TY - JOUR A1 - Wang, K.-N. A1 - de la Torre Juárez, M. A1 - Ao, C. O. A1 - Xie, F. T1 - Correcting negatively biased refractivity below ducts in GNSS radio occultation: an optimal estimation approach towards improving planetary boundary layer (PBL) characterization JO - Atmos. Meas. Tech. J1 - AMT VL - 10 IS - 12 SP - 4761 EP - 4776 Y1 - 2017/12/08 PB - Copernicus Publications SN - 1867-8548 UR - https://amt.copernicus.org/articles/10/4761/2017/ L1 - https://amt.copernicus.org/articles/10/4761/2017/amt-10-4761-2017.pdf DO - 10.5194/amt-10-4761-2017 ER -