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Flight planning in multi-unmanned aerial vehicle systems: Nonconvex polygon area decomposition and trajectory assignment
(SAGE PUBLICATIONS INC, 2021-02-25)
Article
Open AccessNowadays, it is quite common to have one unmanned aerial vehicle (UAV) working on a task but having a team of UAVs is still rare. One of the problems that prevent us from using teams of UAVs more frequently is flight ... -
Characterization of three-dimensional vortical structures in the wake past a circular cylinder in the transitional regime
(2020)
Article
Open AccessThe flow past a circular cylinder in the transitional regime at Re = 2000 has been thoroughly investigated via well resolved direct numerical simulation with a spectral element code. Spanwise periodic boundary conditions ... -
Polar electron content from GPS data-based global ionospheric maps: assessment, case studies, and climatology
(2020-04-22)
Article
Open AccessThe electron content distribution of the north and south polar ionosphere from 2001 to the beginning of 2019 is analyzed by using the UQRG global ionospheric map (GIM) of vertical total electron content (VTEC), computed ... -
A generalized supervised classification scheme to produce provincial wetland inventory maps: an application of Google Earth Engine for big geo data processing
(2019-10-02)
Article
Open AccessWetlands are important natural resources due to their numerous ecological services. Consequently, identifying their locations and extents is imperative. The stability, repeatability, cost-effectiveness, multi-scale coverage, ... -
Satellite selection in the context of an operational GBAS
(2019-02-27)
Article
Open AccessWhen incorporating multiple constellations into future ground based augmentation systems (GBAS), a problem with limited VDB (VHF data broadcast) capacity might arise. Furthermore, the number of airborne receiver tracking ... -
Analysis of jet transport-based geostationary trajectory uncertainty propagation
(2020-03-31)
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Open Access -
A picture of solar-sail heteroclinic enhanced connections between Lissajous libration point orbits
(2020-03-09)
Article
Restricted access - publisher's policyThe dynamics of solar-sail maneuvers are conceptually different from classical control maneuvers where one considers impulsive changes in the velocity of a spacecraft. Solar-sail orbits are continuous in both position and ... -
Rotation–translation coupling analysis on perturbed spacecraft relative translational motion
(2020-10-17)
Article
Restricted access - publisher's policyThis paper explores an accurate and complete spacecraft six-degree-of-freedom coupled relative motion model using the dual quaternion representation. Based on this technique, we build a scheme capable of describing both ... -
Counter a drone in a complex neighborhood area by Deep Reinforcement Learning
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-18)
Article
Open AccessCounter-drone technology by using artificial intelligence (AI) is an emerging technology and it is rapidly developing. Considering the recent advances in AI, counter-drone systems with AI can be very accurate and efficient ... -
First results of phytoplankton spatial dynamics in two NW-Mediterranean bays from chlorophyll-a estimates using sentinel 2: potential implications for aquaculture
(Multidisciplinary Digital Publishing Institute (MDPI), 2019-07-25)
Article
Open AccessShellfish aquaculture has a major socioeconomic impact on coastal areas, thus it is necessary to develop support tools for its management. In this sense, phytoplankton monitoring is crucial, as it is the main source of ... -
Galileo broadcast ephemeris and clock errors analysis: 1 January 2017 to 31 July 2020
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-11-29)
Article
Open AccessA preliminary analysis of Galileo F/NAV broadcast Clock and Ephemeris is performed in this paper with 43 months of data. Using consolidated Galileo Receiver Independent Exchange (RINEX) navigation files, automated navigation ... -
Estimation of polar depletion regions by VTEC contrast and watershed enhancing
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Article
Open AccessThis article presents a method for determining near-Pole ionization depletion regions and troughs from global navigation satellite system (GNSS) vertical total electron content (VTEC) maps. To define the regions, we use ...
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