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From right: Greg Holcomb, ATA balance calibration engineer, watches as Michael Sain, ATA instrument technician for PMEL, prepares to lower a metal sleeve over the cryostat to allow them to bring the temperature down to conditions similar to those found in space. One cryogenic sensor for a test cell is already inside the cryostat. Another cryogenic sensor that has been calibrated to National Institute of Standards and Technology standards is then installed in the cryostat to make a proper comparison. (Photo by Rick Goodfriend)


Success or failure can rest on a millisecond:

From right: Greg Holcomb, ATA balance calibration engineer, watches as Michael Sain, ATA instrument technician for PMEL, prepares to lower a metal sleeve over the cryostat to allow them to bring the temperature down to conditions similar to those found in space. One cryogenic sensor for a test cell is already inside the cryostat. Another cryogenic sensor that has been calibrated to National Institute of Standards and Technology standards is then installed in the cryostat to make a proper comparison. (Photo by Rick Goodfriend)

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