Problem 2.

For the geometry presented in Figure and using equation () show that the reflection point displacement measured along the reflector is

$${\bf OR}= { {h^2 \over {t_{cmp}}} 2 \sin \theta \cos \theta}$$

where t_cmp is the traveltime from the CMP location (point F) to the reflector and back (or the segment FG in time units). The length of the segment FG is given in equation (). This equation appears in Levin's (1971) classic paper, and is also the first equation Dave Hale uses when explaining DMO in his SEG course notes.