  We demonstrate combined high-fidelity long-haul transfer of a linearly
chirped, optical frequency and time transfer. In a proof-of-principle
experiment we transfer an optical frequency with a linear chirp of around 238
kHz/s via a phase-stabilized underground fiber link of 150 km. We find a
fractional frequency transfer instability (Allan deviation, 18000 s averaging
time) and simultaneity of the chirped frequency between both ends on a level of
around $2\times10^{-19}$, where the active phase stabilization suppresses
cumulative, symmetrical effects. In a second step, we demonstrate the remote
measurement of synchronisation taking advantage of chirped-frequency transfer.
The uncertainty of time transfer here is around 500 ps.
