OSIRIS-REx Camera Suite (OCAMS)

OSIRIS-REx Camera Suite (OCAMS)
Name	OSIRIS-REx Camera Suite (OCAMS)
Operator	NASA / University of Arizona
Mission	OSIRIS-REx
Launch	2016
Manufacturer	Malin Space Science Systems / University of Arizona
Type	Optical imaging system
Wavelength	Visible / near-infrared
Mass	8.8 kg
Power	28 W
Resolution	< 0.1 m (at closest approach)

OSIRIS-REx Camera Suite (OCAMS) is the trio of imaging cameras that served as the primary optical system for the OSIRIS-REx asteroid sample-return mission to 101955 Bennu. Designed and led by teams at the University of Arizona and Malin Space Science Systems, OCAMS provided navigation, mapping, and scientific imaging from cruise through sample acquisition and return planning. The suite's instruments supported operations that connected mission planning at NASA Goddard Space Flight Center with sample-capture execution by the Touch-and-Go Sample Acquisition Mechanism (TAGSAM), enabling contextual interpretation by planetary scientists across institutions such as the Smithsonian Institution and Lunar and Planetary Institute.

Overview

OCAMS comprised three complementary cameras designated to fulfill reconnaissance, proximity navigation, and sample-site documentation roles during the OSIRIS-REx mission that departed Earth in 2016. It enabled detailed photogrammetry, photometric modeling, and color mapping that tied together remote-sensing campaigns led by teams at NASA Johnson Space Center, Jet Propulsion Laboratory, and the University of Colorado Boulder. OCAMS imagery fed into shape models developed by collaborators at the California Institute of Technology and validated by researchers associated with the Natural History Museum, London. The instrument suite's operation intersected with mission milestones including the Earth gravity assist (2017) and the asteroid proximity operations around 101955 Bennu culminating in the Touch-and-Go Sample Acquisition Mechanism event.

Instrument Design and Components

OCAMS consisted of three distinct cameras named for their functions: a wide-field context imager, a detailed polyfunctional imager, and a high-resolution narrow-angle imager, each integrating optical assemblies, focal-plane arrays, and electronics derived from heritage at Malin Space Science Systems and the University of Arizona imaging laboratories. The optical designs drew upon lens and detector techniques refined in instruments such as HiRISE, Mastcam, and the NAVCAM systems used on missions like Mars Science Laboratory and Rosetta. Electronics and thermal engineering collaborated with teams at Ball Aerospace and Lockheed Martin Space to meet spacecraft integration at NASA Goddard Space Flight Center. Components included radiation-tolerant imagers tested against standards used for Hubble Space Telescope instruments and calibration approaches consistent with New Horizons and Dawn camera suites.

Mission Operations and Observations

Throughout cruise, approach, and proximity operations, OCAMS supported mission navigation efforts coordinated with NASA Deep Space Network tracking and optical navigation specialists from University of Arizona and MIT. The cameras produced mosaics, stereophotogrammetric datasets, and time-series imagery used by science teams across Brown University, University of Washington, and Cornell University to assess surface morphology, regolith distribution, and ejection events. OCAMS contributed images used during the selection of primary and backup sample sites alongside teams from Carnegie Institution for Science and Southwest Research Institute. During close approach and the TAG event, OCAMS documented contact dynamics that were analyzed by investigators at Arizona State University and University of California, Los Angeles.

Data Processing and Calibration

Raw OCAMS data passed through processing pipelines at facilities including the Planetary Data System nodes and the University of Arizona Instrument Laboratories, where teams applied radiometric calibration, flat-field correction, and geometric rectification. Calibration campaigns referenced standards from National Institute of Standards and Technology and cross-calibrations with instruments such as OVIRS and OCS on the same spacecraft and with datasets from Hayabusa2 and NEAR Shoemaker. Processing workflows were managed by software groups at Southwest Research Institute and USGS Astrogeology Science Center, producing Digital Terrain Models used by navigation teams at Lockheed Martin Space and science modelers at Caltech.

Scientific Results and Contributions

OCAMS imagery enabled characterization of 101955 Bennu's geology, revealing a rubble-pile structure, boulder-strewn surface, and particle plumes that energized studies at institutions including University of Chicago and Massachusetts Institute of Technology. High-resolution sequences informed spectral-context analyses together with teams at University of Hawaiʻi and Brown University, linking surface color units to laboratory studies at Smithsonian Institution and University of Arizona's spectroscopy labs. OCAMS-supported shape models and photometric analyses contributed to publications by researchers at Northwestern University, Purdue University, and Pennsylvania State University exploring Yarkovsky-driven orbital evolution and the asteroid's thermal properties studied by groups at University of Tennessee and University of Bern.

Development and Testing

OCAMS development followed design, fabrication, and verification phases coordinated among the University of Arizona imaging laboratories, Malin Space Science Systems, and test facilities at NASA Kennedy Space Center and NASA Goddard Space Flight Center. Environmental testing included thermal vacuum and vibration campaigns analogous to those used for Mars Reconnaissance Orbiter and Cassini–Huygens instruments, overseen by engineers from Lockheed Martin Space and Ball Aerospace. Optical alignment and end-to-end radiometric performance were validated using standards from National Institute of Standards and Technology and testbeds utilized in projects at Jet Propulsion Laboratory and Caltech.

Heritage and Future Applications

OCAMS built upon imaging heritage from missions such as NEAR Shoemaker, Hayabusa, Hayabusa2, and Dawn, while influencing camera designs for future sample-return and small-body missions coordinated by agencies like NASA, European Space Agency, and Japan Aerospace Exploration Agency. Lessons from OCAMS operations and OCAMS-driven science have informed instrument proposals at institutions including Cornell University and MIT, and technology transfer to commercial ventures collaborating with SpaceX and Blue Origin for planetary payloads. OCAMS legacy persists in datasets archived in the Planetary Data System and in methodology adopted by future missions studying small bodies, cometary nuclei, and planetary satellites such as those investigated by teams at European Space Agency and Canadian Space Agency.

Category:Spacecraft instruments Category:Space imaging systems