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Klioner et al. have used the Gaia EDR3 data to directly measure the solarsystem's acceleration within the Milky Way using the apparent proper motions ofquasars. Here I show that this single absolute acceleration measurement incombination with relative accelerations obtained from pulsar orbital decayallows one to determine all of the parameters describing the dynamics of ourlocal Galactic environment, including the circular velocity at the Sun $V_0 =244 \pm 8$ km/s and its derivative $V'_0 = 2 \pm 9$ km/s/kpc, the local angularfrequency, the Oort constants, and the Sun's motion with respect to the LSR.This is the first determination of these parameters that only uses the generaltheory of relativity without the need for additional assumptions.

A purely acceleration-based measurement of the fundamental Galactic parameters