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GRACE-FO satellites get an earful
02 May 2017
The two GRACE-FO (GRACE = Gravity Recovery and Climate Experiment, FO = Follow-On) Earth observation satellites, which Airbus Friedrichshafen developed and constructed for NASA/JPL, were ‘given an earful' during recent acoustic tests.
The sound impact that builds up during rocket launches was simulated in an echo chamber with a volume of around 1,400 m³ at IABG in Ottobrunn near Munich. In four test cycles, the satellites in their flight position were subjected to a sound impact of nearly 140 decibels (dB). In comparison, a pneumatic drill produces 100 dB and the human pain threshold is 130 dB. Both satellites passed the tests with flying colours.
Source: Airbus Defence and Space
Image credit: Airbus DS GmbH - Preparations for the acoustic noise test for the two GRACE-FO satellites