Attitude Estimation for a Flexible Spacecraft in an Unstable Spin Psiaki, Mark L. ; Klatt, Eric M. ; Kintner, Paul M., Jr. ; Powell, Steven P. Abstract Publication: Journal of Guidance Control Dynamics Pub Date: January 2002 DOI: 10.2514/2.4853 Bibcode: 2002JGCD...25...88P