As "Space Mobility and Logistics" was listed as one of the five core
competencies in the US Space Force's doctrine document, there is a growing
interest in developing technologies to enable in-space refueling, servicing,
assembly, and manufacturing as well as other in-space logistics operations.
Modeling for space mobility and logistics requires a new approach that differs
from conventional astrodynamics because it needs to consider the coordination
of multiple vehicles to satisfy an overall demand; namely, the optimal
trajectory of one vehicle does not necessarily lead to the optimal campaign
solution that contains multiple vehicles and infrastructure elements. In
addition, for in-space servicing applications, we need additional analysis
capabilities to analyze and optimize the sizes of the fuel/spare depots and
their inventory/sparing policies with orbital mechanics in mind. To tackle
these challenges, there have been various attempts to leverage terrestrial
logistics-driven techniques, coupled with astrodynamics, to enhance in-space
operations; an earlier primary domain of interest was refueling and resource
utilization for human space exploration, and more recent studies focus on
in-space servicing, in-space manufacturing, and mega-scale constellations. This
paper aims to provide a review of the literature by categorizing the
state-of-the-art studies in two ways: (1) by application questions that are
addressed; and (2) by logistics-driven methods that are used in the studies.
The two categorizations are expected to help both practitioners and researchers
understand the state of the art and identify the under-explored and promising
future research directions.Comment: Submitted to AIAA SciTech Conference 202