Murison continued work on the problem of extracting orbital information of a body obtained from incomplete state vector observations (with errors) made from a moving platform. This is in support of SAA ("Space Situational Awareness") issues involving MAPS and possibly the FTS projects. The first report, "Degradation of Error in the Longitudinal Coordinate of an Orbit from Astrometric Measurements" considers a simplified two-dimensional geometry in order to extract an analytical expression for the degradation with time of orbital longitude errors. However, the generalization to three dimensions in order to determine the orbit orientation angles (inclination, ascending node, argument of pericenter), as well as letting the orbit(s) be eccentric instead of circular, is analytically intractable. Murison is investigating various approximations (both geometric and small-parameter) that might lead to useful analytical results.

Murison continued work on the first paper of the orbit-orbit distance problem, but he didn't make much useful progress due to the SAA effort.

Murison continued assisting in the development of AA's new web site.

Murison continued his DDA duties, helping the LOC with various tasks in preparation for the 2006 DDA meeting.