D. R. Golish , 1 , C. Drouet d’Aubigny 1 , B. Rizk 1 , D. N. DellaGiustina 1 , P. H. Smith 1 , K. Becker 1 , N. Shultz 1 , T. Stone 2 , M. K. Barker 3 , E. Mazarico 3 , E. Tatsumi 4 , R. W. Gaskell 5 , L. Harrison 1 , C. Merrill 1 , C. Fellows 1 , B. Williams 1 , S. O’Dougherty 1 , M. Whiteley 6 , J. Hancock 6 , B. E. Clark 7 , C. W. Hergenrother 1 , D. S. Lauretta 1
23 January 2020
The OSIRIS-REx Camera Suite (OCAMS) onboard the OSIRIS-REx spacecraft is used to study the shape and surface of the mission’s target, asteroid (101955) Bennu, in support of the selection of a sampling site. We present calibration methods and results for the three OCAMS cameras—MapCam, PolyCam, and SamCam—using data from pre-flight and in-flight calibration campaigns. Pre-flight calibrations established a baseline for a variety of camera properties, including bias and dark behavior, flat fields, stray light, and radiometric calibration. In-flight activities updated these calibrations where possible, allowing us to confidently measure Bennu’s surface. Accurate calibration is critical not only for establishing a global understanding of Bennu, but also for enabling analyses of potential sampling locations and for providing scientific context for the returned sample.