Wilson, W.J., S.H. Yueh, S.J. Dinardo, S.L. Chazanoff, A. Kitiyakara, F.K. Li, and Y. Rahmat-Samii (2001), Passive Active L- and S-Band (PALS) Microwave Sensor for Ocean Salinity and Soil Moisture Measurements, IEEE Trans. Geosci. Remote Sens., 39.