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Airborne passive-microwave signatures collected in Northern Finland during EMAC-95 are analyzed with the emphasis on forested areas and dry snow conditions. The microwave signatures cover the 6.8–18.7-GHz frequency range and were acquired at both vertical and horizontal polarizations. The analysis is carried out with respect to the forest-stem volume data(More)
Scattering phase center (SPC) location in boreal forests was studied in order to assist forest inventory with singleand quad-pol synthetic aperture radar (SAR) interferometry. Airborne Xand L-band interferometric SAR data collected by the DLR E-SAR instrument in southern Finland during the FINSAR campaign was used in the study. A simple Random Volume over(More)
In this letter we present results from the FinSAR project, where the E-SAR and HUTSCAT instruments were operated together in order to validate tree height retrieval algorithms for boreal forest. The campaign was carried out in Finland in fall 2003. The main instruments of the campaign were the E-SAR airborne radar (operating at Land X-band) and the HUTSCAT(More)
This paper discusses the possibility to use spaceborne X-band radar interferometry for forest height mapping. In our previous works was shown that airborne X-band SAR interferometry combined with accurate ground elevation model can provide good estimates of boreal forest height. In order to apply this technique to spaceborne SAR images, temporal variability(More)
This work investigates applicability of spaceborne repeat-pass interferometric SAR images for detecting mowing events on agricultural fields. Four pairs of one-day repeat-pass COSMO-SkyMed acquisitions were analysed and compared to in situ measurements of 11 agricultural grasslands to study the potential of X-band temporal interferometric coherence for(More)
The objective of this study was to investigate dairy cows' time spent in the possibly stressful waiting area (WA) of the milking parlor (MP) and their behavioral patterns while there and thereby investigate comparative effects on their welfare. The experiments were carried out in 3 loose-housing cowsheds. The study consisted of a total of 3,522 observations(More)
The purpose of this paper is to discuss two polarimetric parameters which are widely used in synthetic aperture radar (SAR) polarimetry, namely, target entropy and alpha angle. We propose alternative parameters based on our analysis on how they are connected to covariance matrix similarity invariants and how they can be physically interpreted in optical(More)
This paper evaluates performance of fully polarimetric SAR (PolSAR) data in several land cover mapping studies in the boreal forest environment, taking advantage of the high canopy penetration capability at L-band. The studies included multiclass land cover mapping, forest–nonforest delineation, and classification of soil type under vegetation. PolSAR data(More)