supported by the National Natural Science Foundation of China(61222108);the Research Fund for the Doctoral Program of Higher Education of China(20120203130001);the Fundamental Research Funds for the Central Universities(2015HGBZ0106;2015HGQC0005)
For spaceborne synthetic aperture radar (SAR) imaging,the dispersive ionosphere has significant effects on the propagationof the low frequency (especially P-band) radar signal. Theionospheric effects can be a sign...