The IMPI Blue Force Tracking Device is a multi purpose micro processor controlled GPS tracking modem providing a wide range of communications capabilities in either a secure military tactical environment or in a civilian environment. The IMPI position is relayed to a computer system in a mobile, deployable of static control room, via GPRS or an Iridium Satellite Communication link. This position can then be plotted and shown on a geographical map display.

 Detailed Specification (PDF 272kb)

The communications data carrier for the position relay is determined via a "least-cost" mechanism, meaning that the GPRS data channel of the available GSM network will automatically be selected if available. Should no GMS network coverage be available, the IMPI positional update will automatically be routed via the Iridium satellite network. This means that IMPI provides positional updates from any geographic position on earth, to any designated control system.

As these positional updates (GPRS or Iridium) will be relayed via the Internet, data security can be ensured by encryption according to user specifications / requirements. IMPI offers an electronic interface for the integration of PDA / PCbased computer. Extensive mapping, messaging and situational awareness functionality can be added as per user requirement. IMPI can be used with Tactical Radios utilising the Inline Data Communication Unit (IDCU) from SAAB. This interface can be customised as per user requirement and specific radio functionality. IMPI utilizes three types of communication mediums: Tactical Radios, GSM and Satellite Communication. (It follows "least cost routing"-depending on the availability of the medium). The "update-rate" can be adjusted "on-the-fly" from the base station.

 Key Features:

·        Supports AT (Attention) commands in modem mode.

·        Provides NMEA (National Marine Electronics Association) ASCII strings for GPS info on external port.

·        Encrypted data messages (track and status information) to host server

·        Supports client unique requirements:

·        Supports Tactical Data Link (TDL) message formats for track messages.

·        Supports GTI (General Transfer Interface) when interfacing with TDL compliant communication devices

·        Routes messages from external computing device to communication devices.

·        Supports Link Control Functionality.

·        Although IMPI has a rechargeable internal battery it can be coupled to an external power source. The battery is rechargeable from a 100V-240V AC power source as well as from a 12V-32V DC power source (via battery clamps, vehicle sigarette lighter etc.)

Source: http://www.gc-sat.com/impi-gprs.html