P-Band interferometric SAR sensors recently have been experienced more attention due to their capability to penetrate vegetation coverage, thus offering the possibility to derive the ground topography of vegetated regions such as forests or agricultural areas. Aerosensing's AeS-1 airborne SAR system operates in its P-Band mode at 415 MHz with a bandwidth of 70 MHz, providing data with a ground resolution of approximately 3 m. Processing of these data needs particular operations in order to face several effects inherent in the airborne repeat-pass characteristic of the sensor. Subject of this paper is the end-to-end interferometric processing chain of AeS-1 data with respect to ground topography estimation. Examples of a flight campaign in Switzerland are given, where elevation measurements have been validated against a high-resolution digital surface model provided by the X-Band subsystem of AeS-1.
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