fredag 24. februar 2017

SpaceX med nav-problemer nær ISS - Curt Lewis


SpaceX waves off space station cargo delivery for a day


SpaceX's Dragon supply ship, loaded with nearly 5,500 pounds of cargo and experiments, aborted an approach to the International Space Station on Wednesday after encountering a problem in its GPS navigation system.

The gumdrop-shaped, solar-powered spacecraft was about 1,200 feet, or 365 meters, from the space station when it automatically bailed out of the rendezvous, escaping the immediate vicinity of the research outpost as its safety system intended and setting up for another approach as soon as Thursday.

NASA said SpaceX's mission director at the Dragon control center in Hawthorne, California, reported the aborted rendezvous at 3:25 a.m. EST (0825 GMT) when the spacecraft ran into trouble processing GPS navigation data.

"The SpaceX engineers are tracing this issue to an incorrect value that was detected in the spacecraft's Relative Global Positioning System hardware, which basically tells Dragon's computers, for its burn plan, where it is in the sky relative to the International Space Station," said Rob Navias, a NASA spokesperson providing commentary on NASA TV.




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