05.15.2017 Putting Martian 'Tribulation' Behind
05.15.2017 From 'Tribulation' to 'Perseverance' on Mars
04.20.2017 Chemical Laptop Team
04.20.2017 Subcritical Water Extractor
04.20.2017 Chemical Laptop
04.20.2017 Atacama Landscape
03.30.2017 Measuring Mars' Atmosphere Loss
03.29.2017 Lifetime Achievement Award to Theisinger
03.29.2017 A Decade of Compiling the Sharpest Mars Map
03.21.2017 Break in Raised Tread on Curiosity Wheel
03.17.2017 COBALT/JPL team
03.09.2017 Back-to-Back Martian Dust Storms
02.27.2017 Swirling Dust in Gale Crater, Mars, Sol 1613
02.27.2017 Dust Devil Passes Near Martian Sand Dune
02.27.2017 Sand Moving Under Curiosity, One Day to Next
02.08.2017 Mars Reconnaissance Orbiter Observes Changes
01.26.2017 Mono Lake
01.25.2017 'Wing' Dike of Hardened Lava in New Mexico
01.25.2017 Blade-Like Martian Walls Outline Polygons
01.23.2017 Spirit And Opportunity By The Numbers
01.10.2017 Mars 2020 Rover - Artist's Concept
01.06.2017 Earth and Its Moon, as Seen From Mars
12.13.2016 Now and Long Ago at Gale Crater, Mars
12.13.2016 Where's Boron? Mars Rover Detects It
11.15.2016 Schiaparelli Impact Site on Mars, Stereo
11.03.2016 Schiaparelli Impact Site on Mars, in Color
10.17.2016 MAVEN Captures Rapid Cloud Formation
10.17.2016 Mars' Nightside Atmosphere
10.17.2016 Ultraviolet Image Near Mars' South Pole
10.17.2016 Ultraviolet Mars Reveals Cloud Formation
10.05.2016 Dust Haze Hiding the Martian Surface in 2001
10.04.2016 Test of Lander Vision System for Mars 2020
10.03.2016 A Sharpened Ultraviolet View of Mars
10.03.2016 Curiosity Self-Portrait at 'Murray Buttes'
10.03.2016 Butte 'M9a' in 'Murray Buttes' on Mars
Electra Relay Radio on MAVEN Mission to MarsNASA's Mars-bound MAVEN spacecraft (for Mars Atmosphere and Volatile Evolution) carries this relay radio transmitter and receiver to be used for UHF (ultra-high frequency) communication with robots on the surface of Mars. It is MAVEN's Electra UHF Transceiver, which passed an in-flight checkout on the spacecraft on Feb. 19, 2014.
Orbiter relay of data from Mars rovers and stationary landers provides return of much more information to Earth than would be possible using only the capability for transmitting data directly from the Mars surface to Earth. NASA's Mars Odyssey orbiter and Mars Reconnaissance Orbiter have provided relay support for the rovers Spirit, Opportunity and Curiosity and for the Phoenix lander. Electra radios, already in use on Mars Reconnaissance Orbiter and Curiosity, are software-defined, enabling them to autonomously adjust their data rate to suit variations in signal strength due to angles and transmission distance as the orbiter crosses the sky over the rover.
This transceiver, the flight model for MAVEN, is about 8.6 inches (22 centimeters) long and 5 inches (13 centimeters) tall. NASA's Jet Propulsion Laboratory, Pasadena, Calif., provided and operates it. MAVEN will be available to provide relay support on a contingency basis during its prime mission and may routinely provide relay support during an extended mission.
MAVEN will examine the upper atmosphere of Mars to provide an understanding about processes that led to the loss of much of the original Martian atmosphere. Data and analysis could tell planetary scientists the history of climate change on the Red Planet and provide further information on the history of planetary habitability. The spacecraft was launched on Nov. 18, 2013, and will enter orbit around Mars in September 2014.
NASA Goddard Space Flight Center in Greenbelt, Md., manages the MAVEN project for NASA's Science Mission Directorate, Washington, and built some of the science instruments for the mission. MAVEN's principal investigator is based at the University of Colorado's Laboratory for Atmospheric and Space Physics in Boulder. The university provided science instruments and leads science operations, as well as education and public outreach, for the mission. Lockheed Martin Space Systems, Denver, built and operates the spacecraft. The University of California at Berkeley's Space Sciences Laboratory provided instruments for the mission. JPL, a division of the California Institute of Technology in Pasadena, provides navigation support and Deep Space Network support, in addition to the Electra hardware and operations.
Image Credit: NASA/JPL-Caltech