February 16, 2026 D. Arnas, R. Linares “Approximate Analytical Solution to the Zonal Harmonics Problem Using Koopman Operator Theory” Journal of Guidance Control and Dynamics [07315090] 44.11 (2021): 1909-1923. Print. Share this 44.11 (2021): 1909-1923. Print."] Related Stories See all news How MIT’s 10th president shaped the Cold War AeroAstro sophomores tour the east coast aerospace industry during IAP 2026 See all news