Title :
Sensitivity of TerraSAR-X-band data to surface parameters in bare agricultural areas
Author :
Panciera, Rocco ; MacGill, Fiona ; Tanase, M. ; Lowell, Kim ; Walker, Julian
Author_Institution :
Cooperative Res. Centre for Spatial Inf., Univ. of Melbourne, Melbourne, VIC, Australia
Abstract :
The relationship between X-band Synthetic Aperture Radar (SAR) observations and soil moisture (SM) and surface roughness (SR) is investigated over well-monitored bare agricultural fields, using TerraSAR-X observations at 37.8° (VV and HH polarization) and 42.3° (VV and VH). TerraSAR backscatter increased with increasing SM but exhibited limited sensitivity, the highest (0.14 dB/m3/m3) being in the 0 - 0.03 m3/m3 SM range and for smooth conditions (SR <; 1.5cm) and 37.8°. In such conditions HH- and VV-pol exhibited very similar sensitivity to SM. The impact of SR on the X-band signal was significant in the 0.5 - 1.5 cm range with a positive correlation for all polarizations and angles analysed, with observations at wider angles 42.3° being the most sensitive to SR.
Keywords :
moisture; radar polarimetry; soil; surface roughness; synthetic aperture radar; terrain mapping; HH polarization; TerraSAR X-band data; TerraSAR backscatter; TerraSAR-X observations; VV polarization; X-band signal; X-band synthetic aperture radar observations; bare agricultural fields; smooth conditions; soil moisture; surface parameters; surface roughness; Backscatter; Correlation; Rough surfaces; Sensitivity; Soil moisture; Surface roughness; Remote Sensing; SAR; Soil Moisture; TerraSAR;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2013 IEEE International
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4799-1114-1
DOI :
10.1109/IGARSS.2013.6721266
