TY - GEN
T1 - Osiris-rex navigation small force models
AU - Geeraert, Jeroen L.
AU - Leonard, Jason M.
AU - Kenneally, Patrick W.
AU - Antreasian, Peter G.
AU - Moreau, Michael C.
AU - Lauretta, Dante S.
N1 - Funding Information:
This material is based upon work supported by NASA under Contract NNG13FC02C and NNM1-0AA11C issued through the New Frontiers Program. Contributions were made by Christian W. May from Lockheed-Martin Space Systems and Patrick W. Kenneally from the University of Colorado at Boulder for the thermal analysis of the OSIRIS-REx spacecraft and SRP ray-tracing respectively, which enabled the OD team to model the thermal re-radiation and SRP accelerations. Dante Lauretta of the University of Arizona, Tucson, is the missions Principal Investigator, and the University of Arizona also leads the Science Team and the science observation planning and data processing. Lockheed Martin Space Systems in Denver built the spacecraft and is providing flight operations. Goddard Space Flight Center and KinetX Aerospace are responsible for navigating the OSIRIS-REx spacecraft.
Publisher Copyright:
© 2020, Univelt Inc. All rights reserved.
PY - 2020
Y1 - 2020
N2 - The Navigation Campaign of the NASA OSIRIS-REx mission consists of three phases: the Approach phase, Preliminary Survey phase, and the Orbital A phase. These phases spanned from August 2018 until February 28, 2019. The OSIRIS-REx spacecraft arrived at asteroid (101955) Bennu on December 3rd, 2018 thereby initiating the Preliminary Survey phase consisting of five 7-km altitude flybys of the asteroid. Orbit insertion followed on December 31st, 2018 commencing the Orbital A phase whereby the spacecraft’s average frozen orbit radius was less than 2 km. In this paper the small forces are presented that govern the spacecraft dynamics near the asteroid for the Navigation Campaign. These small forces include: solar radiation pressure, spacecraft thermal re-radiation, the antenna and LIDAR radiation pressure, and trending from desaturation maneuvers (desats). Extensive work on modeling these forces has enabled the navigation performance to exceed expectations and has reduced the stochastic accelerations below 1 x 10–12 km/s2 resulting in smaller trajectory predicted errors, essential for science planning of the mission.
AB - The Navigation Campaign of the NASA OSIRIS-REx mission consists of three phases: the Approach phase, Preliminary Survey phase, and the Orbital A phase. These phases spanned from August 2018 until February 28, 2019. The OSIRIS-REx spacecraft arrived at asteroid (101955) Bennu on December 3rd, 2018 thereby initiating the Preliminary Survey phase consisting of five 7-km altitude flybys of the asteroid. Orbit insertion followed on December 31st, 2018 commencing the Orbital A phase whereby the spacecraft’s average frozen orbit radius was less than 2 km. In this paper the small forces are presented that govern the spacecraft dynamics near the asteroid for the Navigation Campaign. These small forces include: solar radiation pressure, spacecraft thermal re-radiation, the antenna and LIDAR radiation pressure, and trending from desaturation maneuvers (desats). Extensive work on modeling these forces has enabled the navigation performance to exceed expectations and has reduced the stochastic accelerations below 1 x 10–12 km/s2 resulting in smaller trajectory predicted errors, essential for science planning of the mission.
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M3 - Conference contribution
AN - SCOPUS:85096497612
SN - 9780877036654
T3 - Advances in the Astronautical Sciences
SP - 931
EP - 946
BT - AAS/AIAA Astrodynamics Specialist Conference, 2019
A2 - Horneman, Kenneth R.
A2 - Scott, Christopher
A2 - Hansen, Brian W.
A2 - Hussein, Islam I.
PB - Univelt Inc.
T2 - AAS/AIAA Astrodynamics Specialist Conference, 2019
Y2 - 11 August 2019 through 15 August 2019
ER -