Reducing Time and Increasing Reliability of Ambiguity Resolution in GNSS

An apparatus for processing global navigation satellite system (GNSS) signals, the apparatus comprising:

• a processor;
• memory operably coupled to the processor;
• and
• a data storage device operably coupled to the processor, wherein the data storage device stores computer program instructions, which, when executed by the processor, cause the processor to perform a method comprising the steps of:
• receiving a first plurality of first differences of carrier phase measurements, wherein the first plurality of first differences of carrier phase measurements is based at least in part on GNSS signals received by a rover from a first plurality of GNSS satellites at a first measurement epoch and GNSS signals received by a base from the first plurality of GNSS satellites at the first measurement epoch;
• resolving a plurality of first differences of carrier phase ambiguities of the first plurality of first differences of carrier phase measurements;
• computing a first fixed position of the rover, wherein the first fixed position of the rover is based at least in part on the plurality of first differences of carrier phase ambiguities of the first plurality of first differences of carrier phase measurements;
• and
• computing a first plurality of sub-corrections, wherein the first plurality of sub-corrections is based at least in part on the first fixed position of the rover, a position of the base, a position of each specific GNSS satellite in the first plurality of GNSS satellites, the first plurality of first differences of carrier phase measurements, and the plurality of first differences of carrier phase ambiguities of the first plurality of first differences of carrier phase measurements.

A computer readable medium storing computer program instructions for processing global navigation satellite system (GNSS) signals, wherein the computer program instructions, when executed by a processor, cause the processor to perform a method comprising the steps of:

• receiving a first plurality of first differences of carrier phase measurements, wherein the first plurality of first differences of carrier phase measurements is based at least in part on GNSS signals received by a rover from a first plurality of GNSS satellites at a first measurement epoch and GNSS signals received by a base from the first plurality of GNSS satellites at the first measurement epoch;
• resolving a plurality of first differences of carrier phase ambiguities of the first plurality of first differences of carrier phase measurements;
• computing a first fixed position of the rover, wherein the first fixed position of the rover is based at least in part on the plurality of first differences of carrier phase ambiguities of the first plurality of first differences of carrier phase measurements;
• and
• computing a first plurality of sub-corrections, wherein the first plurality of sub-corrections is based at least in part on the first fixed position of the rover, a position of the base, a position of each specific GNSS satellite in the first plurality of GNSS satellites, the first plurality of first differences of carrier phase measurements, and the plurality of first differences of carrier phase ambiguities of the first plurality of first differences of carrier phase measurements.

A method for processing global navigation satellite system (GNSS) signals, the method comprising the steps of:

• receiving a first plurality of second differences of carrier phase measurements, wherein the first plurality of second differences of carrier phase measurements is based at least in part on GNSS signals received by a rover from a first plurality of GNSS satellites at a first measurement epoch and GNSS signals received by a base from the first plurality of GNSS satellites at the first measurement epoch;
• resolving a plurality of second differences of carrier phase ambiguities of the first plurality of second differences of carrier phase measurements;
• computing a first fixed position of the rover, wherein the first fixed position of the rover is based at least in part on the plurality of second differences of carrier phase ambiguities of the first plurality of second differences of carrier phase measurements;
• and
• computing a first plurality of sub-corrections, wherein the first plurality of sub-corrections is based at least in part on the first fixed position of the rover, a position of the base, a position of each specific GNSS satellite in the first plurality of GNSS satellites, and the first plurality of second differences of carrier phase measurements.

An apparatus for processing global navigation satellite system (GNSS) signals, the apparatus comprising:

• a processor;
• memory operably coupled to the processor;
• and
• a data storage device operably coupled to the processor, wherein the data storage device stores computer program instructions, which, when executed by the processor, cause the processor to perform a method comprising the steps of:
• receiving a first plurality of second differences of carrier phase measurements, wherein the first plurality of second differences of carrier phase measurements is based at least in part on GNSS signals received by a rover from a first plurality of GNSS satellites at a first measurement epoch and GNSS signals received by a base from the first plurality of GNSS satellites at the first measurement epoch;
• resolving a plurality of second differences of carrier phase ambiguities of the first plurality of second differences of carrier phase measurements;
• computing a first fixed position of the rover, wherein the first fixed position of the rover is based at least in part on the plurality of second differences of carrier phase ambiguities of the first plurality of second differences of carrier phase measurements;
• and
• computing a first plurality of sub-corrections, wherein the first plurality of sub-corrections is based at least in part on the first fixed position of the rover, a position of the base, a position of each specific GNSS satellite in the first plurality of GNSS satellites, and the first plurality of second differences of carrier phase measurements.

A computer readable medium storing computer program instructions for processing global navigation satellite system (GNSS) signals, wherein the computer program instructions, when executed by a processor, cause the processor to perform a method comprising the steps of:

• receiving a first plurality of second differences of carrier phase measurements, wherein the first plurality of second differences of carrier phase measurements is based at least in part on GNSS signals received by a rover from a first plurality of GNSS satellites at a first measurement epoch and GNSS signals received by a base from the first plurality of GNSS satellites at the first measurement epoch;
• resolving a plurality of second differences of carrier phase ambiguities of the first plurality of second differences of carrier phase measurements;
• computing a first fixed position of the rover, wherein the first fixed position of the rover is based at least in part on the plurality of second differences of carrier phase ambiguities of the first plurality of second differences of carrier phase measurements;
• and
• computing a first plurality of sub-corrections, wherein the first plurality of sub-corrections is based at least in part on the first fixed position of the rover, a position of the base, a position of each specific GNSS satellite in the first plurality of GNSS satellites, and the first plurality of second differences of carrier phase measurements.