Introduction to Relativity in Geodesy

We start with the invariant speed of light, a fundamental constant that transcends reference frames. We delve into the Lorentz transformations, which connect coordinates between moving observers. Then we study the effects of time dilation and length contraction, where time stretches and rulers shrink at relativistic speeds. Next, we encounter the Minkowski metric, a four-dimensional canvas where spacetime intertwines. This review culminates in understanding invariant kinematics and dynamics, essential for unraveling geodesics. We provide a glimpse into Rindler coordinates, revealing the interplay of acceleration and gravity, essential to start on general relativity.