Toša Ninkov

Estimate of the ASTER GDEM regional systematic errors and their removal

The aim of this article is to analyse and estimate the systematic errors of the Advanced Spaceborne Thermal Emission and Reflection Radiometer Global Digital Elevation Model (ASTER GDEM), assuming the existence of systematic influences due to the erroneously determined altitude datum. The assumption is based on the identical sign for the majority of differences between the control point elevations and the elevations derived from GDEM. The question is how to model a systematic influence and whether such a model can improve the global GDEM accuracy. The error analysis comprises two unbiased test areas (flat and hilly areas), where one uses the elevations of the control points as conditionally correct values. Three methods of estimating and eliminating the systematic errors are presented: a constant-systematic-error model, a variable-systematic-error model by first-order polynomial and a variable-systematic error model by second-order polynomial. The accuracy analysis concerning the original and calibrated GDEMs indicates a significant accuracy improvement in the case of the calibrated methods for both test areas, especially for the flat area.

The efficiency of different outlier detection approaches in geodetic networks: case study for Pobednik statue

outlier, outlier analysis, geodetic observations, geodetic network, conventional tests, robust methods grobi pogrešek, analiza grobih pogreškov, geodetska opazovanja, geodetska mreža, klasične analize, robustne metode UDK: 528.1:528.41(497.11Beograd) Klasifikacija prispevka po COBISS.SI: 1.01 Prispelo: 12. 12. 2017 Sprejeto: 25. 5. 2018 DOI: 10.15292/geodetski-vestnik.2018.02.293-305 SCIENTIFIC ARTICLE Received: 12. 12. 2017 Accepted: 25. 5. 2018 Mehmed Batilović, Zoran Sušić, Marko Z. Marković, Marijana Vujinović, Gojko Nikolić,Toša Ninkov UČINKOVITOST RAZLIČNIH NAČINOV ODKRIVANJA GROBIH POGREŠKOV V GEODETSKIH MREžAH: PRIMER SPOMENIKA POBEDNIK THE EffICIENCY Of DIffERENT OUTLIER DETECTION APPROACHES IN GEODETIC NETWORKS: CASE STUDY fOR POBEDNIK STATUE

Present-day Horizontal Mobility in the Serbian Part of the Pannonian Basin; Inferences from the Geometric Analysis of Deformations

In tectonically complex environments, such as the Pannonian Basin surrounded by the Alps–Dinarides and Carpathians orogens, monitoring of recent deformations represents very challenging matter. Efficient quantification of active continental deformations demands the use of a multidisciplinary approach, including neotectonic, seismotectonic and geodetic methods. The present-day tectonic mobility in the Pannonian Basin is predominantly controlled by the northward movement of the Adria micro-plate, which has produced compressional stresses that were party accommodated by the Alps-Dinarides thrust belt and partly transferred towards its hinterland. Influence of thus induced stresses on the recent strain field, deformations and tectonic mobility in the southern segment of the Pannonian Basin has been investigated using GPS measurements of the horizontal mobility in the Vojvodina area (northern Serbia).