Browsing SINTEF Open by Author "Sokolova, Nadezda"
Now showing items 1-20 of 20
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Advanced RFI Detection, Alert and Analysis System Design and Monitoring Campaign Results
Morrison, Aiden J; Sokolova, Nadezda; Swinden, Richard; Musumeci, Luciano; Caparra, Gianluca (Journal article, 2022)The Advanced Radio Frequency Interference (RFI) Detection Analysis and Alerting System (ARFIDAAS) projects focus on providing Global Navigation Satellite System (GNSS) users and GNSS-based service providers with low latency ... -
Analysis of Spatial Decorrelation of Small-Scale Tropospheric Delay Using High-Resolution NWP Data
Håkegård, Jan Erik; Sokolova, Nadezda; Morrison, Aiden J (Peer reviewed; Journal article, 2023)This paper contains results from a study where numerical weather product (NWP) data provided by MET Norway were used to estimate the differential zenith tropospheric delay (dZTD) for an area including Scandinavia, Finland ... -
Automatic GNSS RFI Classification Challenges
Diez, Anja; Morrison, Aiden J; Sokolova, Nadezda (Journal article, 2022)This article describes the real-world challenges that are encountered when trying to automatically categorize and classify the radio frequency interference (RFI) events captured in the GNSS signal bands by an international ... -
Characterization of the GNSS RFI Threat to DFMC GBAS Signal Bands
Sokolova, Nadezda; Morrison, Aiden J; Diez, Anja (Peer reviewed; Journal article, 2022)This article presents analysis results from a long-term multi-site Global Navigation Satellite System (GNSS) Radio Frequency Interference (RFI) monitoring campaign in the context of Ground Based Augmentation System (GBAS) ... -
Design of a Multiband Global Navigation Satellite System Radio Frequency Interference Monitoring Front-End with Synchronized Secondary Sensors
Morrison, Aiden J; Sokolova, Nadezda; Curran, James (Journal article; Peer reviewed, 2018)This paper investigates the challenges of developing a multi-frequency radio frequency interference (RFI) monitoring and characterization system that is optimized for ease of deployment and operation as well as low per ... -
Differential ZTD estimation based on high spatial resolution NWP data for the Nordic countries
Håkegård, Jan Erik; Sokolova, Nadezda; Morrison, Aiden J (Chapter, 2022)This paper contains results from a study where Numerical Weather Product (NWP) data provided by MET Norway are used to estimate the differential zenith tropospheric delay (dZTD) for an area covering Scandinavia, Finland ... -
Do modern multi-frequency civil receivers eliminate the ionospheric effect?
Sokolova, Nadezda; Morrison, Aiden J; Curran, James; Petovello, Mark (Journal article, 2017) -
GNSS-Denied Navigation using Direction of Arrival from Low-Cost Software Defined Radios and Signals of Opportunity
Winter, Adrian; Sokolova, Nadezda; Morrison, Aiden J; Johansen, Tor Arne (Peer reviewed; Journal article, 2022)This paper describes a novel navigation system for outdoor navigation in conditions where reliable satellite navigation cannot be assumed. It is build around inexpensive of-the-shelf hardware and could be used with several ... -
High Latitude Ionospheric Gradient Observation Results from a Multi-Scale Network
Sokolova, Nadezda; Morrison, Aiden J; Jacobsen, Knut Stanley (Peer reviewed; Journal article, 2023)In this article, a cluster comprised of eight Continuously Operating Reference Station (CORS) receivers surrounding five supplemental test stations located on much shorter baselines is used to form a composite multi-scale ... -
Implementation and Test of a Low Cost GBAS Subset Airborne Receiver Experimental Platform for UAVs
Toker, Kadir Atilla; Sokolova, Nadezda; Johansen, Tor Arne (Chapter, 2022)A Ground Based Augmentation System (GBAS) provides differential corrections to Global Navigation Satellite Systems (GNSS) using VHF Data Broadcast (VDB) Equipment. This paper discusses development and test of an experimental ... -
Improving Computer Vision-Based Perception for Collaborative Indoor Navigation
