TY - JOUR A1 - Liu, L. A1 - Luan, X. A1 - Wan, W. A1 - Ning, B. A1 - Lei, J. T1 - A new approach to the derivation of dynamic information from ionosonde measurements JO - Ann. Geophys. J1 - ANGEO VL - 21 IS - 11 SP - 2185 EP - 2191 Y1 - 2003/11/30 PB - Copernicus Publications SN - 1432-0576 UR - https://angeo.copernicus.org/articles/21/2185/2003/ L1 - https://angeo.copernicus.org/articles/21/2185/2003/angeo-21-2185-2003.pdf DO - 10.5194/angeo-21-2185-2003 ER -