Abstract
The Touch And Go Camera System (TAGCAMS) is a three-camera-head instrument onboard NASA’s OSIRIS-REx asteroid sample return mission spacecraft. The purpose of TAGCAMS is to facilitate navigation to the target asteroid, (101955) Bennu; confirm acquisition of the asteroid sample; document asteroid sample stowage; and provide supplementary imaging for OSIRIS-REx science investigations.
During the almost two-year OSIRIS-REx outbound cruise phase we pursued nine TAGCAMS imaging campaigns to check, calibrate and characterize the camera system’s performance before asteroid arrival and proximity operations began in late 2018. The TAGCAMS in-flight calibration dataset provides the relevant information to enable the three cameras to complete their primary observation goals during asteroid operations. The key performance parameters that we investigated in flight included: linearity, responsivity (both point source and extended body), dark current, hot pixels, pointing, image geometry transformation, image quality and stray light. Analyses of the in-flight performance either confirmed the continued applicability of the TAGCAMS ground test results or substantially improved upon the ground test knowledge. In addition, the TAGCAMS calibration observations identified the source of a spacecraft outgassing feature that guided successful remediation efforts prior to asteroid arrival.
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Acknowledgements
We acknowledge the tremendous efforts of the entire OSIRIS-REx team, past and present, that supported us in the planning, acquisition and return to Earth of the TAGCAMS in-flight calibration dataset. It has proven to be extremely useful in planning our TAGCAMS asteroid operations. This material is based upon work supported by NASA under Contracts NNM10AA11C, NNG12FD66C and NNG13FC02C issued through the New Frontiers Program.
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Bos, B.J., Nelson, D.S., Pelgrift, J.Y. et al. In-Flight Calibration and Performance of the OSIRIS-REx Touch And Go Camera System (TAGCAMS). Space Sci Rev 216, 71 (2020). https://doi.org/10.1007/s11214-020-00682-x
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DOI: https://doi.org/10.1007/s11214-020-00682-x