# OBSERVATION¶

Sets up an observation point(s) within the problem domain.

OBSERVATION
REGION <region_name>
VELOCITY
AT_CELL_CENTER
AT_COORDINATE
END


Where:

• <region_name>: the name of a region specified in the input deck, (i.e. a point or an array of points within the reservoir domain) where the observation is placed.

• VELOCITY: if included prints the cell centered velocities for the cells being observed

• AT_CELL_CENTER: if included specifies that the observation data is sampled at center of cell intersected by observation (default).

• AT_COORDINATE: if included the observation data is interpolated (linearly) from neighboring cell centers to coordinate

See example below:

OBSERVATION
REGION inj1
/