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Wyświetlanie 1-15 z 21
Tytuł:
Przeliczanie i transformacja współrzędnych pomiędzy układami odniesienia
On version and transformation of coordinates between reference systems
Autorzy:
Mendel, M.
Powiązania:
https://bibliotekanauki.pl/articles/235845.pdf
Data publikacji:
2011
Wydawca:
Wojskowy Instytut Techniczny Uzbrojenia
Tematy:
geoida
GPS
układy współrzędnych
Global Positioning System
coordinate systems
Opis:
W artykule przedstawiono zagadnienia związane przeliczaniem i transformacją współ- rzędnych w odwzorowaniach kartograficznych. Zamieszczono gotowe wzory i algorytmy służące do realizacji zadań związanych z przeliczaniem i transformacją współrzędnych. Objaśniono również podstawowe pojęcia używane w geodezji i kartografii.
In the paper the issues concerning conversion and transformation of coordinates in map projections were presented. The formulae and the algorithms for carrying out the tasks connected with the conversion and the transformation of coordinates were quoted. The basic terms used in geodesy and cartography were also explained.
Źródło:
Problemy Techniki Uzbrojenia; 2011, R. 40, z. 119; 7-19
1230-3801
Pojawia się w:
Problemy Techniki Uzbrojenia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Differences in mathematical models of GPS and pseudolite observation equations
Autorzy:
Rzepecka, Z.
Wasilewski, A.
Cellmer, Sł.
Rapiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/225048.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GPS
satelita GPS
pseudosatelita
system pozycjonowania obiektów
pomiary geodezyjne
GPS satellite
pseudo-satellite
Global Positioning System
engineering surveying
Opis:
Some error sources in GPS surveys, such as linearization error and orbital bias, are well known and do not require further investigation. The impact of these errors in GPS + pseudolite observations can be different and must be considered separately. This paper presents influence of orbital bias and linearization error on single differenced pseudolite observations.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 295-301
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
ASI activities in CEGROP II framework: Discussion of the results
Autorzy:
Vespe, F.
Garramone, L.
Marzo, C.
Rutigliano, P.
Pacione, R.
Powiązania:
https://bibliotekanauki.pl/articles/224452.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
osuwiska
GPS
system pozycjonowania obiektów
CERGOP
landslides
Global Positioning System
Opis:
ASI/CGS contribution to CERGOP II project covered the following topics: landslide monitoring, production and quality check of zenith total delays estimated for a global as well as regional GPS networks devoted to meteorology applications, RTK and navigation tests, critical analysis of GPS long time series helpful for geodynamic as well atmospheric investigations. For what concern the landslides monitoring the two sites under investigation: Aliano and Avigliano are located in Basilicata region, (South of Italy). These sites are affected by a dramatic creep of the ground which in the past was the cause of severe damages to the buildings and roads in the areas. We will show the state of art of the activities comparing GPS with Perrnanent Scatter IN-SAR technique For what concern the routine production of ZTD we will show a critical comparisons of our solutions with radio balloon observations and a discussion about the assessment of their reliability. Finally the results of a navigation experiment by using differential correction provided by EUREF-NTRIP service will be shown.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 201-215
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental studies on the relationship between HDOP and position error in the GPS system
Autorzy:
Specht, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/2052120.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Global Positioning System
GPS
Horizontal Dilution of Precision
HDOP
position error
Opis:
2D position error in the Global Positioning System GPS depends on the horizontal dilution of precision (HDOP) and User Equivalent Range Error UERE. The non-dimensional HDOP coeffcient, determining the influence of satellite distribution on the positioning accuracy, can be calculated exactly for a given moment in time. However, the UERE value is a magnitude variable in time, especially due to errors in radio propagation (ionosphere and troposphere effects) and it cannot be precisely predicted. The variability of the UERE causes the actual measurements (despite an exact theoretical mathematical correlation between the HDOP value and the position error) to indicate that position errors differ for the same HDOP value. The aim of this article is to determine the relation between the GPS position error and the HDOP value. It is possible only statistically, based on an analysis of an exceptionally large measurement sample. To this end, measurement results of a 10-day GPS measurement campaign (900,000 fixes) have been used. For HDOP values (in the range of 0.6-1.8), position errors were recorded and analysed to determine the statistical distribution of GPS position errors corresponding to various HDOP values. The experimental study and statistical analyses showed that the most common HDOP values in the GPS system are magnitudes of: 0.7 ( = 0.353) and 0.8 ( = 0.432). Only 2.77% of fixes indicated an HDOP value larger than 1. Moreover, 95% of measurements featured a geometric coeffcient of 0.973 - this is why it can be assumed that in optimal conditions (without local terrain obstacles), the GPS system is capable of providing values of HDOP ≤ 1, with a probability greater than 95% (2). Obtaining a low HDOP value, which results in a low GPS position error value, calls for providing a high mean number of satellites (12 or more) and low variability in their numer.
