Upper Stage Issue Causes Arianespace Launch Failure, Costing 2 Satellites
upstart writes in with an IRC submission for SoyCow0495:
Upper stage issue causes Arianespace launch failure, costing 2 satellites:
Bad Cabling Blamed for Failed Launch of European SatellitesAn overnight launch of Arianespace's Vega rocket failed after reaching space, costing France and Spain an Earth-observing satellite each. The failure represents the second in two years after Vega had built up a spotless record over its first six years of service.
[...] Something went wrong with the liquid-fueled [fourth] stage after it had reached an altitude of over 200km. While it's not entirely clear at the time what had failed, in the words of Arianespace CEO Stephane Israel, "The speed was not nominal anymore." This caused the upper stage and satellites to veer off the planned trajectory, and Arianespace lost control of the vehicle shortly afterward. The spacecraft returned to Earth near where the upper stage was expected to fall in an area that's completely uninhabited.
The failure happened at a stage of the launch where Arianespace is able to obtain detailed telemetry data from tracking stations in North America.
[...] The company's initial investigation focused on the engine of the liquid-fueled fourth stage, specifically "a problem related to the integration of the fourth-stage AVUM nozzle activation system," which was "the most likely cause of the loss of control of the launcher." Arianespace has already named a European Space Agency official who will head the inquiry into the failure, which will focus on why the problem wasn't caught and corrected prior to launch.
upstart writes in with an IRC submission for Runaway1956_:
Bad cabling blamed for failed launch of European satellites:
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