Abstract To reduce hardware costs, mixed single and dual frequency GNSS mode is used in deformation monitoring. The key technological challenge of this mode concerns how to use the data of dual frequency points to build a precise regional ionosphere error correction model for the single frequency point, so that the accuracy of single frequency points can meet the demand. To meet this challenge, the data of land subsidence monitoring network in Nansha, Guangzhou is used to analyze 4 different ionosphere correction models (LCM, DIM, LIM and LSM) and processing strategies. The result shows that all of the 4 models can improve the monitoring precision of single frequency point, and that LCM and LIM perform better than DIM and LSM. It also indicates the strategy using three dual frequency points nearest to the single frequency point is best for constructing the ionosphere correction model.
ZHANG Chao,DAI Wujiao,SHI Qiang et al. Ionosphere Delay Correction for Single Frequency Points in a GNSS Deformation Monitoring System with Mixed Single and Dual Frequency Mode[J]. jgg, 2016, 36(5): 425-.
ZHANG Chao,DAI Wujiao,SHI Qiang et al. Ionosphere Delay Correction for Single Frequency Points in a GNSS Deformation Monitoring System with Mixed Single and Dual Frequency Mode[J]. jgg, 2016, 36(5): 425-.
