Mixture Ratio Valve identified as Culprit in Atlas V Launch Anomaly with Cygnus OA-6

United Launch Alliance has isolated the root cause of the performance hit suffered by the Atlas V’s first stage in last month’s Cygnus OA-6 mission that left the Centaur upper stage only with second of fuel margin to send the cargo spacecraft on its way to the International Space Station.

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Japanese Hitomi X-Ray Observatory declared Lost, Post-Mortem Investigation begins

The Japanese Aerospace Exploration Agency has officially declared the Hitomi X-Ray Observatory lost and ceased all attempts to communicate with the stricken spacecraft, marking the untimely end of a mission that promised a great scientific return in the field of high-energy astrophysics.

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Sentinel-1B completes critical Deployments, VS14 Secondary Payloads tracked in Orbit

The Sentinel-1B satellite – set to complete the radar pair in the Copernicus satellite constellation – successfully spread its wings in orbit, deploying its solar arrays and 12-meter long radar antenna as part of its critical three-day Launch and Early Operations Phase.

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