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Image above: Engineers in Goddard's large clean room prepare the flight spare Science Instrument Control & Data Handling unit, known as SIC&DH 2, for electrical performance testing. Image Credit: NASA/Chris Gunn > View Larger Image
Image above: SM4 astronauts practice installing the new SIC&DH during a recent training activity at the Neutral Buoyancy Laboratory (NBL) at the Johnson Space Center in Houston, Texas. Image Credit: NASA/Chris Gunn > View Larger Image
Image above: SM4 astronauts practice installing the new SIC&DH during a recent training activity at the Neutral Buoyancy Laboratory (NBL) at the Johnson Space Center in Houston, Texas. Image Credit: NASA/Chris Gunn > View Larger Image