FMI's MVACS involvement : MET-P & EGA-P

Welcome to FMI's MVACS Homepage

FMI-team is participating in the MET instrument of the MVACS -lander (Mars Volatiles and Climate Surveyor) by providing hardware and by scientific collaboration. FMI's Barocap®-system was selected as the pressure device of the MVACS/MET instrument. MVACS is the landing element of the Mars Surveyor 1998 mission that consists of an Orbiter and the MVACS.


The original figure on the MVACS main page at UCLA (link below)<

The Meteorology (MET) package for the Mars Volatiles and Climate Surveyor (MVACS) will provide comprehensive measurements of the Martian near-surface atmosphere, namely atmospheric pressure, temperature, wind, and humidity. These will be the first surface-based observations of weather in the southern hemisphere of Mars and the first in the polar regions. Measurements of atmospheric pressure, temperature, and humidity will also be obtained during the descent phase of the mission.

FMI's involvement in MVACS

  • MVACS Co-I-ship
  • Responsibility of the scientific pressure measurements for MET/MVACS by providing the pressure device (MET-P).
  • Responsibility of the housekeeping pressure measurements of the EGA instrument (EGA-P for EGA)
  • FMI's HW-share in MVACS consists of :
  • Responsibility of the scientific pressure measurements for MET/MVACS by providing the pressure device (MET-P).
  • Responsibility of the housekeeping pressure measurements of the EGA instrument (EGA-P for EGA)
  • The figure on your left shows MET-P & EGA-P prototypes and one pressure sensor head.

  • Pressure device MET-P :
  • Subsystem of the MET-instrument
  • The sensing elements are four Barocap pressure sensor heads
  • Consists of sensor heads, amplifiers, power conditioning
  • Accuracy for Martian pressures better than 0.02 hPa
  • Dimensions : 55 x 45 x 25 mm
  • Weight less than 45 grams

  • Housekeeping pressure device EGA-P :
  • Subsystem of the EGA-instrument
  • The sensing element is one Barocap pressure sensor head
  • Consists of a sensor head, amplifier & power conditioning
  • Accuracy for Martian pressures better than 0.2 hPa
  • Dimensions : Ø25 x 15 mm
  • Weight less than 12 grams


  • MVACS
    MET-P & EGA-P
    Key Personnel
    SSF Inc. (Mars-96) FMI / GEO
    MET / MVACS MARS-96 / FMI Vaisala Barometrics Vaisala Inc.

    Comments to : Ari-Matti.Harri@fmi.fi Created: 10 August 1996 ------- Updated: 20 September 1996