Abstract After on-orbit failure of its magnetometer and all torque rods, the NEOSSat microsatellite has recovered operations through the use of novel attitude determination and control algorithms. Attitude determination without the magnetometer was restored through the creation of a new attitude sensor from onboard GPS sensors. Desaturation without the torque rods was achieved through an innovative new control mode to orient the satellite’s internal residual dipole for optimal momentum dumping. Now operational based on a minimal sensor and actuator suite, NEOSSat has regained the performance necessary to accomplish its space surveillance missions with only a modest duty cycle reduction and adjustments to spacecraft operation planning. This paper, summarizing the NEOSSat mission and the unique flight software upgrades that enabled its recovery, expands the body of knowledge in GPS-based attitude determination and momentum management strategies for satellites.
Resurrecting NEOSSat: How Innovative Flight Software Saved Canada’s Space Telescope
01.01.2019
25 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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