scholarly journals Estimation of Wave Characteristics Based on Global Navigation Satellite System Data Installed on Board Sailboats

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2295
Author(s):  
Paolo De Girolamo ◽  
Mattia Crespi ◽  
Alessandro Romano ◽  
Augusto Mazzoni ◽  
Marcello Di Risio ◽  
...  
Keyword(s):  
Satellite System ◽  
Western Mediterranean ◽  
Real Time Control ◽  
Western Mediterranean Sea ◽  
Time Control ◽  
Self Sufficiency ◽  
Local Wave ◽  
System Data ◽  
Global Navigation Satellite ◽  
Wave Properties

This paper illustrates a methodology to get a reliable estimation of the local wave properties, based on the reconstruction of the motion of a moving sailboat by means of GNSS receivers installed on board and an original kinematic positioning approach. The wave parameters reconstruction may be used for many useful practical purposes, e.g., to improve of autopilots, for real-time control systems of ships, to analyze and improve the performance of race sailboats, and to estimate the local properties of the waves. A Class 40 oceanic vessel (ECO40) left from the port of “Riva di Traiano” located close to Rome (Italy) on 19 October 2014 to perform a non-stop sailing alone around the world in energy and food self-sufficiency. The proposed system was installed on ECO40 and the proposed method was applied to estimate the wave properties during a storm in the Western Mediterranean Sea. The results compared against two sets of hindcast data and wave buoy records demonstrated the reliability of the method.

Linearized J2 and Atmospheric Drag Model for Control of Inner-Formation Satellite System in Elliptical Orbits

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Lu Cao ◽  
Hengnian Li
Keyword(s):  
Formation Control ◽  
Sliding Mode ◽  
Satellite System ◽  
Atmospheric Drag ◽  
Error Feedback ◽  
Real Time Control ◽  
Special Configuration ◽  
Drag Model ◽  
Time Control

A new set of linearized differential equations governing relative motion of inner-formation satellite system (IFSS) is derived with the effects of J2 as well as atmospheric drag. The IFSS consists of the “inner satellite” and the “outer satellite,” this special configuration formation endows its some advantages to map the gravity field of earth. For long-term IFSS in elliptical orbit, the high-fidelity set of linearized equations is more convenient than the nonlinear equations for designing formation control system or navigation algorithms. In addition, to avoid the collision between the inner satellite and the outer satellite, the minimum sliding mode error feedback control (MSMEFC) is adopted to perform a real-time control on the outer satellite in the presence of uncertain perturbations from the system and space. The robustness and steady-state error of MSMEFC are also discussed to show its theoretical advantages than traditional sliding mode control (SMC). Finally, numerical simulations are performed to check the fidelity of the proposed equations. Moreover, the efficacy of the MSMEFC is performed to control the IFSS with high precision.

scholarly journals Can we detect X/M/C-class solar flares from global navigation satellite system data?

2019 ◽  
Vol 12 ◽  
pp. 1004-1005 ◽  
Author(s):  
Semen V. Syrovatskiy ◽  
Yury V. Yasyukevich ◽  
Ilya K. Edemskiy ◽  
Artem M. Vesnin ◽  
Sergey V. Voeykov ◽  
...  
Keyword(s):  
Global Navigation Satellite System ◽  
Solar Flares ◽  
Satellite System ◽  
Navigation Satellite ◽  
System Data ◽  
Global Navigation ◽  
Global Navigation Satellite

scholarly journals Subsidence determination in the Central Valley, California

2018 ◽  
Vol 106 (1) ◽  
pp. 35-42 ◽  
Author(s):  
Marcelo Romero ◽  
Mike Mustafa Berber
Keyword(s):  
Central Valley ◽  
Satellite System ◽  
Geodetic Survey ◽  
Reference Station ◽  
National Geodetic Survey ◽  
The North ◽  
Elevation Changes ◽  
System Data ◽  
Global Navigation Satellite ◽  
Gnss Data

Abstract Twenty four hour GNSS (Global Navigation Satellite System) data acquired monthly for 5 years from 8 CORS (Continuously Operating Reference Station) stations in Central Valley, California are processed and vertical velocities of the points are determined. To process GNSS data, online GNSS data processing service APPS (Automatic Precise Positioning Service) is used. GNSS data downloaded from NGS (National Geodetic Survey) CORS are analyzed and subsidence at these points is portrayed with graphics. It is revealed that elevation changes range from 5 mm uplift in the north to 163 mm subsidence in the southern part of the valley.

Analysis of global navigation satellite system data along the Southern Gas Corridor and estimate of the expected displacements

2020 ◽  
Vol 27 (3) ◽  
pp. 117-141
Author(s):  
Giuliana Rossi ◽  
Riccardo Caputo ◽  
David Zuliani ◽  
Paolo Fabris ◽  
Massimiliano Maggini ◽  
...  
Keyword(s):  
Global Navigation Satellite System ◽  
Satellite System ◽  
Navigation Satellite ◽  
System Data ◽  
Global Navigation ◽  
Global Navigation Satellite

scholarly journals Combined Study of a Significant Mine Collapse Based on Seismological and Geodetic Data—29 January 2019, Rudna Mine, Poland

2020 ◽  
Vol 12 (10) ◽  
pp. 1570
Author(s):  
Maya Ilieva ◽  
Łukasz Rudziński ◽  
Kamila Pawłuszek-Filipiak ◽  
Grzegorz Lizurek ◽  
Iwona Kudłacik ◽  
...  
Keyword(s):  
Surface Deformation ◽  
Radar Data ◽  
Satellite System ◽  
High Frequency Oscillations ◽  
System Data ◽  
Satellite Radar ◽  
Global Navigation Satellite ◽  
Mine Collapse ◽  
Mine Roof

On 29 January 2019, the collapse of a mine roof resulted in a significant surface deformation and generated a tremor with a magnitude of 4.6 in Rudna Mine, Poland. This study combines the seismological and geodetic monitoring of the event. Data from local and regional seismological networks were used to estimate the mechanism of the source and the ground motion caused by the earthquake. Global Navigation Satellite System data, collected at 10 Hz, and processed as a long-term time-series of daily coordinates solutions and short-term high frequency oscillations, are in good agreement with the seismological outputs, having detected several more tremors. The range and dynamics of the deformed surface area were monitored using satellite radar techniques for slow and fast motion detection. The radar data revealed that a 2-km2 area was affected in the six days after the collapse and that there was an increase in the post-event rate of subsidence.

Sign in / Sign up

Export Citation Format

Share Document