US 12,468,048 B2
Post-processing of global navigation satellite system (GNSS) data
Yanling Min, Shanghai (CN); Xiao Cao, Shanghai (CN); and Brian Schipper, Maple Grove, MN (US)
Assigned to Honeywell International Inc., Charlotte, NC (US)
Filed by Honeywell International Inc., Charlotte, NC (US)
Filed on Jan. 30, 2023, as Appl. No. 18/161,615.
Claims priority of provisional application 63/379,105, filed on Oct. 11, 2022.
Prior Publication US 2024/0118435 A1, Apr. 11, 2024
Int. Cl. G01S 19/44 (2010.01); G01S 19/37 (2010.01)
CPC G01S 19/44 (2013.01) [G01S 19/37 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving GNSS data corresponding to a vehicle, the GNSS data including, for each of a plurality of epochs, pseudorange measurements, carrier phase measurements, and satellite positions for a plurality of satellites;
generating a forward position solution and a backward position solution from the GNSS data, wherein the forward position solution and the backward position solution are generated based on, for each of the plurality of epochs, a combination of the following types of processing: (1) single point positioning (SPP) processing, (2) carrier smoothed code differential (CSCD) processing, (3) wide lane (WL) fixed ambiguity positioning processing, and (4) L1 fixed ambiguity positioning processing;
generating, for each epoch pair including the forward position (FP) solution and the corresponding backward position (BP) solution, a combined position solution based on a comparison of: (i) integer ambiguity values of a respective position generated for both epochs of the corresponding epoch pair, and (ii) the type of processing used to generate the respective position generated for both epochs of the corresponding epoch pair; and
generating a post-processed GNSS solution including the combined position solution generated for each corresponding epoch pair.