Characterizing Olive Grove Canopies by Means of Ground-Based Hemispherical Photography and Spaceborne RADAR Data
نویسندگان
چکیده
منابع مشابه
Characterizing Olive Grove Canopies by Means of Ground-Based Hemispherical Photography and Spaceborne RADAR Data
One of the main strengths of active microwave remote sensing, in relation to frequency, is its capacity to penetrate vegetation canopies and reach the ground surface, so that information can be drawn about the vegetation and hydrological properties of the soil surface. All this information is gathered in the so called backscattering coefficient (σ(0)). The subject of this research have been oli...
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Direct intercomparisons between spaceand ground-based radar measurements can be a challenging task. Differences in viewing aspects between space and earth observations, propagation paths, frequencies, resolution volume size, and time synchronization mismatch between spaceand ground-based observations can contribute to direct point-by-point intercomparison errors. This problem is further complic...
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We developed and tested a methodology to estimate olive (Olea europaea L.) gross primary production (GPP) combining ground and multi-sensor satellite data. An eddy-covariance station placed in an olive grove in central Italy provided carbon and water fluxes over two years (2010–2011), which were used as reference to evaluate the performance of a GPP estimation methodology based on a Monteith ty...
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\Vith the availability of active \veather radar observations from space from the Precipitation Radar CPR) on board the Tropical Rainfall Measuring Mission (T~\if~/l) satellite, numerous studies have been performed comparing PR retlectivity and derived rain rates to similar observations from ground-based weather radars (GR). These studies ha\e used a variety of algorithms to compute matching PR ...
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We present the formulation, calibration and validation of a model to estimate photosynthetically active radiation (PAR) intercepted by olive (Olea europaea L.) canopies. The model calculates the PAR transmittance at any point located within the four central trees of the orchard. The spatial and time integration of this process allows calculation of PAR transmitted to the ground and, thus, the P...
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ژورنال
عنوان ژورنال: Sensors
سال: 2011
ISSN: 1424-8220
DOI: 10.3390/s110807476