Individual directional antennas have to be manually or automatically turned to find the signal direction, which may be too slow when the signal is of short duration.

Traffic analysis

The study of who is signalling whom and in what quantity .When locations are known, usage patterns may emerge, and inferences drawn. Traffic analysis is the discipline of drawing patterns from information flow among a set of senders and receivers, whether those senders and receivers are designated by location determined through direction finding, by addressee and sender identifications in the message, or even MASINT techniques for "fingerprinting" transmitters or operators. Message content, other than the sender and receiver, is not necessary to do traffic analysis, although more information can be helpful.

Satellite identification system

A satellite identification system for identifying a communications satellite from which a broadcast communication signal is being received by an antenna, wherein the communication signal includes data identifying a programmer that broadcast the communication signal and/or an uplink location from which the communication signal is broadcast.

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