I've just read in Eshleman et al 1977 Radio Science Investigations with Voyager that the voyagers have:
...a novel attitude-control thruster configuration that minimizes accelerations along the Earth-spacecraft line-of-sight;
I am guessing that the goal would be to minimize any tiny amount of delta-v that would affect doppler measurements of velocity, since there is so much science available in these precision measurements.
Does this just mean that the "novel attitude-control thruster configuration" is designed to balance the impulse from the thrusters used so that only torque is applied about the spacecraft center of mass? If so, how was this novel minimization accomplished?
If it doesn't, then what does it mean?