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GRAIL TCM-5 Go/No-Go: Developing Lunar Orbit Insertion CriteriaThe Gravity Recovery and Interior Laboratory (GRAIL) mission successfully completed mapping the Moon's gravity field to an unprecedented level. The mission success was critically dependent on the success of the Lunar Orbit Insertion (LOI). It was somewhat unfamiliar as it involved an elliptical approach from a low-energy trans-lunar cruise trajectory via Sun-Earth three-body region rather than a more conventional hyperbolic approach from a direct Earth-to-Moon transfer. In addition, how its delivery dispersion affected the science formation of the two spacecraft was not well understood. In this paper we establish a set of LOI criteria to meet all the requirements and we use these criteria to establish Go/No-Go boundaries of the last, statistical Trajectory Correction Maneuvers (TCM-5s) for operations. In the end both spacecraft were found to be within the established boundaries and TCM-5s of both spacecraft were cancelled.
Document ID
20150008684
Document Type
Conference Paper
External Source(s)
Authors
Chung, Min-Kun J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
May 21, 2015
Publication Date
August 11, 2013
Subject Category
Lunar and Planetary Science and Exploration
Report/Patent Number
AAS 13-712
Meeting Information
AAS/AIAA Astrodynamics Specialist Conference(Hilton Head, SC)
Distribution Limits
Public
Copyright
Other