Model of Mars troposphere

Introduction Download

Introduction

  • We propose here a simple model to compute the Mars troposphere errors afflicting a radio-wave transponded from the surface of Mars. The troposphere zenithal delay is first derived from the surface pressure at the lander location. We use a mapping function to infer the slant delay (range errors) induced by the troposphere of Mars. Being proportional to range rates, the contribution of Mars troposphere to the Doppler measurements is derived from the slant delays. A more detailed description is given in Le Maistre, 2020.

    • Citation : Le Maistre, Martian lander radio-science data calibration for Mars troposphere, Radio Science, submitted.

    Contact : sebastien.lemaistre@oma.be

    Surface pressure (top) and zenithal delay (bottom) versus time for each X-band Doppler data point of the InSight-RISE, Opportunity and Pathfinder missions

    Mars troposphere Doppler contribution for each 60s-compressed X-band Doppler data point of the InSight-RISE, Opportunity and Pathfinder missions as a function of the LOS elevation

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    1. Files :
      1. MarsTropoCalib_func.f90 : Fortran source code
      2. TropoMars_MPF.dat : Mars Pathfinder data
      3. TropoMars_MER1.dat : Opportunity data
      4. TropoMars_RISE_April2020.dat : InSight data