Mars Surveyor is the name of a Mars research program operated by NASA . The Mars Surveyor 1998 Orbiter , later called Mars Climate Orbiter , was launched into a low altitude orbit and was lost. The cause were conversion errors from SI units to American units . The Mars Surveyor 1998 Lander , also known as the Mars Polar Lander , also reached Mars, but no signals could be received from it after entering the Martian atmosphere.
Mars Surveyor 2001
The Mars Surveyor 2001 program had two successor probes. The Mars Surveyor 2001 lander with a rover was partially built but not launched. The Mars Surveyor 2001 Orbiter , now known as 2001 Mars Odyssey , was launched on April 7, 2001. Since February 19, 2002, it has successfully mapped the surface of Mars and served the Mars rovers Spirit and Opportunity as a relay station for the radio link to Earth.
Components of the partially completed Mars Surveyor 2001 lander were later used in the Phoenix space probe, which was launched on August 4, 2007 and ended its mission on November 10, 2008.