Orbital Acceleration Research Experiment - Calibration measurements

Autor:	James R. Ritter, John Y. Nicholson, Kevin T. Larman, Robert C. Blanchard
Rok vydání:	1995
Předmět:	Physics Accuracy and precision Aerospace Engineering Accelerometer law.invention Acceleration Orbiter Space and Planetary Science law Range (statistics) Calibration Orbit (dynamics) Space Transportation System Remote sensing
Zdroj:	Journal of Spacecraft and Rockets. 32:619-626
ISSN:	1533-6794 0022-4650
DOI:	10.2514/3.26662
Popis:	The Orbital Acceleration Research Experiment (OARE), which has flown on STS-40, STS-50, and STS-58, contains a three-axis accelerometer with a single, nonpendulous, electrostatically suspended proofmass, which can resolve accelerations to the 10(sub -9) g level. The experiment also contains a full calibration station to permit in situ bias and scale-factor calibration. This on-orbit calibration capability eliminates the large uncertainty of ground-based calibrations encountered with accelerometers flown in the past on the Orbiter, and thus provides absolute acceleration measurement accuracy heretofore unachievable. This is the first time accelerometer scale-factor measurements have been performed on orbit. A detailed analysis of the calibration process is given, along with results of the calibration factors from the on-orbit OARE flight measurements on STS-58. In addition, the analysis of OARE flight-maneuver data used to validate the scale-factor measurements in the sensor's most sensitive range are also presented. Estimates on calibration uncertainties are discussed. These uncertainty estimates provides bounds on the STS-58 absolute acceleration measurements for future applications.
Databáze:	OpenAIRE
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