OCAMS: The OSIRIS-REx Camera Suite
Abstract
The requirements-driven OSIRIS-REx Camera Suite (OCAMS) acquires images essential to collecting a sample from the surface of Bennu. During proximity operations, these images document the presence of satellites and plumes, record spin state, enable an accurate digital terrain model of the shape of the asteroid and identify any surface hazards. They confirm the presence of sampleable regolith on the surface, observe the sampling event itself, and image the sample head in order to verify its readiness to be stowed. They document the history of Bennu as an example of early solar system material, as a microgravity body with a planetesimal size-scale, and as a carbonaceous object. OCAMS is fitted with three cameras. The MapCam records point-source color images on approach to the asteroid in order to connect ground-based point-source observations of Bennu to later higher-resolution surface spectral imaging. The SamCam documents the sample site before, during, and after it is disturbed by the sample mechanism. The PolyCam, using its focus mechanism, observes the sample site at sub-centimeter resolutions, revealing surface texture and morphology. While their imaging requirements divide naturally between the three cameras, they preserve a strong degree of functional overlap. OCAMS and the other spacecraft instruments allow the OSIRIS-REx mission to collect a sample from a microgravity body on the same visit during which it was first optically acquired from long range, a useful capability as humanity explores near-Earth, Main-Belt and Jupiter Trojan asteroids.
Cite
@article{arxiv.1704.04531,
title = {OCAMS: The OSIRIS-REx Camera Suite},
author = {B. Rizk and C. Drouet d'Aubigny and D. Golish and C. Fellows and C. Merrill and P. Smith and M. S. Walker and J. E. Hendershot and J. Hancock and S. H. Bailey and D. DellaGiustina and D. Lauretta and R. Tanner and M. Williams and K. Harshman and M. Fitzgibbon and W. Verts and J. Chen and T. Connors and D. Hamara and A. Dowd and A. Lowman and M. Dubin and R. Burt and M. Whiteley and M. Watson and T. McMahon and M. Ward and D. Booher and M. Read and B. Williams and M. Hunten and E. Little and T. Saltzman and D. Alfred and S. O Dougherty and M. Walthall and K. Kenagy and S. Peterson and B. Crowther and M. L. Perry and C. See and S. Selznick and C. Sauve and M. Beiser and W. Black and R. N. Pfisterer and A. Lancaster and S. Oliver and C. Oquest and D. Crowley and C. Morgan and C. Castle and R. Dominguez and M. Sullivan},
journal= {arXiv preprint arXiv:1704.04531},
year = {2018}
}