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132 results for “Satellite”
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Research ArticleOpen accessEvery word in the titleDetermination of Nonlinear Optimal Feedback Law for Satellite Injection Problem Using Neighboring Optimal ControlHamed Hossein Afshari, Alireza Basohbat Novinzadeh, Jafar RoshanianAn optimal trajectory design of a nonlinear satellite injection problem for transfer to a final target orbit by minimizing the time was investigated. Indeed, this design was an exact solution to the nonlinear two-point boundary value problem which determined optimal control history as well as optimal state trajectories in the open-loop form. Furthermore, the obtained optimal guidance strategy was exerted … …American Journal of Applied Sciences, Vol. 6, Issue 3 · 31 Mar 2009 · 7,256 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleActive Fire Monitoring with Level 1.5 MSG Satellite ImagesAbdelatif Hassini, Farid Benabdelouahed, Noureddine Benabadji, Ahmed Hafid BelbachirThe first of the new generation of Meteosat satellites, known as Meteosat Second Generation (MSG-1), was launched in August 2002. As with the current Meteosat series, MSG is spin-stabilized and capable of greatly enhanced Earth observations. The satellite’s 12-channel imager, known formally as the Spinning Enhanced Visible and Infrared Imager (SEVIRI), observes the full disk of the Earth with an … …American Journal of Applied Sciences, Vol. 6, Issue 1 · 31 Jan 2009 · 8,130 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleResonance Caused by the Gravitational waves On an Earth SatelliteMohamad RadwanThe present work deals with the motion of an Earth satellite taking into account the oblateness of the Earth and of a passing Gravitational wave. The oblateness of the Earth is truncated beyond the second zonal harmonic, J2, which plays the role of the small parameter of the problem. The conditions for resonance are determined and the resonance resulting from … …American Journal of Applied Sciences, Vol. 5, Issue 10 · 31 Oct 2008 · 6,769 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleMulti-Satellite Custody of Moving Ground TargetsDavid SchusterMaintaining persistent custody of ground targets from Low Earth Orbit (LEO) is a key challenge in space-based surveillance and reconnaissance. Traditional rule-based tasking strategies struggle with scalability as the number of assets and targets grows. In this paper, we present a centralized Reinforcement Learning (RL) approach using Proximal Policy Optimization (PPO) to coordinate four LEO satellites tasked with tracking two … …Journal of Computer Science, Vol. 22, Issue 3 · 25 Mar 2026 · 1,575 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleA Novel Approach of Satellite Image Enhancement Using DWT Based on 2-Type Fuzzy LogicSurjeet Singh Patel, Vivek Kumar Tamta, Abhilekh Bartwal et al.This study proposes a new approach to enhance the dark and low-contrast satellite images captured under poor illumination. Images are converted from RGB to HSV color space in order to separate the Hue (H), Saturation (S), and luminance (V) components. Enhancement is achieved in saturation and luminance components using Discrete Wavelet Transform (DWT) and 2-type fuzzy logic. DWT breaks the … …Journal of Computer Science, Vol. 19, Issue 9 · 15 Aug 2023 · 5,182 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleSensing the Hydrogeomorphology and Palaeohydrologic Features of Mars Planet with Inference from the Egyptian Desert: An Insight from Satellite ImagesMohamed YousifThe water access in any planet of the universe can be considered a crucial evidence for life existence. The study of Mars has special importance where it has a complex preserved geological record of a time period longer than on Earth. Many regions of Mars planet are subjected to observations through the obtained satellite images in comparison to similar areas … …Space Science International, Vol. 4, Issue 1 · 27 Apr 2020 · 13,200 accessesView PDFCite
Review ArticleOpen accessEvery word in the titleMission Shakti aka Project XSV-1: India’s First Anti-Satellite Test (ASAT)Santosh KosambeThe Mission Shakti, also called as Project XSV-1 was India’s first Anti-Satellite Test (ASAT) conducted successfully on 27 March 2019. The PDV-MK II interceptor missile designed and developed by Defence Research and Development Organisation (DRDO) was launched from Dr A.P.J. Abdul Kalam Island to intercept the Microsat-R satellite. The Microsat-R satellite, which acts as a prime target for the mission … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 25 Jul 2019 · 13,826 accessesView PDFCite
Review ArticleOpen accessEvery word in the titleThe TESS Satellite will Search for Planets in the Vicinity of our Solar SystemRelly Victoria Virgil PetrescuThe US Space Agency has launched from Cape Canaveral, Florida, the TESS satellite, which will search for planets near our solar system and study them in detail. "TESS will significantly increase the number of planets studied," said George Ricker of the Massachusetts Institute of Technology, MIT, before launching. "It will double the number of planets we've seen and detected with … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 23 May 2019 · 6,639 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleThe Use of Remote Sensing Techniques in Detecting and Predicting Forest Vegetation Change Using MODIS Satellite Data, Golestan, IranAkram Karimi, Sara Abdollahi, Hamid Reza Kabiri Balajadeh et al.It is so important to be aware of quantitative and qualitative characteristics of changes for the environment, land use planning and sustainable development. Detecting the changes in the condition of an issue is done by time difference observations. Change detection refers to the process of detecting time changes of an object through different time observations. The detection of changes by … …American Journal of Engineering and Applied Sciences, Vol. 11, Issue 1 · 30 Mar 2018 · 8,287 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleInteractions of Aerosol Optical Depth and Cloud Parameters with Rainfall and the Validation of Satellite Based Rainfall ObservationsMd Monirul Islam, Md Mainul Islam Mamun, Md Zahidul Islam, Mumnunul KeramatAerosol-cloud interactions influence the global precipitation patterns that influence significantly the Earth's climate system. Anthropogenic aerosols alter the clouds and their optical properties. The present study has investigated the Aerosol Optical Depth (AOD), cloud parameters and rainfall interactions for three different monsoon periods (2008-2010) and also compared the satellite rainfall with ground based observations, by using MODIS and TRMM datasets. … …American Journal of Environmental Sciences, Vol. 13, Issue 4 · 24 Jun 2017 · 7,751 accessesView PDFCite