1. A system for observing a field of view, wherein the field of view comprises a plurality of potential target points, the system comprising: a transmitter; a detector, wherein a path is defined between the transmitter and the detector; wherein the transmitter generates electromagnetic (EM) energy into a transmit portion of the path; wherein the detector is positioned in a receive portion of the path defined by reflected EM energy from some of the target locations; and means for configuring at least a portion of the path such that a subset of the plurality of potential target points are included in the path.