Searched for: subject%3A%22Baselines%22
(1 - 20 of 30)

Pages

document
Gabanyi, K.E. (author), Belladitta, S. (author), Frey, S. (author), Orosz, G. (author), Gurvits, L. (author), Rozgonyi, Krisztina (author), An, T. (author), Cao, H (author), Paragi, Z (author), Perger, Krisztina (author)
Active galactic nuclei (AGN) have been observed as far as redshift. They are crucial in investigating the early Universe as well as the growth of supermassive black holes at their centres. Radio-loud AGN with their jets seen at a small viewing angle are called blazars and show relativistic boosting of their emission. Thus, their apparently...
journal article 2023
document
Naeije, M.C. (author), Di Bella, Alessandro (author), Geminale, Teresa (author), Visser, P.N.A.M. (author)
ESA’s Earth explorer mission CryoSat-2 has an ice-monitoring objective, but it has proven to also be a valuable source of observations for measuring impacts of climate change over oceans. In this paper, we report on our long-term ocean data analysis and validation and give our final words on CryoSat-2’s Geophysical Ocean Products (GOP)...
journal article 2023
document
van de Voort, Nick (author)
Remotely Operated Vehicles (ROVs) are positioned relative to an underwater acoustic positioning system: Ultra-Short BaseLine (USBL). The accuracy is affected by refraction artifacts, caused by the variations of the sound velocity in the water column. Accurate positioning would require continuous measuring of the sound velocity profile (SVP)...
master thesis 2022
document
Mohammadloo, Tannaz H. (author), Geen, Matt (author), Sewada, Jitendra S. (author), Snellen, M. (author), Simons, D.G. (author)
Realistic predictions of the contribution of the uncertainty sources affecting the quality of the bathymetric measurements prior to a survey is of importance. To this end, models predicting these contributions have been developed. The objective of the present paper is to assess the performance of the bathymetric uncertainty prediction model for...
journal article 2022
document
van der Leest, Max (author)
Exploiting electric vehicles for maintaining a stable electricity grid is a promising opportunity, which is recognized by both the academic and industrial world. Although the concept is relatively simple, the operating space containing many different stakeholders, rules and legislation is not. There are various practical issues that complicate...
master thesis 2021
document
Molera Calvés, G. (author), Pogrebenko, S. V. (author), Wagner, J. F. (author), Cimò, G. (author), Gurvits, L. (author), Bocanegra-Bahamón, T. M. (author), Duev, D. A. (author), Nunes, N. V. (author)
We present a software package for single-dish data processing of spacecraft signals observed with VLBI-equipped radio telescopes. The Spacecraft Doppler tracking (SDtracker) software allows one to obtain topocentric frequency detections with a sub-Hz precision and reconstructed and residual phases of the carrier signal of any spacecraft or...
journal article 2021
document
Lourenço Baptista, M. (author), Elsa, Elsa M. (author), Goebel, Kai (author)
When the influence of changing operational and environmental conditions, such as temperature and external loading, is not factored out from sensor data it can be difficult to observe a clear deterioration path. This can significantly affect the task of engineering prognostics and other health management operations. To address this problem of...
journal article 2021
document
van Nes, A. (author), Yamu, Claudia (author)
In this chapter, we discuss the application of space syntax in consultancy for urban planning design and practice. First, we present the scientific challenges to tying general understandings and theories to urban planning and design practice. Some elementary principles for communicating results from research and theories to practitioners are...
book chapter 2021
document
Mohammadloo, Tannaz H. (author)
Detailed information about the sea and river bed is of high importance for a large number of applications, such as marine geology, coastal engineering, safe navigation and offshore construction. Acoustic remote sensing techniques have become extremely attractive for obtaining bathymetry measurements and for mapping the sediment properties, due...
doctoral thesis 2020
document
den Ottelander, Tom (author)
Computer vision tasks, like supervised image classification, are effectively tackled by convolutional neural networks, provided that the architecture, which defines the structure of the network, is set correctly. Neural Architecture Search (NAS) is a relatively young and increasingly popular field that is concerned with automatically optimizing...
