Correction to: GPS Solutions (2021) 25:19 https://doi.org/10.1007/s10291-020-01055-1

In the original article published, the references Wang et al. 2016a and Wang et al. 2016b are incorrect. The correct references are:

Wang et al. 2016a—Wang Y, Yao H, Zhao S (2016b) Auto-encoder based dimensionality reduction. Neurocomputing 184:232–242. https://doi.org/10.1016/j.neucom.2015.08.104

Wang et al. 2016b—Wang N, Yuan Y, Li Z, Huo X (2016a) Improvement of Klobuchar model for GNSS single-frequency ionospheric delay corrections. Adv Space Res 57(7):1555–1569. https://doi.org/10.1016/j.asr.2016.01.010

The original article has been corrected.