Showing papers in "Advances in Space Research in 2017"

TL;DR: The status and tracking capabilities of the IGS monitoring station network are presented and the multi-GNSS products derived from this resource are discussed and the achieved performance is assessed and related to the current level of space segment and user equipment characterization.

TL;DR: In this paper, an end-to-end, comprehensive description of the data processing steps employed to estimate Northern Hemisphere sea ice thickness and subsequent volume using CryoSat-2 radar altimeter data and complementary observations is provided.

TL;DR: In this paper, the authors compare the results of these and other recent developments and how they compare with the bulk of new observations on the spectra of primary nuclei (mainly H and He) and secondary to primary ratios, such as the B/C ratio and the p ¯ / p ratio, and the positrons ratio e + / ( e - + e + ).

TL;DR: In this article, the authors compared the performance of ASTER, Landsat-8 and Sentinel 1 data sensors in automatic lineament extraction using a fully automatic approach consisting of a combination of edge detection algorithm and line-linking algorithm.

TL;DR: In this article, the fundamental flow physics of the interaction between an array of fuel jets and multi air jets in a supersonic transverse flow were investigated by using the Reynolds-averaged Navier-Stokes equations with Menter's Shear Stress Transport (SST) turbulence model.

TL;DR: X-TRACK as mentioned in this paper is a post-processing software for satellite altimetry data in coastal ocean areas, which is tailored for extending the use of satellite data to coastal ocean applications and provides freely available along-track sea level anomaly time series that cover today all the coastal oceans.

TL;DR: In this article, the authors quantified the nadir altimetry performance over a medium river (200m or lower wide) with a pluvio-nival regime in a temperate climate (the Garonne River, France).

TL;DR: The proposed control scheme not only guarantees that spacecraft attitude control errors converge toward a small invariant set containing the origin, but also ensures that there is no accumulation of triggering instants.

TL;DR: In this paper, the authors compare the performance of the CryoSat-2 FBR and LRM (pseudo-LRM) data in the coastal zone of the German Bight and West Baltic Sea during a time interval of almost six years, from July 2010 to March 2016.

TL;DR: A novel method to estimate the relative position, velocity, angular velocity, attitude and the ratios of the components of the inertia matrix of an uncooperative space object using only stereo-vision measurements is developed.

TL;DR: In this paper, the authors review the requirements and model dielectric properties of asteroids to outline a possible instrument suite, and highlight the capabilities of radar instrumentation to achieve these observations.

TL;DR: The stability analysis of the proposed control law indicates not only all states converge to the desired states at equilibrium but also disturbances caused by the uncertainty can be suppressed satisfactorily and demonstrated by computer simulations.

TL;DR: In this article, the interferometric mode of CryoSat-2 was used to map broad (5 km wide) swaths of surface elevation with fine (500 m) spatial resolution from each satellite pass, providing a step-change in the capability of satellite altimetry for glaciology.

TL;DR: The 5 cm orbit accuracy requirement in 3D is fulfilled according to the results of the orbit comparisons between the different orbit solutions from the QWG, and an error in the given geometry information about the satellite is found.

TL;DR: In this article, the authors evaluate the outputs from several atmospheric correction methods (Dark Object Subtraction (DOS), Quick Atmospheric Correction (QUAC), Fast Line-of-sight Atmospheric Analysis of Hypercubes (FLAASH), Atmospheric Correction for OLI ‘lite’ (ACOLITE), and Provisional Landsat-8 Surface Reflectance Algorithm (L8SR) in order to investigate the suitability of Rrs for estimating total suspended matter concentrations (TSM) in the Barra Bonita Hydroelectrical Reservoir.

TL;DR: The positioning accuracy as well as convergence speed benefit from the fusion of multi-GNSS and higher rate of precise clock corrections, and the positioning accuracy is improved by an average of 30–50% for the all the cases except for the BeiDou-only PPP.

TL;DR: In this paper, the authors established a correspondence between the uncertainties on ground-based detectors count rates and the parameter ϕ (modulation level in the force-field approximation) reconstructed from these count rates.

TL;DR: This article reviewed current projects developing extra-terrestrial construction, broadly categorised as: (i) ISRU-based construction materials; (ii) fabrication methods; and (iii) construction processes.

TL;DR: In this paper, the authors used a coherence and backscatter based threshold technique for forest area identification and accurate height estimation in non-forested regions, which showed significant potential for retrieval of forest biophysical parameters.

TL;DR: In this paper, a perspective is given of the solar modulation of galactic cosmic rays in the heliosphere during the extraordinary quiet solar minimum period from 2006 to 2009, and the results from comprehensive modeling are discussed.

TL;DR: The results indicate that the multi-constellation integration can significantly improve the availability and positioning accuracy and the enhancement of compatibility can also improve the available.

TL;DR: In this article, the spatiotemporal changes of vegetation growth in upper Shiyang river basin together with their responses to climate changes were investigated using SPOT VEGETATION Normalized Difference Vegetation Index (NDVI) and climate datasets from 1999 to 2013.

TL;DR: In this paper, the authors discuss the geopolymerization of lunar dust simulant JSC LUNAR-1A and Martian dust simulants JSC MARS-1a and test the maximum compressive and flexural strength of these simulants.

TL;DR: In this paper, the rotation properties of space debris are obtained as a function of object type and orbit using a phase-diagram reconstruction method, and the apparent rotation period is extracted from the light curve.

TL;DR: This study presents methodology and quality assessment of selected methods allowing for multi-GNSS observations combining in relative kinematic positioning using baselines up to tens of kilometers and characterizes loose and tight integration strategies applied to the ionosphere and troposphere weighted model.

TL;DR: A modular framework that combines orbital mechanics, attitude control and scheduling optimization to plan the time-varying, full-body orientation of agile Cubesats in a constellation such that they maximize the number of observed images and observation time, within the constraints of Cubesat hardware specifications is proposed.

TL;DR: Experimental results show that the proposed algorithm is effective which promotes significantly the bi-satellite cluster to improve the efficiency of targets recognition over sea as opposed to traditional methods where a large number of satellites are required to work coordinately.

TL;DR: The aim of the work presented here is to provide reliable technology that enables the controlled deployment and verification of its functionality with various laboratory tests, thereby qualifying the hardware for a first demonstration in low Earth orbit (LEO).

TL;DR: The Mini-EUSO instrument as mentioned in this paper is a UV telescope placed inside the International Space Station (ISS), looking down on the Earth from a nadir-facing window in the Russian Zvezda module.