Artificial Satellites-Journal of Planetary Geodesy最新文献_第10页

Multi-gnss as a combination of gps, glonass and beidou measurements carried out in real time Multi-gnss是一种结合gps、glonass和北斗的实时测量系统

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-12-01 DOI: 10.1515/arsa-2015-0017

Z. Siejka

引用次数: 7

A Study on Along-Track and Cross-Track Noise of Altimetry Data by Maximum Likelihood: Mars Orbiter Laser Altimetry (Mola) Example 基于极大似然的测高数据沿轨和交叉轨噪声研究——以火星轨道器激光测高为例

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-12-01 DOI: 10.1515/arsa-2015-0012

W. Jarmołowski, Jacek Łukasiak

{"title":"A Study on Along-Track and Cross-Track Noise of Altimetry Data by Maximum Likelihood: Mars Orbiter Laser Altimetry (Mola) Example","authors":"W. Jarmołowski, Jacek Łukasiak","doi":"10.1515/arsa-2015-0012","DOIUrl":"https://doi.org/10.1515/arsa-2015-0012","url":null,"abstract":"Abstract The work investigates the spatial correlation of the data collected along orbital tracks of Mars Orbiter Laser Altimeter (MOLA) with a special focus on the noise variance problem in the covariance matrix. The problem of different correlation parameters in along-track and crosstrack directions of orbital or profile data is still under discussion in relation to Least Squares Collocation (LSC). Different spacing in along-track and transverse directions and anisotropy problem are frequently considered in the context of this kind of data. Therefore the problem is analyzed in this work, using MOLA data samples. The analysis in this paper is focused on a priori errors that correspond to the white noise present in the data and is performed by maximum likelihood (ML) estimation in two, perpendicular directions. Additionally, correlation lengths of assumed planar covariance model are determined by ML and by fitting it into the empirical covariance function (ECF). All estimates considered together confirm substantial influence of different data resolution in along-track and transverse directions on the covariance parameters.","PeriodicalId":43216,"journal":{"name":"Artificial Satellites-Journal of Planetary Geodesy","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67378616","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Routing Corners of Building Structures – by the Method of Vector Addition – Measured with RTN GNSS Surveying Technology 用RTN GNSS测量技术测量建筑构筑物的路径角——矢量加法法

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-12-01 DOI: 10.1515/arsa-2015-0015

Robert Krzyżek

引用次数: 5

Accuracy Assessment Study of UNB3m Neutral Atmosphere Model for Global Tropospheric Delay Mitigation 全球对流层延迟减缓UNB3m中性大气模式的精度评估研究

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-12-01 DOI: 10.1515/arsa-2015-0016

A. Farah

{"title":"Accuracy Assessment Study of UNB3m Neutral Atmosphere Model for Global Tropospheric Delay Mitigation","authors":"A. Farah","doi":"10.1515/arsa-2015-0016","DOIUrl":"https://doi.org/10.1515/arsa-2015-0016","url":null,"abstract":"Abstract Tropospheric delay is the second major source of error after the ionospheric delay for satellite navigation systems. The transmitted signal could face a delay caused by the troposphere of over 2m at zenith and 20m at lower satellite elevation angles of 10 degrees and below. Positioning errors of 10m or greater can result from the inaccurate mitigation of the tropospheric delay. Many techniques are available for tropospheric delay mitigation consisting of surface meteorological models and global empirical models. Surface meteorological models need surface meteorological data to give high accuracy mitigation while the global empirical models need not. Several hybrid neutral atmosphere delay models have been developed by (University of New Brunswick, Canada) UNB researchers over the past decade or so. The most widely applicable current version is UNB3m, which uses the Saastamoinen zenith delays, Niell mapping functions, and a look-up table with annual mean and amplitude for temperature, pressure, and water vapour pressure varying with respect to latitude and height. This paper presents an assessment study of the behaviour of the UNB3m model compared with highly accurate IGS-tropospheric estimation for three different (latitude/height) IGS stations. The study was performed over four nonconsecutive weeks on different seasons over one year (October 2014 to July 2015). It can be concluded that using UNB3m model gives tropospheric delay correction accuracy of 0.050m in average for low latitude regions in all seasons. The model's accuracy is about 0.075m for medium latitude regions, while its highest accuracy is about 0.014m for high latitude regions.","PeriodicalId":43216,"journal":{"name":"Artificial Satellites-Journal of Planetary Geodesy","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2015-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arsa-2015-0016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67378892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Algorithm For Modeling Coordinates Of Corners Of Buildings Determined With RTN GNSS Technology Using Vectors Translation Method RTN GNSS技术确定建筑物角点坐标的矢量平移建模算法

