C/N0 estimators for high-sensitivity snapshot GNSS receiversGPS Solutions - Tập 22 - Trang 1-11 - 2018
David Gómez-Casco, José A. López-Salcedo, Gonzalo Seco-Granados
We address the problem of estimating the carrier-to-noise ratio (C/N0) in weak signal conditions. There are several environments, such as forested areas, indoor buildings and urban canyons, where high-sensitivity global navigation satellite system (HS-GNSS) receivers are expected to work under these reception conditions. The acquisition of weak signals from the satellites requires the use of post-...... hiện toàn bộ
Attitude determination by integration of MEMS inertial sensors and GPS for autonomous agriculture applicationsGPS Solutions - Tập 16 - Trang 41-52 - 2011
Yong Li, Mahmoud Efatmaneshnik, Andrew G. Dempster
Integration of Global Positioning System (GPS) and Inertial Navigation System (INS) technologies, which has widespread usage in industry, is also regarded as an ideal solution for automated agriculture because it fulfils the accuracy, reliability and availability requirements of industrial and agricultural applications. Agriculture applications use position, velocity and heading information for au...... hiện toàn bộ
On the temperature sensitivity of multi-GNSS intra- and inter-system biases and the impact on RTK positioningGPS Solutions - Tập 24 - Trang 1-14 - 2020
Xiaolong Mi, Baocheng Zhang, Robert Odolinski, Yunbin Yuan
The intra-system biases, including differential code biases (DCBs) and differential phase biases (DPBs), are generally defined as the receiver-dependent hardware delays between different frequencies in a single global navigation satellite system (GNSS) constellation. Likewise, the inter-system biases (ISBs) are the differential code and phase hardware delays between different GNSSs, which are of g...... hiện toàn bộ
On the accuracy of the GPS L2 observable for ionospheric monitoringGPS Solutions - Tập 22 - Trang 1-7 - 2017
Anthony M. McCaffrey, P. T. Jayachandran, Richard B. Langley, Jean-Marie Sleewaegen
The introduction of the unencrypted global positioning system (GPS) L2 civil (L2C) signal has the potential to improve measurements made with the L2 frequency, an important observable in GPS-based ionospheric research and monitoring. Recent work has shown significant differences between the legacy L2P(Y) and L2C-derived total electron content rate of change index (ROTI). This difference is observe...... hiện toàn bộ
Can sea ice thickness be retrieved using GNSS-interferometric reflectometry?GPS Solutions - Tập 26 - Trang 1-16 - 2022
Feng Wang, Dongkai Yang, Bo Zhang, Lei Yang
A method for retrieving snow and sea ice thickness is developed and simulations are conducted to evaluate the feasibility of the proposed method. When using a defined envelope amplitude and phase, for the snow-free case, RMSEs of 0.24 and 0.34 m can be obtained; for the snow-covered case, the RMSEs of the retrieved sea ice thickness decrease to 0.45 and 0.48 m, and the RMSEs of the retrieved snow ...... hiện toàn bộ
Improved time-differenced cycle slip detect and repair for GNSS undifferenced observationsGPS Solutions - Tập 22 - Trang 1-13 - 2017
Guorui Xiao, Michael Mayer, Bernhard Heck, Lifen Sui, Tian Zeng, Dongming Zhao
GNSS undifferenced signal processing, in which the individual signal of each frequency is treated as independent observable, has drawn increasing interest in GNSS community. However, undifferenced signal processing brings new challenges for cycle slip detection and repair. One important feature is the carrier frequency identification of cycle slips since observations are processed separately. An a...... hiện toàn bộ