First Experiment With an Altimeter With Knife-Like Beam: Comparison With a Model of the Waveform of a Reflected Impulse. - Vladimir Yu. Karaev; Yuriy A. Titchenko; Kirill Ponur; Eugeny Meshkov; Andrey Krylov; Egor Khakhin; Sonia Ponce de León; Maria Panfilova; Igor Lebedev; Maria Ryabkova (IEEE Trans. Geosci. Remote. Sens., 2025)