Navigation Prediction Performance During OSIRIS-REx Proximity Operations at (101955) Bennu
AffiliationLunar and Planetary Laboratory, University of Arizona
MetadataShow full item record
CitationLeonard, J. M., Geeraert, J. L., Pelgrift, J. Y., Antreasian, P. G., Adam, C. D., Wibben, D. R., Getzandanner, K. M., Ashman, B. W., & Lauretta, D. S. (2022). Navigation Prediction Performance During OSIRIS-REx Proximity Operations at (101955) Bennu. AIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2022.
RightsThis material is declared a work of the U.S. Government and is not subject to copyright protection in the United States.
Collection InformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at firstname.lastname@example.org.
AbstractThe OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification and Security–Regolith Explorer) Orbit Determination team performed covariance analyses prior to the commencement of proximity operations (ProxOps) at (101955) Bennu to determine the expected predicted trajectory performance in order to meet trajectory knowledge requirements throughout each phase of the mission. One of the primary requirements placed on the predicted trajectory performance was based on the performance during orbital phases leading up to the maneuver to initiate the Touch-and-Go (TAG) trajectory descent. Throughout ProxOps the nominal force models being used to predict the spacecraft trajectory were updated in an effort to improve the prediction performance. The most significant models that contributed to prediction performance were of solar radiation pressure, thermal reradiation of the spacecraft, predicted attitude errors, and desaturation maneuvers. Efforts were made throughout all of ProxOps to monitor, trend, predict, and update spacecraft modeling to improve the prediction performance. These efforts were vital to reduce the spacecraft knowledge errors necessary to achieve a TAG target smaller than pre-launch analysis allowed due to the rough terrain of Bennu. Increased precision in predicted trajectory errors allowed for refined uncertainties to be used for future phase planning throughout the mission. The navigation team successfully predicted the spacecraft trajectory throughout all of ProxOps achieving predicted trajectories errors less than originally analyzed.
NotePublic domain article
VersionFinal published version
Except where otherwise noted, this item's license is described as This material is declared a work of the U.S. Government and is not subject to copyright protection in the United States.