the late 1990's and early 21st Century, a new fleet of Mars orbiters
and landers, replete with state of the art surveillance equipment,
began to collect much more detailed data than had previously been
available and a less inert, more dynamic Mars began to reveal itself.
From 1997, Mars Global surveyor, joined by Mars Odyssey in 2001,
constantly monitored the planet's surface.
Mission’section on E7.ie for lists of surveyors and landers,
and their respective developers and researchers.