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-09-01 DOI: 10.1515/arsa-2015-0009

Robert Krzyżek

引用次数: 6

SLR Technique Used For Description Of The Earth Elasticity 用单反技术描述地球弹性

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-09-01 DOI: 10.1515/arsa-2015-0010

M. Rutkowska, M. Jagoda

{"title":"SLR Technique Used For Description Of The Earth Elasticity","authors":"M. Rutkowska, M. Jagoda","doi":"10.1515/arsa-2015-0010","DOIUrl":"https://doi.org/10.1515/arsa-2015-0010","url":null,"abstract":"Abstract We present estimated values for the global elastic parameters (h2, l2) derived from the analysis of Satellite Laser Ranging (SLR) data. We analyse SLR data for LAGEOS 1 and LAGEOS 2 and for two low satellites, STARLETTE and STELLA, collected over a period of 2.5 years, from January 1 2005 to July 1 2007, from 18 globally distributed ground stations. The adjusted final values (h2, l2) for all satellites are compared. A major discrepancy between the two solutions was only found for the Shida number l2. Computations were performed using GEODYN II NASA/GSFC software. The following analysis is the continuation of our research published in Jagoda and Rutkowska (2013); that analysis was conducted separately for the two low satellites, STELLA and STARLETTE (separately for STELLA and separately for STARLETTE) whereas in this study we present the results of determining h2 and l2 parameters obtained from the joint observation of the STELLA and STARLETTE satellites (STARLETTE + STELLA) and joint observation of high satellites: LAGEOS 1 and LAGEOS 2 (LAGEOS 1 + LAGEOS 2). The combination of the observation aims at an increased stability of the estimates and reduced errors of the means of the parameters being determined.","PeriodicalId":43216,"journal":{"name":"Artificial Satellites-Journal of Planetary Geodesy","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2015-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67378473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Calculation Of Position And Velocity Of GLONASS Satellite Based On Analytical Theory Of Motion 基于解析运动理论的GLONASS卫星位置和速度计算

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-09-01 DOI: 10.1515/arsa-2015-0008

W. Góral, B. Skorupa

引用次数: 3

Impact of Ocean Tides Loading on Precise Point Positioning Based on FES2004 Model 基于FES2004模型的海潮载荷对精确点定位的影响

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-06-01 DOI: 10.1515/arsa-2015-0006

J. Kalita, Z. Rzepecka

{"title":"Impact of Ocean Tides Loading on Precise Point Positioning Based on FES2004 Model","authors":"J. Kalita, Z. Rzepecka","doi":"10.1515/arsa-2015-0006","DOIUrl":"https://doi.org/10.1515/arsa-2015-0006","url":null,"abstract":"Abstract Precise Point Positioning (PPP) technique as an absolute positioning method requires modeling of effects that influence observations. One of the effects is a displacement of the measurement location due to ocean mass gravitational attraction - ocean tides loading (OTL). The model recommended by the International Earth Rotation and Reference Systems Service (IERS) is FES2004. The paper focuses on impact of applying the particular OTL model on PPP processing. The analysis is based on processing of observations from 24 globally distributed permanent stations and time span of 50 days. The analysis bases on processing intervals from 1 to 24 hours. In addition, the amplitudes of the loads in Poland are evaluated. The OTL model is location dependent, thus the importance of applying this model depends on the location environment. As the PPP is an absolute method, the loads cumulate and transfer nearly directly to the positioning solution. Consequently, for short observation intervals and small loads the application of the model does not play an important role. For the analysed station with high amplitudes of the loads the relative and absolute improvement, of the solution was the highest for height component. By applying the model, the solution improved by 19% or 7.3 mm (as for RMS and 8 hour interval). The distinct improvement for convergence exists for vertical component and threshold below 5 cm. For Poland the vertical component loads were about 5 times smaller and the highest improvement for the analysed station was 3.7% for 4 hour interval and vertical component.","PeriodicalId":43216,"journal":{"name":"Artificial Satellites-Journal of Planetary Geodesy","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arsa-2015-0006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67378521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Mesoscale Convective Systems Monitoring on the Basis of MSG Data – Case Studies 基于MSG数据的中尺度对流系统监测-个案研究