Źródło:
Metrology and Measurement Systems; 2022, 29, 1; 17-36
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The determination of inland vessel’s maneuvering area using GPS
Wyznaczanie obszaru manewrowego jednostki śródlądowej za pomocą GPS
Autorzy:
Sobkowicz, P.
Powiązania:
https://bibliotekanauki.pl/articles/250600.pdf
Data publikacji:
2016
Wydawca:
Instytut Naukowo-Wydawniczy TTS
Tematy:
maneuvering area
GPS
inland waterway
Global Positioning System
GPS RTK
obszar manewrowy
statek śródlądowy
Globalny System Pozycjonowania
Opis:
The article discusses issues relating to the determination of a maneuvering area of an inland vessel. The author presents the methodology for defining the vessel's swept path width through simulation and field studies. The Global Positioning System has been characterized in view of possible use of GPS RTK to determine a safe maneuvering area of a ship sailing on inland waterway. The author also explains the procedure of measurements using GPS RTK and discusses problems that may be encountered during tests.
W artykule omówiona została problematyka określania obszaru manewrowego statku śródlądowego. Przedstawiono metodologię określania szerokości pasa ruchu jednostki za pomocą badań symulacyjnych oraz rzeczywistych. Scharakteryzowano Globalny System Pozycjonowania i zaprezentowano możliwość wykorzystania GPS RTK do określania bezpiecznego obszaru manewrowego statku w żegludze śródlądowej. Omó-wiono procedurę wykonywania pomiarów za pomocą GPS RTK oraz problemy jakie można napotkać podczas przeprowadzania badań.
Źródło:
TTS Technika Transportu Szynowego; 2016, 12; 200-204
1232-3829
2543-5728
Pojawia się w:
TTS Technika Transportu Szynowego
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elaboration of geodetic control network at construction of bridge over Vistula River in Pulawy
Autorzy:
Rzepecka, Z.
Wasilewski, A.
Cellmer, Sł.
Rapiński, J.
Powiązania:
https://bibliotekanauki.pl/articles/225050.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GPS
satelita GPS
system pozycjonowania obiektów
most
Puławy
Wisła
pomiary geodezyjne
GPS satellite
Global Positioning System
bridge
Pulawy
Vistula river
engineering surveying
Opis:
In this paper the method of geodetic control network elaboration is presented. That network consists of GPS vectors and distances measured classically. The method of reduction of GPS vectors from WGS84 to local coordinate system was described. Common adjustment of GPS vectors and distances in a local coordinate system was performed. The observations set was obtained from measurements of geodetic control network at the construction site of bridge over Vistula River in Pulawy.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 305-308
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of short-terms height changes of the Hans Glacier using quasi-continuous GPS observations
Autorzy:
Walo, J.
Adamek, A.
Puczko, D.
Powiązania:
https://bibliotekanauki.pl/articles/225003.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GPS
satelita GPS
system pozycjonowania obiektów
lodowiec Hans
wysokośc lodowca
pomiary geodezyjne
GPS satellite
Global Positioning System
Hans Glacier
glacier height
engineering surveying
Opis:
The analysis of the measurement results exemplifies very valuable information about the glacier behavior which glaciologists need to understand phenomena occurring on the glacier in different seasons. Beside the experiences collected during this experiment it will be the background to design similar investigations from survey technology and methodology point of view. Basing on these results and experiment analysis we can draw some conclusions: - In the period of the experiment the glacier surface felt down as much as 2 meters. This is the natural tendency and consequences of flowing down the glacier to the fiord and his ablation. - In the figures we could notice wavy nature of the phenomenon of the glacier surface which probably is connected with topography of the fiord bottom, ocean tides affected on the glacier front and some processes connected with the ablation water delivery to the glacier bed. This problem requires a detailed study based on environmental data. - The results of determined heights were periodically disrupted by atmospheric conditions (snowing, wind). - The GPS data used to follow the vertical velocity of the glacier surface let us to monitor the glacier with height accuracy. Also the automation of the survey and post-processing is possible. - There are some disadvantages of using this monitoring technology in surveys: one point of observations, influence of atmospheric conditions on the results of surveys, periodically hard access to equipment and not good enough way of installation of the satellite antenna on the glacier (ablation pole).
