A Mössbauer spectrometer was built and evaluated using an amplified piezoelectric actuator under feedback control for the Doppler velocity drive. The actuator was driven with a quadratic displacement
This manuscript explores the use of Global NavigationSatellite System – Reflectometry (GNSS-R) data collected by theSoil Moisture Active Passive (SMAP) mission to estimate antennaview angle offsets. A
