Systems and methods for sharing convergence data between GNSS receivers are disclosed. Convergence data received at a GNSS receiver via a communication connection may be utilized to determine a position of the GNSS receiver.

A method, apparatus, and system are disclosed for providing modified orbital assistance data to a mobile station to determine its location using global navigation satellite system (GNSS). The modified orbital assistance data may include predicted orbital information for the GNSS satellites combined with antenna phase center offset data for one or more GNSS satellites. The antenna phase center offset data may indicate an offset distance from the center of mass of the GNSS satellite to a position on an antenna of the respective GNSS satellite. The modified orbital assistance data may be in an earth-centered earth-fixed (ECEF) frame of reference and the antenna phase center offset data may be in a body-centered frame of reference.

Global Navigation Satellite System (GNSS) receivers can provide more accurate positioning when augmented using Real-Time Kinematic (RTK) or Differential GNSS (DGNSS) corrections. Techniques described herein leverage multi-constellation, multi-frequency (MCMF) measurements taken at a base station at first and second times to generate correction information that can be used to detect and correct a bias (or offset) in the location of the base station. This bias may be detected by a rover station, or by the base station itself.

The cellular device accesses a GPS/GNSS chipset embedded within the cellular device. The GPS/GNSS chipset calculates pseudorange information for use by the GPS/GNSS chipset. The cellular device extracts the pseudorange information from the GPS/GNSS chipset for use elsewhere in the cellular device outside of the GPS/GNSS chipset.

Among other things, an equipment for use on board a first ground transportation entity has (a) a receiver for information generated by a sensor of the environment of the first ground transportation entity, (b) a processor, and (c) a memory storing instructions executable by the processor to generate and send safety message information to a second ground transportation entity based on the information generated by the sensor.

Methods and apparatus are provided for calculating a pseudo-range and position in a global navigation satellite system receiver. A first pseudo-range of a satellite is calculated for position determination of the global navigation satellite system receiver. A second pseudo-range of the satellite is calculated for position correction of the global navigation satellite system receiver. A differential operation is performed using the first pseudo-range and the second pseudo-range to eliminate an error. A more precise pseudo-range of the satellite is calculated using the differential pseudo-range.

A system for providing a position for an agricultural vehicle. The system includes a first receiver structured to be coupled to a first vehicle, the first receiver configured to receive position correction information from an external source and determine a first position of the first receiver in three dimensions using the position correction information. The system also includes a second receiver structured to be coupled to a second vehicle and configured to determine a second position of the second receiver, wherein the first receiver is configured to determine the first position using the position correction information at a higher level of accuracy than the second receiver is configured to determine the second position. The system also includes one or more processing circuits, each processing circuit including a processor and a memory, the memory having instructions stored thereon that, when executed by the processor, cause the processing circuit to determine a position of the second vehicle in three dimensions, including a vertical position of at least a portion of the second vehicle, using the position correction information received by the first receiver.

A system or method for determining a satellite observation for a virtual reference station can include: determining a virtual reference station location, receiving a set of satellite observations at a reference station located at a reference station location, determining a first GNSS correction for the virtual reference station location and a second GNSS correction for the reference station location, and determining the satellite observation for the virtual reference station by combining the set of satellite observations, the first GNSS correction, and the second GNSS correction.

Embodiments of the invention provide that when performing a position fix a user who makes use of RTK or dGNSS correction data from a RTK/dGNSS service to obtain more accurate position fixes also receives from that same service data derived from the encrypted GNSS channels that authenticates whether the position fix determined by the mobile terminal based on the RTK/dGNSS data can be relied upon. By providing such an integrated service the mobile user terminal is able to obtain an authenticated, highly accurate positional fix which it can be certain can be relied upon.

The present disclosure includes devices, systems, and methods for communicating with unmanned aerial vehicles. In one embodiment, the present disclosure includes a server including a communication interface, a memory, and an electronic processor communicatively connected to the memory. The electronic processor is configured to communicate with one or more unmanned aerial vehicles via the communication interface and a satellite network, communicate with the one or more unmanned aerial vehicles via the communication interface and a terrestrial network, and communicate with the one or more unmanned aerial vehicles via the communication interface and a combination of the satellite network and the terrestrial network.