Anton Thomsen

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In the context of the investigation of the sedimentary and structural evolution of the Cenozoic Lower Rhine Basin, the construction of a volume-balanced kinematic model of a small faulted domain with detailed spatial information on strata and fault geometry from a set of parallel geological sections is under development. A 3D geometry model is built that(More)
The development of site-specific crop management is constrained by the availability of sensors for monitoring important soil and crop related conditions. A mobile time-domain reflectometry (TDR) unit for geo-referenced soil measurements has been developed and used for detailed mapping of soil water content and electrical conductivity within two research(More)
Several methods were developed for the redistribution of nitrogen (N) fertilizer within fields with winter wheat (Triticum aestivum L.) based on plant and soil sensors, and topographical information. The methods were based on data from nine field experiments in nine different fields for a 3-year period. Each field was divided into 80 or more subplots(More)
The SVAT model DAISY is modified to be able to utilize remote sensing (RS) data in order to improve prediction of evapotranspiration and photosynthesis at plot scale. The link between RS data and the DAISY model is the development of the minimum, unstressed, canopy resistance rmin c during the growing season. Energy balance processes are simulated by(More)
Danish polarimetric SAR data have been applied t o estimate soil moisture (SM). The preliminary results evaluated with the Land C-band SAR dat,a acquired at the Danish test site Foulum during a number of missions in 1994 and 1995 are presented. In situ data have been collected during the SAR missions and the variations of SM at field scale are discussed.(More)
Danish polarimetric SAR data have been applied t o estimate soil moisture (SM). The preliminary results evaluated with the Land C-band SAR dat,a acquired at the Danish test site Foulum during a number of missions in 1994 and 1995 are presented. In situ data have been collected during the SAR missions and the variations of SM at field scale are discussed.(More)
289 MODELLING CROP GROWTH AND QUALITY IN THE AGROECOSYSTEM Research Centre Foulum 23-24 June 1998 NJF SEMINAR NR. 289 The description and modelling of crop growth and quality has received increasing attention over the past decades. There are widely different aims and scales in the use crop modelling. Some models are thus used to increase knowledge on the(More)
Organic soils represent a substantial pool of carbon in Denmark. The need for carbon stock assessment calls for more rapid and effective mapping methods to be developed. The aim of this study was to compare traditional soil mapping with maps produced by a mobile VIS/NIR system and evaluate the ability to estimate TOC and map the area of organic soils. The(More)
The dependence of different polarimetric parameters on the incidence angles in the range of 30" to 60" is investigated for a number of different crops using airbome S A R data. The purpose of the investigation is to determine the effect of the variation of incidence angle within a S A R image when using different polarimetric parameters for crop(More)