![]() The carrier phase measurements were processed using commercial post-processing software with reference to the closest base station observations located 4 km away. At the same time, a high-class geodetic receiver was used for L1 and L5 signal comparison purposes. For two sessions, the mobile phone was mounted vertically and for the third one-horizontally. ![]() We collected 3 h of raw static data in separate sessions at a known point location. Therefore, we decided to check the performance of carrier phase ambiguity fixing and positioning accuracy results of the latest Huawei P30 pro smartphone equipped with a dual-frequency GNSS receiver. Nowadays, GNSS chips, which are built in the latest smartphones, deliver code and primarily carrier phase observations available for detailed analysis in post-processing applications. Initially, researchers using signals gathered by mobile phones for high accuracy surveying were not successful in ambiguity fixing. No change necessary to meter setter or plumbing.Recent developments enable to access raw Global Navigation Satellite System (GNSS) measurements of mobile phones. ![]()
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