Abstract:This paper analyzes the observation quality of the low-cost single-frequency u-blox receiver and evaluates its attitude determination precision by experimental comparison. The results, based on real data, show that the SNR of GPS, BDS observations collected by u-blox is slightly lower than a surveying receiver; pseudorange accuracies of GPS, BDS observations are 0.91 m, 0.56 m, phase accuracies are 1.13 cm, 1.20 cm, respectively. The orientation precision of the u-blox receiver can reach 0.2°/m and 0.4°/m of heading and pitch in a static environment, while in a dynamic environment it can reach 0.3°/m and 0.6°/m, which is slightly worse than that of the single-frequency resolution of high-cost surveying receiver.