The invention relates to a system for tracking the location and activities of one more persons, such as prisoners, persons under house arrest or persons who have to perform community service.

The invention relates to a system for tracking the location and activities of one more persons, such as prisoners, persons under house arrest or persons who have to perform community service.

A portable device, for example an offender monitor, can utilize a location detector, such as a GPS receiver, to provide location information for the device. The portable device can utilize geofences in connection with managing device location and can communicate over a cellular network, for example using a radio to transmit location readings over the network. The location detector and the radio can draw power from an onboard battery. To conserve battery life, the rate of acquiring location readings can be adjusted according to distance between the device and a geofence of interest. For example, a GPS data acquisition rate can increase as the device approaches a geofence and decrease as the device moves away from the geofence.

Methods and systems for enhancing the detectability of electronic tracking messages are provided. Transmitters apply error protection encoding to the payload portion of messages to be transmitted. Transmitted messages are received by a satellite or other surveillance platform employing a compatible radio frequency receiver to collect message signals over a large area or great distance. Candidate messages are identified and the error protection encoding decoded to recover messages.

Methods and systems for enhancing the detectability of electronic tracking messages are provided. Transmitters apply error protection encoding to the payload portion of messages to be transmitted. Transmitted messages are received by a satellite or other surveillance platform employing a compatible radio frequency receiver to collect message signals over a large area or great distance. Candidate messages are identified and the error protection encoding decoded to recover messages.

A system of one or more computers can be configured to perform particular operations or actions by virtue of having software, firmware, hardware, or a combination of them installed on the system that in operation causes or cause the system to perform the actions. One general aspect includes a system, including a computer having a processor and a memory, the memory storing instructions executable by the processor such that the computer is programmed to receive an image of at least one lane marker from an image capture device mounted to a vehicle. The system also identifies a lane transition according to the image. The system can also control at least one of steering, braking, and acceleration of the vehicle according to a history of data concerning the lane transition locations.

Methods, devices, and systems for tracking an asset are provided. In particular, a device is provided that includes an array of sensors and communications modules configured to detect tracking information, including environmental conditions and physical events, and report the tracking information along with a geographical location of the device to a control server across a wireless network. Upon receiving the tracking information, the control server interprets the information and generates tracking reports for the device configured to be displayed to a graphical user interface of a third-party communication device.

Methods, devices, and systems for tracking an asset are provided. In particular, a device is provided that includes an array of sensors and communications modules configured to detect tracking information, including environmental conditions and physical events, and report the tracking information along with a geographical location of the device to a control server across a wireless network. Upon receiving the tracking information, the control server interprets the information and generates tracking reports for the device configured to be displayed to a graphical user interface of a third-party communication device.

A satellite signal receiving device includes a signal analyzing device and a processor; the signal analyzing device processes a received satellite signal to obtain first information, ands send the first information to the processor; the processor receives a security command and the first information and determines an information processing type for the received first information based on the security command; determines information to process in the first information when it is determined that the information processing type of the first information is the first processing type; sends the information to process and the security command to a security algorithm device, and obtains second information returned after the security algorithm device processed the first information based on the security command; and transmits the second information. Accordingly, when the first information requires security processing, the processor transmits the information after performing a security processing, thereby improving the security of the information.

A satellite signal receiving device includes a signal analyzing device and a processor; the signal analyzing device processes a received satellite signal to obtain first information, ands send the first information to the processor; the processor receives a security command and the first information and determines an information processing type for the received first information based on the security command; determines information to process in the first information when it is determined that the information processing type of the first information is the first processing type; sends the information to process and the security command to a security algorithm device, and obtains second information returned after the security algorithm device processed the first information based on the security command; and transmits the second information. Accordingly, when the first information requires security processing, the processor transmits the information after performing a security processing, thereby improving the security of the information.