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-06-01 DOI: 10.1515/arsa-2015-0007

Karolina Szafranek, B. Jakubiak, Ryszard Lech, M. Tomczuk

{"title":"Mesoscale Convective Systems Monitoring on the Basis of MSG Data – Case Studies","authors":"Karolina Szafranek, B. Jakubiak, Ryszard Lech, M. Tomczuk","doi":"10.1515/arsa-2015-0007","DOIUrl":"https://doi.org/10.1515/arsa-2015-0007","url":null,"abstract":"Abstract Analysis described in the paper were made in the frame of the PROZA (Operational decisionmaking based on atmospheric conditions, http://projekt-proza.pl/) project co-financed by the European Union through the European Regional Development Fund. One of its tasks was to develop an operational forecast system, which is going to support different economies branches like forestry or fruit farming by reducing the risk of economic decisions with taking into consideration weather conditions. The main purpose of the paper is to describe the method of the MCSs (Mesoscale Convective Systems) tracking on the basis of the MSG (Meteosat Second Generation) data. Until now several tests were performed. The Meteosat satellite images in selected spectral channels collected for Central Europe Region for May 2010 were used to detect and track cloud systems recognized as MCSs in Poland. The ISIS tracking method was applied here. First the cloud objects are defined using the temperature threshold and next the selected cells are tracked using principle of overlapping position on consecutive images. The main benefit of using a temperature threshold to define cells is its efficiency. During the tracking process the algorithm links the cells of the image at time t to the one of the following image at time t+dt that correspond to the same cloud system. Selected cases present phenomena, which appeared at the territory of Poland. They were compared to the weather radar data and UKMO UM (United Kingdom MetOffice Unified Model) forecasts. The paper presents analysis of exemplary MCSs in the context of near realtime prediction system development and proves that developed tool can be helpful in MCSs monitoring.","PeriodicalId":43216,"journal":{"name":"Artificial Satellites-Journal of Planetary Geodesy","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67378254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GNSS-Warp Software for Real-Time Precise Point Positioning 实时精确点定位的GNSS-Warp软件

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Artificial Satellites-Journal of Planetary Geodesy Pub Date : 2015-06-01 DOI: 10.1515/arsa-2015-0005

Hadaś Tomasz

{"title":"GNSS-Warp Software for Real-Time Precise Point Positioning","authors":"Hadaś Tomasz","doi":"10.1515/arsa-2015-0005","DOIUrl":"https://doi.org/10.1515/arsa-2015-0005","url":null,"abstract":"Abstract On April 1, 2013 IGS launched the real-time service providing products for Precise Point Positioning (PPP). The availability of real-time makes PPP a very powerful technique to process GNSS signals in real-time and opens a new PPP applications opportunities. There are still, however, some limitations of PPP, especially in the kinematic mode. A significant change in satellite geometry is required to efficiently de-correlate troposphere delay, receiver clock offset, and receiver height. In order to challenge PPP limitations, the GNSS-WARP (Wroclaw Algorithms for Real-time Positioning) software has been developed from scratch at Wroclaw University of Environmental and Life Science in Poland. This paper presents the GNSS-WARP software itself and some results of GNSS data analysis using PPP and PPP-RTK (Real-Time Kinematic) technique. The results of static and kinematic processing in GPS only and GPS + GLONASS mode with final and real-time products are presented. Software performance validation in postprocessing mode confirmed that the software can be considered as a state-ofthe- art software and used for further studies on PPP algorithm development. The real-time positioning test made it possible to assess the quality of real-time coordinates, which is a few millimeters for North, East, Up in static mode, a below decimeter in kinematic mode. The accuracy and precision of height estimates in kinematic mode were improved by constraining the solution with an external, near real-time troposphere model. The software also allows estimation of real-time ZTD, however, the obtained precision of 11.2 mm means that further improvements in the software, real-time products or processing strategy are required.","PeriodicalId":43216,"journal":{"name":"Artificial Satellites-Journal of Planetary Geodesy","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arsa-2015-0005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67378383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 28