MTC

MTC is a proposed Mars analog to Universal Time (UT1) on Earth. It is defined as the mean solar time at Mars's prime meridian. The prime meridian was first proposed by German astronomers and in 1830 as marked by the fork in the later named by Italian astronomer. This convention was readily adopted by the astronomical community, the result being that Mars had a universally accepted prime meridian half a century before the of 1880 established one for Earth. The definition of the Martian prime meridian has since been refined on the basis of spacecraft imagery as the center of the crater in Terra Meridiani. The name "MTC" is intended to parallel the Terran (UTC), but this is somewhat misleading: what distinguishes UTC from other forms of UT is its, but MTC does not use any such scheme. MTC is more closely analogous to.

Use of the term "MTC" as the name of a planetary standard time for Mars first appeared in the Mars24 sunclock coded by the NASA. It replaced Mars24's previous use of the term "Airy Mean Time" (AMT), which was a direct parallel of (GMT). In an astronomical context, "GMT" is a deprecated name for Universal Time, or sometimes more specifically for UT1.

AMT has not yet been employed in official mission timekeeping. This is partially attributable to uncertainty regarding the position of Airy-0 (relative to other longitudes), which meant that AMT couldn't be realized as accurately as local time at points being studied. At the start of the missions, the positional uncertainty of Airy-0 corresponded to roughly a 20-second uncertainty in realizing AMT.

MTC is simply the fractional part of MSD, in hours, minutes and seconds:[6 ]
 * MTC = (MSD mod 1) × 24 h