<div dir="ltr"><a href="http://www.nature.com/news/computing-glitch-may-have-doomed-mars-lander-1.20861">Computing glitch may have doomed Mars lander</a><div><br></div><div>"....Schiaparelli sent data to its mother ship during its descent. Preliminary analysis suggests that the lander began the manoeuvre flawlessly, braking against the planet’s atmosphere and deploying its parachute. But at 4 minutes and 41 seconds into an almost 6-minute fall, something went wrong. The lander’s heat shield and parachute ejected ahead of time, says Vago. Then thrusters, designed to decelerate the craft for 30 seconds until it was metres off the ground, engaged for only around 3 seconds before they were commanded to switch off, because the lander's computer thought it was on the ground.</div><div><br></div>"The lander even switched on its suite of instruments, ready to record Mars’s weather and electrical field, although they did not collect data. <br><br>"The craft probably fell from a height of between 2 and 4 kilometres before slamming into the ground at more than 300 kilometres per hour, according to estimates based on images of the probe’s likely crash site, taken by NASA’s Mars Reconnaissance Orbiter on 20 October.<div><br></div><div>"The most likely culprit is a flaw in the craft’s software or a problem in merging the data coming from different sensors, which may have led the craft to believe it was lower in altitude than it really was, ...<br><div><div><br></div><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr"><div>William J. Schroeder, PhD<br>Kitware, Inc. - Building the World's Technical Computing Software<br>28 Corporate Drive<br>Clifton Park, NY 12065<br><a href="mailto:will.schroeder@kitware.com" target="_blank">will.schroeder@kitware.com</a><br><a href="http://www.kitware.com" target="_blank">http://www.kitware.com</a><br>(518) 881-4902</div></div></div>
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