Abstract: In a method of autonomous orbit projection performed within a Global Navigation Satellite System (GNSS) receiver, distinct broadcast orbits are received over time from a GNSS satellite during operation of the GNSS receiver. A plurality of the distinct broadcast orbits are stored within the GNSS receiver. Within the GNSS receiver, a plurality of the stored broadcast orbits are converted into a time series of range data for the GNSS satellite. A projected orbit for the GNSS satellite is determined by utilizing the time series of range data as an input to an orbit projector of the GNSS receiver.

Abstract: In a method of autonomous orbit projection performed within a Global Navigation Satellite System (GNSS) receiver, distinct broadcast orbits are received over time from a GNSS satellite during operation of the GNSS receiver. A plurality of the distinct broadcast orbits are stored within the GNSS receiver. Within the GNSS receiver, a plurality of the stored broadcast orbits are converted into a time series of range data for the GNSS satellite. A projected orbit for the GNSS satellite is determined by utilizing the time series of range data as an input to an orbit projector of the GNSS receiver.

Abstract: In a method of conveying information regarding an orbit used at a Global Navigation Satellite System (GNSS) base station to a GNSS receiver, a satellite position is determined for a particular time from an orbit of a GNSS satellite. An ambiguity value is extracted from the satellite position. The ambiguity value is extracted based upon a satellite position determination margin of error of a GNSS receiver. The ambiguity value is encoded into an encoded ambiguity value which is assembled into a message. The message also includes a time tag representing the particular time. The message is transmitted from the GNSS base station. The encoded ambiguity value and the time tag convey information regarding the orbit to a GNSS receiver in receipt of the message.

Abstract: In method of correcting for drift in a Global Navigation Satellite System (GNSS) receiver, a broadcast orbit in use at the GNSS receiver is nudged based on a first message received from a GNSS base station. The nudging creates a first nudged broadcast orbit for a GNSS satellite, the first nudged broadcast orbit being more precise than the broadcast orbit. A second message is received from the GNSS base station. Information included in the second message is employed to determine a drift rate of the first nudged broadcast orbit relative to a more precise orbit in use at the GNSS base station. Based upon the second message, the broadcast orbit is nudged to create a second nudged broadcast orbit for the GNSS satellite. A component of the drift rate is corrected for, relative to the second nudged broadcast orbit.

Abstract: In method of correcting for drift in a Global Navigation Satellite System (GNSS) receiver, a broadcast orbit in use at the GNSS receiver is nudged based on a first message received from a GNSS base station. The nudging creates a first nudged broadcast orbit for a GNSS satellite, the first nudged broadcast orbit being more precise than the broadcast orbit. A second message is received from the GNSS base station. Information included in the second message is employed to determine a drift rate of the first nudged broadcast orbit relative to a more precise orbit in use at the GNSS base station. Based upon the second message, the broadcast orbit is nudged to create a second nudged broadcast orbit for the GNSS satellite. A component of the drift rate is corrected for, relative to the second nudged broadcast orbit.

Abstract: In a method of conveying information regarding an orbit used at a Global Navigation Satellite System (GNSS) base station to a GNSS receiver, a satellite position is determined for a particular time from an orbit of a GNSS satellite. An ambiguity value is extracted from the satellite position. The ambiguity value is extracted based upon a satellite position determination margin of error of a GNSS receiver. The ambiguity value is encoded into an encoded ambiguity value which is assembled into a message. The message also includes a time tag representing the particular time. The message is transmitted from the GNSS base station. The encoded ambiguity value and the time tag convey information regarding the orbit to a GNSS receiver in receipt of the message.