Power can be preserved in a tracking device equipped with a GPS receiver and a transceiver by evaluating the proximity of the tracking device to a mobile device and enabling the GPS receiver and transceiver only in the event that the tracking device is out of the range of the mobile device. Once enabled, the location of the tracking device can be determined based on location information received from the GPS receiver. The determined location can be provided to a tracking system associated with the tracking device. The tracking system can then inform an owner of the tracking device of the determined location. Once the tracking device has been found, the GPS receiver and the transceiver can be disabled to save additional power.

Power can be preserved in a tracking device equipped with a GPS receiver and a transceiver by evaluating the proximity of the tracking device to a mobile device and enabling the GPS receiver and transceiver only in the event that the tracking device is out of the range of the mobile device. Once enabled, the location of the tracking device can be determined based on location information received from the GPS receiver. The determined location can be provided to a tracking system associated with the tracking device. The tracking system can then inform an owner of the tracking device of the determined location. Once the tracking device has been found, the GPS receiver and the transceiver can be disabled to save additional power.

A signal generation system for signal simulation includes at least one data input, a pulse description word generator, a multi-frequency signal generator, and at least one radio frequency output. The multi-frequency signal generator is configured to simulate a multi-frequency global navigation satellite system signal. The pulse description word generator and the multi-frequency signal generator are assigned to the data input in order to process data received via the data input. The pulse description word generator and the multi-frequency signal generator are configured to generate an output signal based on at least one instruction for a certain generator behavior of the pulse description word generator and/or the multi-frequency signal generator. The at least one instruction is encompassed in the data received. Further, a method of signal generation is described.

A global positioning system (GPS) registration tool (GRT) is provided that is configured to register GPS coordinates of a streetlight controller (SLC) during installation of the SLC at a light fixture and store the GPS coordinates of the SLC at the SLC. Related systems, methods and computer program products are also provided.

A global positioning system (GPS) registration tool (GRT) is provided that is configured to register GPS coordinates of a streetlight controller (SLC) during installation of the SLC at a light fixture and store the GPS coordinates of the SLC at the SLC. Related systems, methods and computer program products are also provided.

An active sensor for performing active measurements of a scene is presented. The active sensor includes at least one transmitter configured to emit light pulses toward at least one target object in the scene, wherein the at least one target object is recognized in an image acquired by a passive sensor; at least one receiver configured to detect light pulses reflected from the at least one target object; a controller configured to control an energy level, a direction, and a timing of each light pulse emitted by the transmitter, wherein the controller is further configured to control at least the direction for detecting each of the reflected light pulses; and a distance measurement circuit configured to measure a distance to each of the at least one target object based on the emitted light pulses and the detected light pulses.

An active sensor for performing active measurements of a scene is presented. The active sensor includes at least one transmitter configured to emit light pulses toward at least one target object in the scene, wherein the at least one target object is recognized in an image acquired by a passive sensor; at least one receiver configured to detect light pulses reflected from the at least one target object; a controller configured to control an energy level, a direction, and a timing of each light pulse emitted by the transmitter, wherein the controller is further configured to control at least the direction for detecting each of the reflected light pulses; and a distance measurement circuit configured to measure a distance to each of the at least one target object based on the emitted light pulses and the detected light pulses.

Disclosed is representing distant objects for analysis of satellite line-of-sight visibility from a grid of points by constructing a first 3D model of foreground objects that obscure line-of-sight visibility of satellites from a grid of points, wherein the first 3D model is at a first resolution, where spacing of grid points denotes obstruction edges, constructing a second 3D model of background objects that are more than a threshold distance away and that object obscure line-of-sight visibility of satellites from the grid of points, wherein the second 3D model is at a second resolution that is different from and coarser than the first resolution, calculating a line-of-sight visibility of the satellites from the grid of points using a combination of the first and second 3D models, and responding to a query for an area by providing the calculated line-of-sight visibility of the satellites for points of the grid within the area.

Ocean-based gear equipped with Global Positioning System (GPS) shares position to either single or multiple users. Position data from an ocean-based device are sent either to a cloud-hosted database or vessel transceiver, then displayed on either a mobile app via multiple login accounts, a vessel-mounted GPS plotter that is capable of sharing data over the internet, or a satellite-connected mobile device capable of receiving and displaying Short Message Service (SMS) messages or emails. The Vessel Transceiver device is designed to share data from gear to vessel via radio frequency, as well as vessel to vessel via satellite network, without internet connectivity. Position data are provided to either one user or multiple users on the ocean or on land via various communication arrangements.

Ocean-based gear equipped with Global Positioning System (GPS) shares position to either single or multiple users. Position data from an ocean-based device are sent either to a cloud-hosted database or vessel transceiver, then displayed on either a mobile app via multiple login accounts, a vessel-mounted GPS plotter that is capable of sharing data over the internet, or a satellite-connected mobile device capable of receiving and displaying Short Message Service (SMS) messages or emails. The Vessel Transceiver device is designed to share data from gear to vessel via radio frequency, as well as vessel to vessel via satellite network, without internet connectivity. Position data are provided to either one user or multiple users on the ocean or on land via various communication arrangements.