Ruotsalainen, Laura; Morrison, Aiden J; Makela, Maija; Rantanen, Jesperi; Sokolova, Nadezda (Peer reviewed; Journal article, 2021)Collaborative navigation is the most promising technique for infrastructure-free indoor navigation for a group of pedestrians, such as rescue personnel. Infrastructure-free navigation means using a system that is able to ... -
Jammertest 2022: Jamming and Spoofing Lessons Learned
Morrison, Aiden J; Sokolova, Nadezda; Solberg, Anders Martin; Gerrard, Nicolai; Rødningsby, Anders; Hauglin, Harald; Rødningen, Thomas; Dahlø, Tor Ole (Peer reviewed; Journal article, 2023)Jammertest 2022 was a week-long series of satellite navigation and timing signal jamming and spoofing exercises carried out on the Norwegian island of Andøya in September of 2022. Organized via a collaboration between the ... -
Multi-band Multi-site GNSS RFI Monitoring Results after a Year of Operation
Morrison, Aiden J; Sokolova, Nadezda (Peer reviewed; Journal article, 2021)An international network of Radio Frequency Interference (RFI) monitoring stations covering all L-band Global Navigation Satellite System (GNSS) signals has provided large amounts of data on the occurrence rates and ... -
Navigation Algorithm-Agnostic Integrity Monitoring based on Solution Separation with Constrained Computation Time and Sensor Noise Overbounding
Bosdelekidis, Vasileios; Bryne, Torleiv Håland; Sokolova, Nadezda; Johansen, Tor Arne (Peer reviewed; Journal article, 2022)Integrity monitoring (IM) in autonomous navigation has been extensively researched, but currently available solutions are mainly applicable to specific algorithms and sensors, or limited by linearity or 'Gaussianity' ... -
Nonlinear observers for integrated INS\/GNSS navigation: implementation aspects
Bryne, Torleiv Håland; Hansen, Jakob Mahler; Rogne, Robert Harald; Sokolova, Nadezda; Fossen, Thor I.; Johansen, Tor Arne (Peer reviewed; Journal article, 2017)Navigation is a term with broad usage in everyday life and can mean the act of moving, moving through an unknown environment, ascertaining a craft's position, or even browsing on the Internet. Originally, the term meant ... -
On the cleansing and inspection of GPS ephemeris data 2000–2016
Lie, Arne; Morrison, Aiden; Sokolova, Nadezda; Topland, Morten (Chapter, 2017)Archived GPS ephemeris data for years 2000-2016 is investigated by cleansing and precision measures. The goal of this work was twofold: (1) to reveal and remove incorrect ephemeris data so that the cleansed data is as close ... -
Phase scintillation decorrelation impact on multi-frequency users
Sokolova, Nadezda; Morrison, Aiden; Curran, James; Bavaro, Michele (Journal article; Peer reviewed, 2017)This paper discusses the phase scintillation decorrelation as observed between dual and triple frequency civil GNSS signals. Comparisons are made between the characteristics of data collected in Norway during events of ... -
Public road infrastructure inventory in degraded global navigation satellite system signal environments
Sokolova, Nadezda; Morrison, Aiden; Haakonsen, Trond Arve (Journal article; Peer reviewed, 2015)Recent advancement of land-based mobile mapping enables rapid and cost-effective collection of highquality road related spatial information. Mobile Mapping Systems (MMS) can provide spatial information with subdecimeter ... -
Radio-Frequency Interference Considerations for Utility of the Galileo E6 Signal Based on Long-Term Monitoring by ARFIDAAS
Morrison, Aiden J; Sokolova, Nadezda; Gerrard, Nicolai; Rødningsby, Anders; Rost, Christian; Ruotsalainen, Laura (Peer reviewed; Journal article, 2023)The extent to which navigation signals in the E6 band may be impacted by shared spectrum allocations might be underappreciated. This paper presents top-level observations from a multi-year international radio frequency ... -
Study of time- and distance-dependent degradations of network RTK performance at high latitudes in Norway
Jacobsen, Knut Stanley; Sokolova, Nadezda; Ouassou, Mohammed; Solberg, Anders Martin (Peer reviewed; Journal article, 2023)In this study we examine the performance of a network real-time kinematic (NRTK) positioning service at high latitudes (≈70 deg N). The NRTK used is the Norwegian national positioning service “CPOS”. To test the performance, ...