Ground and In-Flight Calibration of the OSIRIS-REx Camera Suite.

Authors :: Golish DR
Drouet d'Aubigny C
Rizk B
DellaGiustina DN
Smith PH
Becker K
Shultz N
Stone T
Barker MK
Mazarico E
Tatsumi E
Gaskell RW
Harrison L
Merrill C
Fellows C
Williams B
O'Dougherty S
Whiteley M
Hancock J
Clark BE
Hergenrother CW
Lauretta DS
Source :: Space science reviews [Space Sci Rev] 2020; Vol. 216 (1), pp. 12. Date of Electronic Publication: 2020 Jan 23.
Publication Year :: 2020
Abstract: 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.<br /> (© The Author(s) 2020.)