A system measures the roughness of the ground surface over which an agricultural implement passes as measured in the direction of travel. The system includes at least one ground sensor attached to the agricultural implement that provides measurement of the distance to the ground. A controller is connected to the at least one ground sensor, and controls at least one adjustment of the agricultural implement. The at least one ground sensor provides instantaneous output based on the distance to the ground to the controller. The controller then calculates at least one statistical parameter from the instantaneous output. The at least one statistical parameter is calculated from variations in the distance to the ground in the direction of travel of the agricultural implement.

A system measures the roughness of the ground surface over which an agricultural implement passes as measured in the direction of travel. The system includes at least one ground sensor attached to the agricultural implement that provides measurement of the distance to the ground. A controller is connected to the at least one ground sensor, and controls at least one adjustment of the agricultural implement. The at least one ground sensor provides instantaneous output based on the distance to the ground to the controller. The controller then calculates at least one statistical parameter from the instantaneous output. The at least one statistical parameter is calculated from variations in the distance to the ground in the direction of travel of the agricultural implement.

A jobsite computer network has a local server connectable to a remote server via the internet, a network access transceiver connected to the local server, and a wireless device in wireless communication with the network access transceiver. The network access transceiver receives a message from the wireless device and sends a message to the local server. The local server utilizes information from the message to determine the location of the wireless device. The network access transceiver and/or the wireless device generate data which is sent to the remote server.

A jobsite computer network has a local server connectable to a remote server via the internet, a network access transceiver connected to the local server, and a wireless device in wireless communication with the network access transceiver. The network access transceiver receives a message from the wireless device and sends a message to the local server. The local server utilizes information from the message to determine the location of the wireless device. The network access transceiver and/or the wireless device generate data which is sent to the remote server.

Disclosed is a technology for increasing a positioning success rate and reducing a positioning error with high reliability by proposing an improved positioning scheme based on virtual satellites capable of improving DOP and removing an error in a satellite measurement value when a location of a terminal in an inadequate environment such as downtown/indoors near a window is measured.

Disclosed is a technology for increasing a positioning success rate and reducing a positioning error with high reliability by proposing an improved positioning scheme based on virtual satellites capable of improving DOP and removing an error in a satellite measurement value when a location of a terminal in an inadequate environment such as downtown/indoors near a window is measured.

The localization of a vehicle is determined using less expensive and computationally robust equipment compared to conventional methods. Localization is determined by estimating the position of a vehicle relative to a map of the environment, and the process thereof includes using a map of the surrounding environment of the vehicle, a model of the motion of the frame of reference of the vehicle (e.g., ego-motion), sensor data from the surrounding environment, and a process to match sensory data to the map. Localization also includes a process to estimate the position based on the sensor data, the motion of the frame of reference of the vehicle, and/or the map. Such methods and systems enable the use of less expensive components while achieving useful results for a variety of applications, such as autonomous vehicles.

Systems and methods for inertial navigation aided by signals of opportunity (SOOP). One system includes a network operations center (NOC), a reference station, and mobile user equipment. Another system includes a NOC and user equipment without a reference station. In the latter system, the NOC comprises an antenna, a NOC receiver that generates SOOP data derived from SOOP, a computer system that generates SOOP source location/ephemeris data and inter-source clock bias data based on SOOP data generated by the NOC receiver, and a communication device to broadcast the data. The user equipment comprises an antenna, a navigation receiver that generates SOOP data derived from SOOP detected by the antenna of the user equipment, and a navigation computer system that calculates a navigation solution, including a SOOP-derived estimated position of the user equipment, based on SOOP source location/ephemeris data and inter-source clock bias data broadcasted by the NOC and SOOP data generated by the navigation receiver.

The present disclosure relates generally to satellite communication systems, and, more particularly, to trilateration-based satellite location accuracy for improved satellite-based geolocation are provided. In one embodiment, a method comprises: determining, by a processing device, a location of each of a plurality of reference antennas with known locations; obtaining a plurality of distances between a communication satellite and the plurality of reference antennas, each distance of the plurality of distances corresponding to a respective reference antenna of the plurality of reference antennas, at least one distance of the plurality of distances based on an echo message communicated between a particular reference antenna of the plurality of reference antennas and the communication satellite; determining an accurate location of the communication satellite based on trilateration of the plurality of distances from the known locations of the plurality of reference antennas; and utilizing the accurate location of the communication satellite.

A method of enhancing the accuracy of a navigation system which includes a GNSS receiver. The method includes receiving navigation signals from at least one GNSS constellation and a LEO constellation. Position estimates will be made through implementation of a filter using successive readings of pseudoranges and carrier-phase measurements from the GNSS constellation and carrier-phase measurements from the LEO constellation.