O. J. Sovers

• Observation model and parameter partials for the JPL geodetic GPS modeling software "GPSOMC"
• Observation model and parameter partials for the JPL VLBI parameter estimation software "MODEST", 1991
• Observation model and parameter partials for the JPL VLBI parameter estimation software "MODEST"--1994
• Observation model and parameter partials for the JPL VLBI parameter estimation software MASTERFIT, 1987