Share Email Print
cover

Proceedings Paper

SEL2 servicing: increased science return via on-orbit propellant replenishment
Author(s): Benjamin B. Reed; Keith DeWeese; Michael Kienlen; Thomas Aranyos; Joseph Pellegrino; Charles Bacon; Atif Qureshi
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Spacecraft designers are driving observatories to the distant Sun-Earth Lagrange Point 2 (SEL2) to meet ever-increasing science requirements. The mass fraction dedicated to propellant for these observatories to reach and operate at SEL2 will be allocated with the upmost care, as it comes at the expense of optics and instrument masses. As such, these observatories could benefit from on-orbit refueling, allowing greater dry-to-wet mass ratio at launch and/or longer mission life. NASA is developing technologies, capabilities and integrated mission designs for multiple servicing applications in low Earth orbit (LEO), geosynchronous Earth orbit (GEO) and cisluner locations. Restore-L, a mission officially in formulation, will launch a free-flying robotic servicer to refuel a government-owned satellite in LEO by mid 2020. This paper will detail the results of a point design mission study to extend Restore-L servicing technologies from LEO to SEL2. This SEL2 mission would launch an autonomous, robotic servicer spacecraft equipped to extend the life of two space assets through refueling. Two space platforms were chosen to 1) drive the requirements for achieving SEL2 orbit and rendezvous with a spacecraft, and 2) to drive the requirements to translate within SEL2 to conduct a follow-on servicing mission. Two fuels, xenon and hydrazine, were selected to assess a multiple delivery system. This paper will address key mission drivers, such as servicer autonomy (necessitated due to communications latency at L2). Also discussed will be the value of adding cooperative servicing elements to the client observatories to reduce mission risk.

Paper Details

Date Published: 29 July 2016
PDF: 16 pages
Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99041N (29 July 2016); doi: 10.1117/12.2231290
Show Author Affiliations
Benjamin B. Reed, NASA Goddard Space Flight Ctr. (United States)
Keith DeWeese, NASA Goddard Space Flight Ctr. (United States)
Michael Kienlen, NASA Goddard Space Flight Ctr. (United States)
Thomas Aranyos, NASA Kennedy Space Ctr. (United States)
Joseph Pellegrino, Orbital ATK (United States)
Charles Bacon, Orbital ATK (United States)
Atif Qureshi, Jackson and Tull (United States)


Published in SPIE Proceedings Vol. 9904:
Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave
Howard A. MacEwen; Giovanni G. Fazio; Makenzie Lystrup; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

© SPIE. Terms of Use
Back to Top