يعرض 1 - 10 نتائج من 40 نتيجة بحث عن '"insar measurements"', وقت الاستعلام: 1.64s تنقيح النتائج
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    دورية أكاديمية

    المؤلفون: Peng, W., Wang, Q., Zhan, F.B., Cao, Y.

    المصدر: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of. 13:3772-3779 2020

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    دورية أكاديمية
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    دورية أكاديمية

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    المصدر: Remote Sensing of Environment. 204:596-616

    مصطلحات موضوعية: water content (VWC) and canopy structure are related to these parameters and provide a first assessment of the potential of estimating such characteristics using Pol-InSAR time series in L, Canopy, the NVP for maize in L- and C-Bands appears to decrease with increasing biomass due to the increasingly important double bounce ground-stalk scattering contribution as plants become taller and thicker. Overall, 010504 meteorology & atmospheric sciences, the estimated normalized volume backscattering power NVP (a measure of the relative scattering contribution from the canopy compared to the underlying soil) is associated with wet biomass. However, amongst others, 0211 other engineering and technologies, Soil Science, 02 engineering and technology, the Pol-InSAR attenuation loss and NVP may complement the information of the estimated crop height, 01 natural sciences, Vertical orientation, on crop type and radar frequency. When choosing an appropriate baseline/frequency configuration, this sensitivity is however dependent, Computers in Earth Sciences, Water content, structural changes occurring within the plant growth cycle appear to have an appreciable polarization-dependent effect on the observed attenuation changes. In addition, 021101 geological & geomatics engineering, 0105 earth and related environmental sciences, Remote sensing, Moisture, Scattering, Attenuation, these results indicate the sensitivity of the Pol-InSAR parameters to canopy structure and biomass, food and beverages, Geology, Inversion (meteorology), especially if the latter shows very little variation over the plant growth cycle (e.g. as for wheat), positive for wheat in C- and X-Bands) indicates again the role of crop structural properties in the Pol-InSAR measurements. For instance, the contrasting sign of this relation (negative for maize in L- and C-Bands, Interferometry, we investigate how vegetation characteristics including biomass, larger attenuation in VV than HH points toward the existence of anisotropic propagation effects due to vertical orientation of the stalks. Conversely, Environmental science, Polarimetric SAR Interferometry (Pol-InSAR) has shown great promise for estimating the height of agricultural crops through the inversion of a scattering model of the plant canopy and the soil. The inversion also provides estimates of model parameters describing the microwave attenuation within the canopy and the relative scattering contributions from canopy and soil surface. Here, for wheat in C- and X-Bands there is no consistent relation between attenuation loss and VWC. Rather, C- and X-Bands. The overall attenuation for maize is positively related to total VWC in L- and C-Bands. Furthermore