Московский государственный университет геодезии и картографии (МИИГАиК), г. Москва, 2 Государственный исторический музей (ГИМ), г. Москва 3 Евразийский отдел Германского археологического Института, г.Берлин 4 Государственный научно исследовательский институт авиационных систем (ГосНИИАС), г. Москва 5 Институт древнейшей истории университета Фридрих-Александра, г. Ерланген-Нюрнберг
A simple and effective calibration technique for the new optoelectronic dual channel precipitation gauge (ODPG) is developed. The main result of the calibration procedure is minimization of the particle size measurement errors that depend on the optical system aberrations. Laboratory tests are carried out for generation of the calibration parameters, and for confirmation of the first theoretical evaluations performed for the device technical characteristics. The ODPG field tests (measurement of the rain parameters) demonstrate high degree of reliability of the developed design -steady operation of optical and electronic systems after transportation, efficiency of algorithms used for acquisition and processing of measurement data and calculation of the precipitation parameters.
Abstract. It is well-known that in order to obtain up-to-date spatial information of rapidly developing cities, aerial photography is carried out almost annually. This work is devoted to the joint aerial triangulation of aerial urban area photographs obtained at different times. The main problem of the joint aerial triangulation of different-time images is the process of tie points detection. In this paper it is proposed to search for tie points exclusively on the roofs of building since they are least susceptible to change over time. In order to do this, the roofs of buildings are highlighted on the original aerial photographs via the Unet neural network and then tie points are detected within these areas. The technology made it possible to improve the quality of aerial triangulation: remove photogrammetric gaps in the given block, increase the number of tie points, reduce the processing time by 25% without increasing computing requirements. This approach to the search for tie points made it possible to increase the efficiency of aerial triangulation not only when processing archival and current images together, but also when processing only the results of actual aerial photography.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.