GNSS MEASUREMENT PROCESSING WITH CARRIER PHASE RESIDUAL ERROR MODEL
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United States of America Patent
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Issued Date -
Jan 11, 2024
app pub date -
Jul 11, 2023
filing date -
Jul 11, 2022
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Abstract
A method and apparatus are provided for processing GNSS measurements to infer state information. An example method includes obtaining one or more residual error models for the plurality of GNSS measurements. The one or more residual error models describe a probability distribution of errors in each of the GNSS measurements. The method further includes inferring the state information based on the one or more residual error models. The GNSS measurements include at least one carrier phase measurement. The residual error model for the at least one carrier phase measurement is cyclic, such that errors in carrier phase that are separated by an integer number of cycles are regarded as equivalent. The probability distribution for the at least one carrier phase measurement comprises a function having a continuous first derivative, for example, a continuous first derivative at a phase boundary between successive cycles.
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