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Friday 18 April 2014

This photo taken on March 3 shows the large hydrazine propellant tank prior to integration with the core structure of the MAVEN spacecraft at a Lockheed Martin clean room near Denver.  The tank was built by ATK Aerospace Group. - Image credit: Lockheed Martin

This photo taken on March 3 shows the large hydrazine propellant tank prior to integration with the core structure of the MAVEN spacecraft at a Lockheed Martin clean room near Denver. The tank was built by ATK Aerospace Group. - Image credit: Lockheed Martin

Planetary

Instrument Delivered for NASA’s Upcoming Mars Mission

DENVER, Colo. — A remote sensing instrument that will peer into the ultraviolet to offer clues to how Mars might have lost its atmosphere has arrived at Lockheed Martin for integration into NASA’s Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft.

“The Remote Sensing package team built a system that meets all technical requirements and delivered it on schedule and on budget,” said David Mitchell, MAVEN project manager from NASA Goddard Space Flight Center in Greenbelt, Md. “I look forward to the instrument’s next level of integration onto the spacecraft and ultimately the science it will provide.”

The Remote Sensing package consists of an Imaging UltraViolet Spectrograph (IUVS) and its control electronics box, the Remote Sensing Data Processing Unit (RSDPU). The Remote Sensing package was conceived, designed and built by the University of Colorado’s Laboratory for Atmospheric and Space Physics (CU/LASP) at Boulder, under contract to NASA Goddard.

The Imaging UltraViolet Spectrograph collects the light and spreads it out into spectra and records the spectra using imaging detectors. IUVS is the eyes of the instrument. The Remote Sensing Data Processing Unit is the main electronics box that controls IUVS, and communicates with the spacecraft. RSDPU receives and executes the commands sent to tell IUVS when and where to look. RSDPU is the brain of the instrument.

“The IUVS performs ‘remote sensing’, meaning we can study the planet and its atmosphere at a distance through the light it emits,” said Nick Schneider, IUVS lead scientist from CU/LASP. “Ultraviolet light is especially diagnostic of the state of the atmosphere, so our instrument provides the global context of the whole atmosphere for the local measurements made by the rest of the payload.”

The Remote Sensing package will be turned on for its initial checkout 21 days after launch. Later in the cruise phase of the mission from Earth to Mars, the package will be powered on twice more for state-of-health checks and in-flight calibration.

“With the delivery of this package, we are shifting from assembling the basic spacecraft to focusing on getting the science instruments onto the spacecraft,” said Bruce Jakosky, MAVEN principal investigator from CU/LASP. “This is a major step toward getting us to launch and then getting the science return from the mission.”

Launching late next year, MAVEN will be the first mission devoted to understanding the martian upper atmosphere. The goal of MAVEN is to determine the history of the loss of atmospheric gases to space through time, providing answers about Mars climate evolution. By measuring the current rate of escape to space and gathering enough information about the relevant processes, scientists will be able to infer how the planet’s atmosphere evolved in time.

The MAVEN spacecraft will carry two other instrument suites. The Particles and Fields Package, built by the University of California at Berkeley Space Science Laboratory with support from University of Colorado at Boulder’s Laboratory for Atmospheric and Space Physics (CU/LASP) and NASA Goddard, contains six instruments that will characterize the solar wind and the ionosphere of the planet. The Neutral Gas and Ion Mass Spectrometer, provided by NASA Goddard, will measure the composition and isotopes of neutral ions.

“Three of the big milestones in an instrument builder’s life are the day you get selected to fly on a mission, the day you deliver the instrument to the spacecraft to get ready for launch, and the day that it gets where it’s going and data starts flowing back from space,” said Mark Lankton, Remote Sensing package program manager from CU/LASP. “The Remote Sensing team is really happy to have gotten to the second milestone, and we can hardly wait to reach the third.”

MAVEN’s principal investigator is based at CU/LASP. The university will provide science operations, build instruments, and lead Education/Public Outreach. NASA Goddard manages the project and is building two of the science instruments for the mission. Lockheed Martin of Littleton, Colo., is building the spacecraft and is responsible for mission operations. The University of California at Berkeley Space Sciences Laboratory is building science instruments for the mission. NASA’s Jet Propulsion Laboratory, Pasadena, Calif., provides navigation support, the Deep Space Network, and the Electra telecommunications relay hardware and operations.

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