Źródło:
Reports on Geodesy; 2007, z. 1/82; 367-373
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The geometrical factors of a navigational systems
Autorzy:
Banachowicz, A.
Banachowicz, G.
Wolski, A.
Powiązania:
https://bibliotekanauki.pl/articles/224416.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
systemy nawigacyjne
pozycjonowanie satelitarne
GPS
system pozycjonowania obiektów
DGPS
nawigajca morska
navigational systems
satellite positioning
Global Positioning System
maritime navigation
Opis:
Vessels engaged in coastal navigation must have their position determined with high accuracy. This can be ensured only by satellite systems such as GPS and GLONASS. The paper presents generalized concepts of geometrical factors of a navigational system. Such factors are used in the analysis of the accuracy of various radionavigational systems aimed at selecting the best system for a given area. The modern process of navigation is described in a four-dimensional space - three geometric dimensions and time. For this reason both the description and analysis of navigational systems should be performed in the same space. The traditional geometric factor of the land-based radionavigational system was generalised to include the factors GDOP, PDOP, HDOP, VDOP and TDOP for the needs of the accuracy analysis of a GPS system. These terms are related to the so-called geometry of navigational system - through mutually related positions of gradients of navigational functions determining position Iines (hyperplanes). They are connected with non-Iinear regression through a probabilistic relation between the measured navigational parameters. Consequently, the concept of geometric factors in the process of navigational parameters estimation can be also extended to include a larger number of dimensions appropriate for the state vector.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 261-267
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic system for GPS tropospheric delay estimation, on-line GPS processing user service and analysis of the results
Autorzy:
Kruczyk, M.
Liwosz, T.
Rogowski, J. B.
Powiązania:
https://bibliotekanauki.pl/articles/224483.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
system pozycjonowania obiektów
GPS
geodezja satelitarna
troposfera
Global Positioning System
satellite geodesy
tropospheric delay
Opis:
This paper describes automatic system for GPS tropospheric delay estimation developed at the Institute of Geodesy and Geodetic Astronomy of the Warsaw University (WUT) LAC. The system is based on BPE (Bernese Processing Engine) and utilizes UltraRapid orbits and EUREF weekly coordinates. We describe processing strategies used in this application and report various experiences leading to start of NRT tropospheric service. We have made many statistical quality analysis of the resulting solutions. Accurate comparisons with ZTD combined product (EPN and IGS) and radiosounding data has been made. The poster presents also other research areas on the GPS data processing performed especially the Internet based service for an on-line GPS processing of the users data. Finally we present some other ideas of our interest how to use tropospheric delay in meteorology and climatology.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 139-151
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
FCM clustering using GPS data for defining level of service criteria of urban streets in indian context
Autorzy:
Bhuyan, P.
Rao, K.
Powiązania:
https://bibliotekanauki.pl/articles/374863.pdf
Data publikacji:
2010
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
klaster
GPS
nawigacja
natężenie ruchu
algorytm Fuzzy C-Means
cluster
Global Positioning System
traffic
Opis:
At present speed ranges for Levels of Service (LOS) categories are not well defined for highly heterogeneous traffic flow on urban streets in Indian context. In this regard a study was carried out in the city of Mumbai in India. The objective of this research work is to define free-flow speed ranges of urban street classes and speed ranges of LOS categories. In this regard speed data were collected using GPS palmtop and Fuzzy C-Means (FCM) clustering is used to define the speed ranges. It is found from this study that speed-ranges for LOS categories in Indian context are lower than that mentioned in Highway Capacity Manual.
Źródło:
Transport Problems; 2010, 5, 4; 105-113
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of pseudolite observations and EDM survey influence on GPS vector estimation
Autorzy:
Rapiński, J.
Zapert, M.
Powiązania:
https://bibliotekanauki.pl/articles/225060.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
system pozycjonowania obiektów
EDM
pomiary geodezyjne
electronic distance meter
GPS
Global Positioning System
engineering surveying
Źródło:
Reports on Geodesy; 2007, z. 1/82; 287-293
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Initial evaluation of usefulness of geodetic coordinates obtained with the use of RTK-GPS corrections generated by Malopolski Satellite Positioning System
Autorzy:
Siejka, Z.
