Mars Rover Team Diagnosing Unexpected Behavior | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

** Airborne 04.23.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.23.14 **
** Airborne 04.21.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.21.14 **
** Airborne 04.18.14--CLICK HERE! ** HD iPad-Friendly Version--Airborne 04.18.14 **

Thu, Jan 29, 2009

Mars Rover Team Diagnosing Unexpected Behavior

Spirit Grows Increasingly Unresponsive

The team operating NASA's Mars Exploration Rover Spirit plans diagnostic tests this week, after Spirit did not report some of its weekend activities, including a request to determine its orientation after an incomplete drive.

On Sunday -- during the 1,800th Martian day ("sol") of what was initially planned as a 90-sol mission on Mars -- information radioed from Spirit indicated the rover had received its driving commands for the day but had not moved. That can happen for many reasons, including the rover properly sensing that it is not ready to drive. However, other behavior on Sol 1800 was even more unusual: Spirit apparently did not record the day's main activities into the non-volatile memory, the part of its memory that persists even when power is off.

On Monday, Spirit's controllers at NASA's Jet Propulsion Laboratory in Pasadena, CA chose to command the rover on Tuesday, Sol 1802, to find the sun with its camera in order to precisely determine its orientation. Not knowing its orientation could have been one possible explanation for Spirit not doing its weekend drive. Early Tuesday, Spirit reported that it had followed the commands, and in fact had located the sun, but not in its expected location.

"We don't have a good explanation yet for the way Spirit has been acting for the past few days," said JPL's Sharon Laubach, chief of the team that writes and checks commands for the rovers. "Our next steps will be diagnostic activities."

Among other possible causes, the team is considering a hypothesis of transitory effects from cosmic rays hitting electronics. On Tuesday, Spirit apparently used its non-volatile memory properly.

Despite the rover's unexplained behavior, Mars Exploration Rovers' Project Manager John Callas of JPL said Wednesday, "Right now, Spirit is under normal sequence control, reporting good health and responsive to commands from the ground."

JPL, a division of the California Institute of Technology, Pasadena, manages the Mars Exploration Rover project for the NASA Science Mission Directorate, Washington. Spirit and its twin, Opportunity, landed on Mars in January 2004 and have operated 20 times longer than their original prime missions.

FMI: www.nasa.gov

Advertisement

More News

Luftwaffe Ju 52 Discovered On The Bottom Of The Black Sea

Plane Disappeared 67 Years Ago On Transport Mission To The Eastern Front A plane missing since 1942 has been discovered in about 75 feet of water in the Black Sea has been identifi>[...]

AD: British Aerospace Regional Aircraft Airplanes

AD NUMBER: 2014-07-09 PRODUCT: British Aerospace Regional Aircraft Jetstream Series 3101 and Jetstream Model 3201 airplanes.>[...]

AD: Airbus Airplanes

AD NUMBER: 2014-08-04 PRODUCT: Certain Airbus Model A310 series airplanes.>[...]

ANN's Daily Aero-Linx (04.24.14)

South Bay Soaring Society The South Bay Soaring Society (SBSS) is a non-profit radio controlled glider club based in San Jose, CA. They have flying sites in San Jose, Santa Clara, >[...]

ANN's Daily Aero-Term (04.24.14): Dew Point (Abbrev. DWPT)

A measure of atmospheric moisture. It is the temperature to which air must be cooled in order to reach saturation (assuming air pressure and moisture content are constant).>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2014 Web Development & Design by Pauli Systems, LC