Remote sensing of rough surface spectra with multi-frequency microwave radiometry. - Yonghun Cheon; Joel T. Johnson; David R. Wiggins (IGARSS, 2002)

Sub-surface object sensing with multi-frequency microwave radiometry. - David R. Wiggins; Hyunjun Kim; Yonghun Cheon; Joel T. Johnson (IGARSS, 2002)

Subsurface object sensing with a multifrequency microwave radiometer. - Joel T. Johnson; Hyunjun Kim; David R. Wiggins; Yonghun Cheon (IEEE Trans. Geosci. Remote. Sens., 2002)