Powiązania:
https://bibliotekanauki.pl/articles/225052.pdf
Data publikacji:
2007
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
GPS
satelita GPS
system pozycjonowania obiektów
RTK GPS
pomiary GPS-RTK
Małopolski System Pozycjonowania Satelitarnego
technika RTK
pomiary geodezyjne
GPS satellite
Global Positioning System
real-time measurements
real time kinematic
Małopolski Satellite Positionning System
engineering surveying
Opis:
The paper presents attempt to find the answer to the question, if the experimentally functioning in Matopolska and Silesia system of reference stations is useful to determine geodetic coordinates, using real time technology when the final result of the measurement is known immediately. To obtain the aim multiple measurements were performed using the RTK-GPS technology on selected points of the POLFER network using corrections generated by the System. On a basis of empirical results of measurements, the evaluation of the usefulness of the system for geodetic applications was performed. Reference stations network of the system ASG-PL which was tested, is one of the so called terrestrial differential systems aiding measurements GPS-RTK (real time kinematic). Networks of the type are very often build in different countries and have national or even continental character.
Źródło:
Reports on Geodesy; 2007, z. 1/82; 309-315
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
GPS Synchronization of Audio Watermarks in the Maritime Automatically Identified Radiotelephony
Autorzy:
Shyshkin, O. V.
Koshevyy, V. M.
Ryaboshapka, I. V.
Powiązania:
https://bibliotekanauki.pl/articles/1841447.pdf
Data publikacji:
2021
Wydawca:
Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:
e-Navigation
audio watermarking
GPS Synchronization
Global Positioning System
VHF
radiotelephony
maritime radiocommunication
Fast Fourier Transformation
Opis:
Audio watermarking (AW) technology in cooperation with GPS synchronization of watermarked frames is proposed for application in the maritime VHF communication for automatic identification of radiotelephone messages. Automatic identification ensures efficient messaging from the very beginning of a radio transmission, while eliminating the human factor inherent in voice identification. AW refers to inaudible embedding of additional data just into the post microphone signal, using standard marine installations without any additional radio channel resources. The designed algorithm is based on data embedding in the Fast Fourier Transform domain with the rate of 32 bit/s. The experimental prototype of the device is designed on the base of micro-controller development kit 32F429IDISCOVERY and GPS module NEO-6M-0-001. Designed system, applied for automatic ship’s identification, provides the full compatibility with the existing radio installation, and does not require replacement of standard VHF transceivers and operational procedures. Besides automatic identification the system may be used in the special applications, for example, by the threat of terrorist attack; generally contributes to navigation safety and information security.
Źródło:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2021, 15, 2; 307-312
2083-6473
2083-6481
Pojawia się w:
TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local geodynamic network in the Pieniny Klippen Belt. Results of seven GPS measurement epochs
Autorzy:
Walo, J.
Czarnecki, K.
Olszak, T.
Pachuta, A.
Szpunar, R.
Powiązania:
https://bibliotekanauki.pl/articles/224450.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
Pieniny
badania geodynamiczne
geodynamika
GPS
system pozycjonowania obiektów
Pieniny Klippen Belt
geodynamic investigations
geodynamics
Global Positioning System
Opis:
The results or seven GPS observational campaigns have demonstrated mutual approaching trend or the Magura Nappe and the Podhale Flysh. Such a trend was disturbed during the period or 1995-2001 when the dam on the Dunajec-river was constructed and artificial lake was created. A hypothesis saying that the filling or the lake resulted in temporarily driving apart the Magura Nappe and Podhale Flysh has been presumed. After 2001 the tectonic structures "started to approach each other". The control points within the Iimits or the Pieniny Klippen Belt have demonstrated oscillatory changes or coordinates in the range of ±15 mm. The results or the last observation epoch show a disturbance or above mentioned trend. It would be due to earthquake in November 2004 that happened near the test field. This hypothesis should be verified next years by the following observational campaigns.
Źródło:
Reports on Geodesy; 2006, z. 1/76; 169-172
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local improvement of the transformation parameters of coordinates
Autorzy:
Savchuk, S.
Tymoshenko, O.
Powiązania:
https://bibliotekanauki.pl/articles/224446.pdf
Data publikacji:
2006
Wydawca:
Politechnika Warszawska. Wydział Geodezji i Kartografii
Tematy:
współrzędne
parametry przekształceń
przekształcenie współrzędnych
GPS
system pozycjonowania obiektów
coordinates
transformation parameters
coordinate transformation
Global Positioning System
Źródło:
Reports on Geodesy; 2006, z. 1/76; 227-231
0867-3179
Pojawia się w:
Reports on Geodesy
Dostawca treści:
Biblioteka Nauki
Artykuł
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