Murison continued his analysis of an in-laboratory calibration method for the proposed Trex geodetic astrolabe. He simplified his earlier design and proved algebraically that that the retroreflector beam deviation tolerance sets the lower limit to the calibration accuracy. Using his ray tracing package AESOP (An Extensible Symbolic Optics Package), which uses the Maple computer algebra system, Murison tried to calculate the improvement due to spinning a misaligned retroreflector around a (slightly) misaligned axis, but the resulting complexity of the ray trace equations overwhelmed computational resources. A calibration in the field performed by rotating the astrolabe around a vertical axis, as proposed by Trex, might work, but there are questions about the effects of relaxing the assumptions of perfect geometry and alignment. A credible analysis of the field calibration idea remains to be done.

Murison spent time in his duty as Secretary of the AAS Division on Dynamical Astronomy.