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AssigneeTrimble Navigation Limited
InventorsUlrich Vollath, Kenneth Donald Doucet
Estimating the term…
Three new methods are presented to improve floating solutions and ambiguity resolution for multiple global satellite navigation systems (GNSS), one of which may be an FDMA-based GNSS such as GLONASS: (1) modeling of the hardware-related differential clock error between two (or more) different GNSS, (2) modeling the frequency-dependent biases present in frequency-division multiple access (FDMA) GNSS, and (3) an ambiguity resolution method called Scoreboard Partial Fixing (SPF). The methods presented are independent of the number of carrier frequencies tracked for each satellite navigation system. Their application results in quicker and more reliable ambiguity resolution. The benefits of combining observations of multiple GNSS are exploited in a very efficient way, in contrast to known algorithms which often result in degraded performance with multiple GNSS. The frequency-dependent bias method has been found effective with GNSS observations from a combination of substantially dissimilar hardware, e.g., for processing signals from GNSS receivers of different manufacturers.
1-41. (canceled)
A method of processing signal data derived from signals received at multiple stations from satellites of two or more GNSS, at least one GNSS comprising a FDMA GNSS, comprising:
Apparatus for processing signal data derived from signals received at multiple stations from satellites of two or more GNSS, at least one GNSS comprising a FDMA GNSS, comprising a processor with instructions for:
Dependencies are inferred from the claim text.