With Target Tracking, a surveillance officer can determine where a target is as well as where a target has been. The contrast between live intelligence and historical evidence requires more than one way to interpret the data intercepted by Cellular Intercept Intelligence Analysis.
This means the results from the passive and active solutions of Target Tracking will vary based on the mission. For historical research, putting a criminal or terrorist at the scene of an event, the passive collection technology will be employed. Information analyzed will corroborate where someone was at the time they were either on a call, received a message, or just waited patiently while their phone was in the standby mode.
For real-time location, an active component would be able to work in conjunction with a surveillance team employing a direction finder and actively interrogating the target under the surveillance officer's 'network'.