TY - JOUR A1 - Lin, C. Y. A1 - Matsuo, T. A1 - Liu, J. Y. A1 - Lin, C. H. A1 - Tsai, H. F. A1 - Araujo-Pradere, E. A. T1 - Ionospheric assimilation of radio occultation and ground-based GPS data using non-stationary background model error covariance JO - Atmos. Meas. Tech. J1 - AMT VL - 8 IS - 1 SP - 171 EP - 182 Y1 - 2015/01/12 PB - Copernicus Publications SN - 1867-8548 UR - https://amt.copernicus.org/articles/8/171/2015/ L1 - https://amt.copernicus.org/articles/8/171/2015/amt-8-171-2015.pdf DO - 10.5194/amt-8-171-2015 ER -