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[i]Javier Benedicto, ESA’s Galileo program manager, said during the briefing that Galileo teams have examined more than 40 different failure scenarios in the search for a cause, with no firm results thus far. The investigation has included asking satellite component builders to reproduce certain components for testing. It has also included tilting the affected satellite to assess radiation pattern changes on the spacecraft’s L-band antenna, he said. Benedicto said the investigating team concluded that maintaining high broadcast power might exacerbate the problem, so all four satellites’ output was dropped by 1.5 decibels. The May power loss was on the satellite named FM-4. An apparently unrelated power drop occurred in mid-2013 on the FM-3 satellite, Benedicto said, resulting in a 2-decibel decrease in power on one of the satellite’s signals. The investigation into that early incident is also ongoing, Benedicto said. No root cause has been found, and the inquiry has now been merged with the search for a cause for the FM-4 failure.[/i]
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