1. Orion Absolute Navigation System Progress and Challenges
2. 2C.Hanak, “NVA EKF CSUMemo,” Tech.Rep.LockheedMartinMemono.CEV-GNC-11-59.Revision1.6, January2013.
3. 3C. Hanak, “NVA FILTNAV CSU Memo,” Tech. Rep. Lockheed Martin Memo no. CEV-GNC-11-60. Revision 1.6, January 2013.
4. 4C. D’Souza and C. Hanak, “A Primer on the Orion Absolute Navigation UDU Filter,” Tech. Rep. EG Technical Brief no. EG-DIV-11-24, February 2011.