Showing papers in "Advances in Space Research in 2018"

TL;DR: Theseus as mentioned in this paper is a space mission concept aimed at exploiting Gamma-Ray Bursts for investigating the early Universe and at providing a substantial advancement of multi-messenger and time-domain astrophysics.

TL;DR: Hera will investigate the smallest asteroid visited so far, providing a unique opportunity to shed light on the role cohesion and Van der Waals forces may play in the formation and resulting internal structure of such small bodies.

TL;DR: The present study reviews the fundamental concepts and underlying assumptions of signal-in-space range error (SISRE) analyses and presents a harmonized framework for multi-GNSS performance monitoring based on the comparison of broadcast and precise ephemerides to contribute to a better understanding and harmonization of multi- GNSS SISRE analyses and their use as key performance indicators for the various constellations.

TL;DR: In this paper, a 25-year-long sea level record from high-precision multi-mission satellite altimetry has been provided, from which global mean sea level rise and superimposed interannual and regional variability can be derived.

TL;DR: Differ from traditional methods, null-space and specialized curve are synthesized to provide a novel viewpoint for trajectory planning of free-floating space robot and a constrained differential evolution scheme with premature handling strategy is implemented to find the optimal solution of the design variables.

TL;DR: In this article, the authors present a comprehensive review of meteor generated shock wave phenomena, from the aspect of both meteor science and hypersonic gas dynamics, and discuss key aspects of both shock generation and propagation, including the importance of hydrodynamic shielding that develops around the meteoroid.

TL;DR: The recent discovery of the electromagnetic counterpart of the gravitational wave source GW170817, has demonstrated the huge informative power of multi-messenger observations as discussed by the authors, and the important role of the Transient High Energy Sky and Early Universe Surveyor (THESEUS) mission concept accepted by ESA for phase A study.

TL;DR: In this article, using absolute scalar magnetometer, vector field magnetometer and electric field instrument on board Swarm satellites, GPS (Global Positioning System) measurements, MODIS-Aqua satellite and ECMWF (European Centre for Medium-Range Weather Forecasts) data, the variations of the electron density and temperature, magnetic field, TEC (Total Electron Content), LST (Land Surface Temperature), AOD (Aerosol Optical Depth) and SKT (SKin Temperature) have been surveyed to find the potential seismic anomalies around the strong Ecuador (M

TL;DR: In this article, the authors present the current version 3 of the H el M od model and review how main processes involved in GCR propagation were implemented, including the particle drift effects, which affect the transport of particles entering the solar cavity as a function of their charge sign.

TL;DR: Zhang et al. as mentioned in this paper used a genetic algorithm (GA) to optimize the initial weights of neural networks to avoid the local minimum effect caused by the traditional NN-based model.

TL;DR: In this paper, a review of the results obtained from modeling and experimental efforts in the last 15 years is presented, focusing on the impact of the Sun's magnetic field on the Earth's magnetosphere.

TL;DR: In this article, analytical hierarchy process (AHP) has been applied to develop landslide susceptibility map of the Lish river basin of Eastern Darjiling Himalaya based on geospatial tools.

TL;DR: A methodology to predict RSOs’ trajectories with higher accuracy than that of the current methods by integrating physics-based orbit prediction algorithms with a learning-based process that focuses on reducing the prediction errors.

TL;DR: Time synchronization of new-generation Beidou Navigation Satellite System (BDS) satellites equipped with an ISL payload was conducted using L-band Two-way Satellite Time Frequency Transfer (TWSTFT), and system errors in the ISL measurements were calibrated by comparing the derived clock offsets with the TWSTFT.

TL;DR: The real-time kinematic PPP is carried out to investigate the effects of different Real-Time Service (RTS) products and their effects on real- time PPP.

TL;DR: Two RF based algorithms are introduced to incorporate visible, infrared (IR) and thermal spectral and textural features (FLFRF) including Gray Level Co-occurrence Matrix (GLCM) and Robust Extended Local Binary Pattern (RELBP_CI) or visible, IR and thermal classifiers (DL FRF) for highly accurate cloud detection on remote sensing images.

TL;DR: A recent development in solar atmospheric seismology consists in the use of inversion and model comparison methods based on Bayesian analysis as discussed by the authors, which makes use of observed and theoretically predicted properties of waves to infer plasma and magnetic field properties.

TL;DR: In this article, a coastal vulnerability index (CVI) was constructed to estimate the level of vulnerability of a coastline approximately 48.68 km in length using seven physical variables, namely, land subsidence, relative sea level change, coastal geomorphology, coastal slope, shoreline change, mean tidal range, and significant wave height.

TL;DR: In this paper, the authors presented the results of Swarm satellites (Alpha, Bravo and Charlie) data analysis around the Mexico earthquake epicenter during the period of 1 April to 15 October 2017.

TL;DR: It has proved that there exists a lower bound for the update interval, avoiding a phenomenon that the infinite number of events may appear in a finite time interval, also called the Zeno phenomenon.

TL;DR: In this paper, a Boolean matrix method was established to calculate the necessary observation durations from a Moon-based platform to enhance the observation duration, the time intervals during which the Earth surface features can be observed by sensors.

TL;DR: In this paper, two CryoSat-2 sea ice thickness products derived with independent algorithms are used to initialize a coupled ice-ocean modeling system in which a series of reanalysis studies are performed for the period of March 15, 2014-September 30, 2015.

TL;DR: In this paper, a tensor voting coupled Hough transform was employed to search the edges and extracted the geological lineaments in this region, and the experimental results showed that the orientation of lineaments was dominated by NW-SE and NE- SW, supplemented by NNW-SSE.

TL;DR: Wang et al. as mentioned in this paper used the color composites of principal components (PCs) of ASTER and Sentinel-2A data to differentiate rock units within the Shibanjing ophiolite complex.

TL;DR: In this article, a network of all-sky-imager (ASIs) with sites at opposite ends of the same geomagnetic field lines in each hemisphere is described.

TL;DR: This study presents a GPS receiver autonomous integrity monitoring (RAIM) method based on a chaos particle swarm optimization particle filter (CPSO-PF) algorithm with a log likelihood ratio that can effectively detect and isolate satellite faults under conditions of non-Gaussian measurement noise.

TL;DR: In this paper, it was shown that cosmic rays from exploding massive stars with winds always show two cosmic ray components at the same time: (i) the weaker polar cap component only produced by Diffusive Shock Acceleration, showing a relatively flat spectrum, and cut-off at the knee, and (ii) the stronger 4 π component, which is produced by a combination of Stochastic Shock Drift Acceleration and DiffusiveShock Acceleration.

TL;DR: In this article, the authors investigated the effects of intense geomagnetic storms of 2015 on the occurrences of large scale ionospheric irregularities over the African equatorial/low-latitude region.

TL;DR: In this paper, the authors proposed the Moon region as the central link to a transfer network that enables travel throughout the Earth-Moon system, connecting the lunar region to the vicinity of the Earth and the neighborhood of the triangular libration points.