November 11, 2014

Provided by Guy Webster/Jet Propulsion Laboratory and Nancy Neal Jones/Goddard Space Flight Center

The newest node in NASAs Mars telecommunications network a radio aboard the MAVEN orbiter custom-designed for data links with robots on the surface of Mars handled a copious 550 megabits during its first relay of real Mars data.

MAVENs Electra UHF radio received the transmission from NASAs Curiosity Mars rover on Nov. 6, using an adaptive data rate as the orbiter passed through the sky over the rover. The data that MAVEN relayed to NASAs Deep Space Network of large dish antennas on Earth included several images of terrain that Curiosity has been examining at the base of Mars Mount Sharp. The test also included relaying data to Curiosity from Earth via MAVEN.

MAVEN (for Mars Atmosphere and Volatile EvolutioN) entered orbit around Mars on Sept. 21. The orbiter is finishing a commissioning phase including calibration of its science instruments and fine tuning of its orbit before its prime science phase starts. MAVEN will investigate the upper atmosphere of Mars to provide understanding about processes that led to the loss of much of the original Martian atmosphere.

Two older NASA orbiters, Mars Odyssey and Mars Reconnaissance Orbiter, currently provide data relay for NASAs two active Mars rovers while also continuing to study Mars. Using relay via orbiters, compared with the rovers capability to transmit directly to Earth, greatly increases science data return from the Martian surface.

MAVEN will be available during its prime science mission to provide relay services if issues arise with the other orbiters, and it may routinely provide relay support during an anticipated extended mission.

The Electra design is also on UHF radios aboard Curiosity and Mars Reconnaissance Orbiter. It includes relay-enhancing features such as the ability to automatically adjust data rate to signal strength as the distance to the rover changes during the orbiters overflight. MAVENs orbit is more elongated than the orbits of either Mars Odyssey or Mars Reconnaissance Orbiter. During the Nov. 6 test, MAVENs distance from Curiosity ranged from about 680 miles to 2,300 miles (1,110 to 3,700 kilometers), farther than is typical in communication sessions between the Curiosity rover and the other orbiters.

MAVENs principal investigator is based at the University of Colorados Laboratory for Atmospheric and Space Physics, and NASAs Goddard Space Flight Center in Greenbelt, Maryland, manages the MAVEN project. NASAs Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, supplied and operates MAVENs Electra payload and provides Deep Space Network support for the mission.

For more information about the MAVEN mission, visit: http://www.nasa.gov/maven and http://lasp.colorado.edu/home/maven/. For more information about NASAs Mars Exploration Program, see: http://marsprogram.jpl.nasa.gov.

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Mars MAVEN Orbiter Demonstrates Its Relay Prowess