master thesis 2020
document
Morales Martinez, Francisco (author)
Weak baselines have been present in Information Retrieval (IR) for<br/>decades. They have been associated with IR progress stagnation, baseline<br/>selection bias to publish results more readily, and models’ effectiveness<br/>reproducibility issues that hinder the validation of results by independent<br/>research teams. Weak baselines have been...
master thesis 2020
document
Chen, Zhiyang (author), Dong, Xichao (author), Li, Y. (author), Hu, Cheng (author)
The single-pass geosynchronous synthetic aperture radar interferometry (GEO InSAR) adopts the formation of a slave satellite accompanying the master satellite, which can reduce the temporal decorrelation caused by atmospheric disturbance and observation time gap between repeated tracks. Current formation design methods for spaceborne SAR are...
journal article 2020
document
Mohammadloo, Tannaz H. (author), Snellen, M. (author), Simons, D.G. (author)
Realistic predictions of the contribution of the various sources affecting the quality of the bathymetric measurements prior to a survey are of importance to ensure sufficient accuracy of the soundings. To this end, models predicting these contributions have been developed. The objective of the present paper is to assess the performance of...
journal article 2020
document
Yang, Wanning (author)
Community question answering (CQA) platforms provide a social environment for users to share knowledge online. Users can submit complex and subjective questions on CQA platforms and then derive the desired answer from other community users. A large number of user-generated data has been produced by various CQA sites (e.g., Quora, StackExchange)...
master thesis 2019
document
Mao, X. (author)
Precise absolute and relative orbit determination, referred to as Precise Orbit Determination (POD) and Precise Baseline Determination (PBD), are a prerequisite for the success of many Low Earth Orbit (LEO) satellite missions. With the spaceborne, high-quality, multi-channel, dual-frequency Global Positioning System (GPS) receivers, typically a...
doctoral thesis 2019
document
Mohammadloo, Tannaz H. (author), Snellen, M. (author), Amiri Simkooei, A. (author), Simons, D.G. (author)
Nowadays Multi-Beam Echo-Sounder (MBES) derived bathymetry is used for a large range of applications. However, these measurements are affected by the uncertainties inherent to the MBES. Since the development of the depth uncertainty prediction model, MBES systems have been improved noticeably. The present contribution addresses the importance of...
conference paper 2019
document
Mao, X. (author), Visser, P.N.A.M. (author), van den IJssel, J.A.A. (author)
Precise orbit determination was investigated for a satellite constellation comprised of two different missions, the CHAllenging Minisatellite Payload (CHAMP) satellite and the Gravity Recovery And Climate Experiment (GRACE) twin satellites. The orbital planes of these two missions aligned closely during March to May 2005, allowing precise...
journal article 2019
document
Mao, X. (author), Visser, P.N.A.M. (author), van den IJssel, J.A.A. (author)
Baseline determination for the European Space Agency Swarm magnetic field mission is investigated. Swarm consists of three identical satellites -A, -B and -C. The Swarm-A and -C form a pendulum formation whose baseline length varies between about 30 and 180 km. Swarm-B flies in a higher orbit, causing its orbital plane to slowly rotate with...
journal article 2019
document
Wang, Kan (author), Khodabandeh, Amir (author), Teunissen, P.J.G. (author)
For long-baseline over several hundreds of kilometers, the ionospheric delays that cannot be fully removed by differencing observations between receivers hampers rapid ambiguity resolution. Compared with forming ionospheric-free linear combination using dual- or triple-frequency observations, estimating ionospheric delays using uncombined...
journal article 2018
document
Mao, X. (author), Visser, P.N.A.M. (author), van den IJssel, J.A.A. (author)
The European Space Agency (ESA) Swarm mission is a satellite constellation launched on 22 November 2013 aiming at observing the Earth geomagnetic field and its temporal variations. The three identical satellites are equipped with high-precision dual-frequency Global Positioning System (GPS) receivers, which make the constellation an ideal...
journal article 2018
Searched for: subject%3A%22Baselines%22
(1 - 20 of 30)

Pages