01540naa a2200241 a 450000100080000000500110000800800410001910000160006024500950007626000090017130000160018052008160019665000190101265000190103165000230105065000250107365000200109865300220111870000140114070000170115470000170117177301100118815645932002-04-02       1998    bl uuuu     u00u1 u    #d1 aSANO, E. E.  aThe use of SAR/TM synergy for estimating soil moisture content over a semi-arid rangeland.  c1998  ap. 175-183.  aThe C-band ERS-1 SAR data were combined with the Landsat TM data to improve the soil moisture estimates in a semiarid region. The SAR data were compared with the soil moisture measurements at three conditions: a) Without any correction for soil roughness and vegetation effects; b) corrected for soil roughnesseffects; and c) corrected for both soil roughness and vegetation effects. The soil roughness effects were taken into account by using a dry season SAR image. The vegetation influence was considered by using na empirical relationship between SAR and leaf area index data, the latter being derived from TM images. Results indicated that the contribution of soil roughness and vegetation in the radar backscatter were significant and they must be taken into account to accurate soil moisture estimations.  aremote sensing  asemiarid zones  asoil water content  aSensoriamento Remoto  aUmidade do Solo  aRegiao semi-arida1 aJIAGUO QI1 aHUETE, A. R.1 aMORAN, M. S.  tIn: LATINO-AMERICAN SEMINAR ON RADAR REMOTE SENSING, 2., 1998, Santos,SP. Proceedings. [S.l.: s.n], 1998.