No, Pulsar timing is not typically used to measure deviations in the Earth's geodesic or detect large planetary bodies in the remote solar system. Pulsar timing is a technique used to study pulsars, which are highly magnetized, rotating neutron stars that emit beams of electromagnetic radiation.
Pulsar timing involves precisely measuring the arrival times of pulses from pulsars over long periods of time. By monitoring the timing of these pulses, astronomers can study the properties of the pulsars themselves, such as their rotation rate, stability, and any irregularities or variations in their signals. Pulsar timing is often used to detect gravitational waves, study the effects of gravitational interactions, and search for planets around pulsars.
To detect large planetary bodies in the remote solar system or measure deviations in the Earth's geodesic caused by such bodies, other observational methods are typically employed. These methods include telescopic observations, astrometry, and gravitational perturbation analyses. These techniques involve directly observing celestial objects, analyzing their positions, orbits, and gravitational effects on other objects, and using mathematical models to infer the presence and properties of distant planetary bodies.
It's worth noting that the discovery of large planetary bodies in the remote solar system, such as Pluto, Eris, and other dwarf planets, has been achieved through dedicated telescopic surveys and observational campaigns rather than pulsar timing.