Results 41 to 50 of about 1,229 (188)

ANALYSIS OF THE EGNOS IONOSPHERIC MODEL AND ITS IMPACT ON THE INTEGRITY LEVEL IN THE CENTRAL EASTERN EUROPE REGION [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
The demand for Global Navigation Satellite System in safety-related applications has rapidly increased in the last few years. The foreseeable release of self-driving cars is already showing the importance of the integrity concept of satellite-based ...
B. Lupsic, B. Takács
doaj   +1 more source

Markov Chain‐Based Stochastic Modeling of Deep Signal Fading: Availability Assessment of Dual‐Frequency GNSS‐Based Aviation Under Ionospheric Scintillation

Space Weather, Volume 19, Issue 9, September 2021., 2021
Abstract Deep signal fading due to ionospheric scintillation severely impacts global navigation satellite system (GNSS)‐based applications. GNSS receivers run the risk of signal loss under deep fading, which directly leads to a significant decrease in navigation availability.
Andrew K. Sun, Hyeyeon Chang, Sam Pullen, Hyosub Kil, Jiwon Seo, Y. Jade Morton, Jiyun Lee   +6 more
wiley   +1 more source

Grazed temporary grass‐clover leys in crop rotations can have a positive impact on soil quality under both conventional and organic agricultural systems

European Journal of Soil Science, Volume 72, Issue 4, Page 1513-1529, July 2021., 2021
Abstract Soil quality (SQ) is the ability of soil to provide ecosystem functions and services. Implementation of a certain agricultural system can affect SQ and therefore play an essential role in achieving sustainable agriculture. The aim of this study was to explore how agricultural systems (conventional vs.
Caio F. Zani, John Gowing, Geoffrey D. Abbott, James A. Taylor, Elisa Lopez‐Capel, Julia Cooper   +5 more
wiley   +1 more source

Ground‐Based GNSS and C/NOFS Observations of Ionospheric Irregularities Over Africa: A Case Study of the 2013 St. Patrick’s Day Geomagnetic Storm

Space Weather, Volume 19, Issue 2, February 2020., 2021
Abstract In this paper, the variations of ionospheric irregularities have been studied using C/NOFS, ground‐based GNSS and magnetometer measurements in Africa during the St. Patrick geomagnetic storm of March 17, 2013. The latitudinal distribution of irregularities was examined using GNSS‐ROTI maps covering longitude 25°–45°E.
P. O. Amaechi, E. O. Oyeyemi, A. O. Akala, H. E. Messanga, S. K. Panda, Gopi K. Seemala, J. O. Oyedokun, R. Fleury, C. Amory‐Mazaudier   +8 more
wiley   +1 more source

Electronic Guidance Cane for Users Having Partial Vision Loss Disability

Wireless Communications and Mobile Computing, Volume 2021, Issue 1, 2021., 2021
Vision is, no doubt, one of the most important and precious gifts to humans; however, there exists a fraction of visually impaired ones who cannot see properly. These visually impaired disabled people face many challenges in their lives—like performing routine activities, e.g., shopping and walking.
Asad Khan, Muhammad Awais Ashraf, Muhammad Awais Javeed, Muhammad Shahzad Sarfraz, Asad Ullah, Muhammad Mehran Arshad Khan, Mamoun Alazab   +6 more
wiley   +1 more source

Safety arguments for next generation location aware computing [PDF]

, 2010
Concerns over the accuracy, availability, integrity and continuity of Global Navigation Satellite Systems (GNSS) have limited the integration of GPS and GLONASS for safety-critical applications.
C.M. Holloway, Holloway, C.M., C.W. Johnson, Johnson, Chris, Johnson, C.W.   +4 more
core   +1 more source

Evolution of SBAS/EGNOS Enabled Devices in Maritime [PDF]

TransNav, 2021
The maritime sector was one of the first communities that recognized and exploited the opportunities and advantages provided by Global Navigation Satellite Systems (GNSS).
Manuel Lopez, Virginia Anton
doaj   +1 more source

Satellite Navigation and Communication Integration Based on Correlation Domain Indefinite Pulse Position Modulation Signal

Wireless Communications and Mobile Computing, Volume 2021, Issue 1, 2021., 2021
Ubiquitous signal coverage is a basic demand of Internet of Things (IoT) communications, which meets the feature of satellite communications. Infinite user number is a basic demand of IoT location‐based services, which meets the feature of Global Navigation Satellite System (GNSS).
Deyue Zou, Shouchuan Ma, Weizh Meng
wiley   +1 more source

A Novel Rapid GNSS Network Solution in Mountainous Region Monitoring considering the Tropospheric Delay at Ground Points

Journal of Sensors, Volume 2021, Issue 1, 2021., 2021
Due to the short peak observation time of global navigation satellite systems (GNSS), the accuracy of the tropospheric delay estimation and the positioning are poor. In this study, a rapid GNSS network solution for mountainous regions is presented. The high‐precision tropospheric delay at ground points is obtained from long‐term ground observation data
Guangwei Jiang, Panlong Wang, Bin Wang, Chuanlu Cheng, Sang-Hoon Hong   +4 more
wiley   +1 more source

Application of the SBAS/EGNOS positioning method to determine UAV coordinates [PDF]

Przegląd Komunikacyjny, 2022
: The article presents the results of research on determining the UAV (Unmanned Aerial Vehicle) position using the SBAS (Satellite Based Augmentation System) positioning method for the EGNOS (European Geostationary Navigation Overlay Service) support ...
Henryk Jafernik, Kamil Krasuski, Janusz Ćwiklak, Damian Wierzbicki   +3 more
doaj   +1 more source