curiosity, the MEDA HS is based on a new version of the polymeric capacitive humidity sensor heads developed by Vaisala. Calibration of humidity devices for Mars conditions is challenging and new methods have been developed for MEDA HS. Calibration and test campaigns have been performed at the FMI, at University of Michigan and the German Aerospace Center (DLR) in Berlin to achieve the best possible calibration. The accuracy of HS and uncertainty of the calibration has been also analysed in detail with VTT Technical Research Centre of Finland. Assessment of sensor performance after landing on Mars confirms that the calibration has been successful, and the HS is delivering high quality data for the science community.
Nov 2022Published in Planetary and Space Science volume 223 on pages 105590. 10.1016/j.pss.2022.105590