Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Jacek Kudrys"'
Publikováno v:
Metrology and Measurement Systems, Vol vol. 30, Iss No 3, Pp 499-505 (2023)
Day-boundary discontinuity (DBD) is an effect present in precise GNSS satellite orbit and clock products originating from the method used for orbit and clock determination. The non-Gaussian measurement noise and data processing in 24 h batches are re
Externí odkaz:
https://doaj.org/article/c3540c17118245d0acf783c5aaf36521
Publikováno v:
Earth, Planets and Space, Vol 72, Iss 1, Pp 1-4 (2020)
Abstract Allan variances and its related methods are commonly used to analyse a sequence of data in the time domain to measure frequency stability of oscillators. It allows for a determination of noise type as a function of the averaging time. This m
Externí odkaz:
https://doaj.org/article/b9c7f45085664646948deb0883c1c4a2
Publikováno v:
Remote Sensing, Vol 14, Iss 13, p 3226 (2022)
Changes of the antenna models on permanent global navigation satellite system (GNSS) stations can lead to jumps and discontinuities in the coordinate time series. In this paper, the results of research on the adequacy of the antenna phase centre corr
Externí odkaz:
https://doaj.org/article/f8338a90717f46dab8d829b9ee1dd6c1
Autor:
Jacek Kudrys
Publikováno v:
Budownictwo i Architektura, Vol 18, Iss 4 (2020)
In the presented study multi-year time series of changes in the L1 pseudo-range multipath are analysed. Data from 8 stations of the EUREF Permanent Network (EPN) were used in the study. Periodic components present in the signal and their stability ov
Externí odkaz:
https://doaj.org/article/538b19554298454e954aa7763953161e
Publikováno v:
Energies, Vol 15, Iss 5, p 1668 (2022)
Precise data processing from the Global Navigation Satellite Systems (GNSS) reference station network is mainly based on a combination of double-differenced carrier phase and code observations. This approach allows most of the measurement errors to b
Externí odkaz:
https://doaj.org/article/e55fcba076d44fffbd8390f810b82f99
Publikováno v:
Energies, Vol 14, Iss 21, p 7155 (2021)
Onboard satellite clocks are the basis of Global Navigation Satellite Systems (GNSS) operation, and their revolution periods are at the level of 2 per day (about 12 h) in the case of the Medium Earth Orbit (MEO) satellites. In this work, the authors
Externí odkaz:
https://doaj.org/article/ce9b705935214153839850f4e3ad4a47
Autor:
Sorin Nistor, Norbert-Szabolcs Suba, Ahmed El-Mowafy, Michal Apollo, Zinovy Malkin, Eduard Ilie Nastase, Jacek Kudrys, Kamil Maciuk
Publikováno v:
Remote Sensing, Vol 13, Iss 17, p 3478 (2021)
The seasonal signal determined by the Global Navigation Satellite System (GNSS), which is captured in the coordinate time series, exhibits annual and semi-annual periods. This signal is frequently modelled by two periodic signals with constant amplit
Externí odkaz:
https://doaj.org/article/a07c0abf1a8a45f29db64b6af74356b0
Autor:
Stanisław Szombara, Marta Róg, Krystian Kozioł, Kamil Maciuk, Bogdan Skorupa, Jacek Kudrys, Tomáš Lepeška, Michal Apollo
Publikováno v:
Energies, Vol 14, Iss 18, p 5731 (2021)
Advances in remote data acquisition techniques have contributed to the flooding of society with spatial data sets and information. Widely available spatial data sets, including digital terrain models (DTMs) from aerial laser scanning (ALS) data, are
Externí odkaz:
https://doaj.org/article/09a4067d117a4c35b131bb8995d8c62f
Autor:
Sorin Nistor, Norbert-Szabolcs Suba, Kamil Maciuk, Jacek Kudrys, Eduard Ilie Nastase, Alexandra Muntean
Publikováno v:
Remote Sensing, Vol 13, Iss 14, p 2783 (2021)
This study evaluates the EUREF Permanent Network (EPN) station position time series of approximately 200 GNSS stations subject to the Repro 2 reprocessing campaign in order to characterize the dominant types of noise and amplitude and their impact on
Externí odkaz:
https://doaj.org/article/66fa73c9a3744094b0c3e853b2844d7c
Autor:
Kamil Maciuk, Michal Apollo, Joseph M. Cheer, Ondřej Konečný, Krystian Kozioł, Jacek Kudrys, Joanna Mostowska, Marta Róg, Bogdan Skorupa, Stanisław Szombara
Publikováno v:
Remote Sensing, Vol 13, Iss 6, p 1111 (2021)
Mountain peaks and their altitude have been of interest to researchers across disciplines. Measurement methods and techniques have changed and developed over the years, leading to more accurate measurements and, consequently, more accurate determinat
Externí odkaz:
https://doaj.org/article/8ade6cd5be5a42e8b86feec4c84e5e7b