Analysis of Total Electron Content (TEC) Derivation from Faraday Rotation

摘要

For low-frequency (UHF/VHF, P and L band) spaceborne SAR systems, the ionospheric effects are the most significantrnproblems. In this paper, the preliminary investigation of a technique aiming at using TEC information derived from PolSARrndata to reduce the ionospheric effects was implemented，and the TEC derivation was verified with six quad polarizedrnALOS/PALSAR data sets. In addition, the behaviour of Faraday rotation estimation from quad polarized ALOS/PALSAR datarnwas evaluated as the pre-requisite step of the above technique by comparing with the GPS based true TEC data sets overrndifferent areas. The experiment shows that the TEC information can be derived from the quad-pol data reasonably over midlatitudernarea.