Application of Integrated GNSS/Hydroacoustic Measurements and GIS Geodatabase Models for Bottom Analysis of Lake Hancza: the Deepest Inland Reservoir in Poland

Świtalski

Polish Maritime Research

2017

Section: Bathymetric Measurement Of the Retention Reservoir And Measumentioning

confidence: 99%

Application of an Autonomous/Unmanned Survey Vessel (ASV/USV) in Bathymetric Measurements

Świtalski

Polish Maritime Research

2017

“…Subsequent detailed cartometric measurements, conducted after the completion of fieldwork, showed that this lake is larger (1.24 hm 2 ). Additionally, Lake Hańcza, the largest lake in the SLP, was excluded from the initial list as bathymetric research had been conducted as recently as 2010-2011 (Popielarczyk and Templin 2014;Popielarczyk et al 2015). Thus, the final field measurements included 21 lakes.…”

Section: Research Areamentioning

confidence: 99%

A new bathymetric survey of the Suwałki Landscape Park lakes

Borowiak

Nowiński

Grabowska

2016

Limnological Review

Abstract:The results of the latest bathymetric survey of 21 lakes in the Suwałki Landscape Park (SLP) are presented here. Measurements of the underwater lake topography were carried out in the years 2012-2013 using the hydroacoustic method (sonar Lawrence 480M). In the case of four lakes (Błędne, Pogorzałek, Purwin, Wodziłki) this was the first time a bathymetric survey had been performed. Field material was used to prepare bathymetric maps, which were then used for calculating the basic size and shape parameters of the lake basins. The results of the studies are shown against the nearly 90 year history of bathymetric surveying of the SLP lakes. In the light of the current measurements, the total area of the SLP lakes is over 634 hm 2 and its limnic ratio is 10%. Lake water resources in the park were estimated at 143 037.1 dam 3 . This value corresponds to a retention index of 2257 mm. In addition, studies have shown that the previous morphometric data are not very accurate. The relative differences in the lake surface areas ranged from -14.1 to 9.1%, and in the case of volume -from -32.2 to 35.3%. The greatest differences in the volume, expressed in absolute values, were found in the largest SLP lakes: Hańcza

“…The global navigation satellite system (GNSS) positioning is currently one of the fastest developing measurement techniques, having applications in daily life and scientific research, including wide usage in navigation and surveying (Teunissen et al 2011;Popielarczyk and Templin 2014). In most cases, which involve both real-time and post-processing applications, positions can be determined with subcentimeter accuracy in relative mode.…”

Section: Introductionmentioning

confidence: 99%

Study on reliable GNSS positioning with intense TEC fluctuations at high latitudes

Sieradzki

Paziewski

2015

GPS Solut

The study presents the influence of strong total electron content (TEC) fluctuations occurring at high latitudes on rapid static positioning. The authors propose an algorithm mitigating the impact of dynamic temporal changes in electron content using the rate of TEC corrections. It consists of modifying the observations using the measured rate of TEC variations and hence allows reducing the number of parameters to one ionospheric delay of a reference epoch per satellite and per session. An analysis was carried out for a typical quiet day in solar minimum on September 6, 2009 and a disturbed day during high solar activity on March 17, 2013. For a standard geometry-based relative model with weighted ionosphere and troposphere, the results confirmed the dramatic drop of ambiguity resolution efficiency during a violent space weather event. The results obtained for the new algorithm, however, demonstrate its wide applicability and a 10-fold improvement in ambiguity success rate during the disturbed day.