Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Aydin Ustun"'
Publikováno v:
Earth Science Informatics. 15:713-724
Today’s geodetic community starts to model an accurate gravimetric geoid within a 5 mm level, which entirely meets the demands of all technical and geoscientific studies. In this context, a wide range of geoid modelling methods have been published
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7dd0a5a522051a839e6f5ae1721cbef
https://doi.org/10.1007/s12145-021-00713-3
https://doi.org/10.1007/s12145-021-00713-3
In this study, we investigate systematic errors in our temporal gravity solutions computed using the improved energy balance approach (EBA) (Shang et al. 2015) by reprocessing the GRACE JPL RL03 L1B data product. Our processing consists of two steps:
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5078dc5c074e3ed5334d57ececbc7d2
https://doi.org/10.5194/egusphere-egu2020-11504
https://doi.org/10.5194/egusphere-egu2020-11504
Autor:
Aydin Ustun, Sefa Yalvaç
Publikováno v:
Earth Science Informatics. 11:359-371
Multipath, a highly autocorrelated signal is observable phenomena during time periods longer than the sidereal period of Global Positioning System (GPS) satellites in their constellations. Multipath pattern and sidereal repeat time interaction are ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a453db6f624aa37013b491411b1a4fd
https://doi.org/10.1007/s12145-017-0331-5
https://doi.org/10.1007/s12145-017-0331-5
Publikováno v:
Journal of Spatial Science. 62:337-352
In the not very distant past, many organisations began providing online GNSS data-processing services. Some of these services work on the differential positioning principle and some use precise point positioning. Moreover, these services provide the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ebd01403ed88226cc887e76208cd12f
https://doi.org/10.1080/14498596.2017.1292964
https://doi.org/10.1080/14498596.2017.1292964
Publikováno v:
Survey Review. 50:26-35
It is investigated to what extent EGM96 affects the accuracy of digital elevation model (DEM) produced from the shuttle radar topography mission (SRTM). Global and regional analysis of EGM96 compared with EGM2008 indicate that locally there are large
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ec4e80f0bff81a0a51090625acae88a
https://doi.org/10.1080/00396265.2016.1218159
https://doi.org/10.1080/00396265.2016.1218159
Publikováno v:
2017 Signal Processing Symposium (SPSympo).
PPP (Precise Point Positioning) is a relatively new GNSS (Global Navigation Satellite System) method that enables position determinations using a single receiver. Being able to survey with a single receiver makes this approach more attractive and aff
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b34003e7feee4a2bd4083207399f72c7
https://doi.org/10.1109/sps.2017.8053691
https://doi.org/10.1109/sps.2017.8053691
Autor:
Aydin Ustun, Ramazan Alpay Abbak
Publikováno v:
Earth Science Informatics. 8:255-265
Nowadays, the geodetic community has aimed to determine 1-cm accuracy gravimetric geoid model, which satisfies the demands of most engineering applications. However, the gravimetric geoid determination is a difficult mission which needs an exclusive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7702c4e031858d0f5191b5be2ec9f1e4
https://doi.org/10.1007/s12145-014-0149-3
https://doi.org/10.1007/s12145-014-0149-3
Autor:
Aydin Ustun, Emma Hatton, Pedro Guimarães, Daniele Perissin, Karsten Spaans, Matus Bakon, Joaquim J. Sousa, Fatma Canaslan Comut, Milan Lazecky, David Kocich, Yuxiao Qin, Pablo J. Gonzalez Mendez
International Conference on ENTERprise Information Systems / International Conference on Project MANagement / International Conference on Health and Social Care Information Systems and Technologies (CENTERIS/ProjMAN/HCist) -- OCT 05-07, 2016 -- Porto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a9feb01c0ae1624eed4de2a9e6e5f3cd
https://eprints.whiterose.ac.uk/106320/1/1-s2.0-S1877050916322852-main.pdf
https://eprints.whiterose.ac.uk/106320/1/1-s2.0-S1877050916322852-main.pdf
Comparison of the KTH and remove–compute–restore techniques to geoid modelling in a mountainous area
Publikováno v:
Computers & Geosciences. 48:31-40
In mountainous regions, a gravimetric geoid determination is a difficult task which needs special attention to obtain reliable results satisfying the demands, e.g. of the engineering infrastructure. The present study compares the KTH (Royal Institute
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b41c07e678c87152fa4fb17f50db421
https://doi.org/10.1016/j.cageo.2012.05.019
https://doi.org/10.1016/j.cageo.2012.05.019
Publikováno v:
Measurement. 45:1742-1746
Accuracies of relative positioning techniques namely rapid static, pseudo-kinematic, kinematic, and real-time kinematic are investigated to determine their performances against static survey technique that yields the most precise results. Measurement
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::517d2dccaec53a884202a01e4dd961b8
https://doi.org/10.1016/j.measurement.2012.04.010
https://doi.org/10.1016/j.measurement.2012.04.010