  Currently, Mars is the celestial object with the biggest quantity of devices
made by mankind. This fact explain the astronomical quantity of data available
about this planet, which allows several studies in several lines of research.
Here we present the result of a monograph in Space Geophysics, in a graduation
in Geophysics, the data used were collected by the device PFS (Planetary
Fourier Spectrometer) in the mission MEX (Mars Express) launched in 2006. The
main aim was the verification of the existence of methane (CH 4 ) in a specific
region in the atmosphere of the Red Planet. The target region, Gale Crater, is
where the Rover Curiosity is right now. Therefore, the choice was because the
strong evidence of liquid water in the past on this site, and because Curiosity
has identified an unusual amount of methane in the local atmosphere.
