نتایج جستجو برای: agile earth observation satellite

تعداد نتایج: 358053  

2013
Johannes Aldinger Johannes Löhr

Agile Earth observation satellites are satellites orbiting Earth with the purpose to gather information of the Earth’s surface by slewing the satellite toward regions of interest. Constraints arise not only from dynamical and kinematic aspects of the satellite and its sensors. Regions of interest change over time and bad weather can conceal important observation targets. This results in a const...

In this paper, we consider a scheduling problem for a set of agile Earth observation satellites for scanning  different parts of the Earth’s surface. We assume that preemption is allowed to prevent repetitive images and develop four different preemption policies. Scheduling is done for the imaging time window and transmission time domain to the Earth stations as well. The value of each picture ...

2013
Johannes Löhr Johannes Aldinger Georg Willich

Agile Earth observation missions continuously require a large amount of planning during the spacecraft’s observations. Beside priorities of the observation sites, especially the agility constraints of the satellite are important to be taken into account during the planning process. This is due to the body-fixed instrument’s line of sight, requiring the whole satellite to point to the observatio...

Journal: :Remote Sensing 2023

The increasing number of agile earth observation satellites (AEOSs) in orbit have advanced maneuverable capabilities, enabling the AEOS constellation to provide richer services. Therefore, scheduling is crucial for improving performance satellite remote sensing systems. This paper focuses on problem distributed constellation, where a period transition time required between two consecutive obser...

Journal: :IEEE Systems Journal 2021

Agile satellites with advanced attitude maneuvering capability are the new generation of earth observation (EOSs). The continuous improvement in satellite technology and decrease launch cost have boosted development agile EOSs (AEOSs). To efficiently employ increasing orbiting AEOSs, AEOS scheduling problem (AEOSSP) aiming to maximize entire profit while satisfying all complex operational const...

Journal: :IEEE transactions on systems, man, and cybernetics 2022

The scheduling of agile Earth observation satellites is to select a subset candidate targets each associated with profit during their visible time windows in order maximize the collected profits, under some operational constraints. For pair two consecutive observations, transition required perform rotating movement camera, depending on start times observations. This time-dependency significantl...

2015
Adrien Maillard

Earth observation from space allows us to better understand natural phenomenas such as marine currents, to prevent or follow natural disasters, to follow climate evolution and many other things. To achieve that, there are a great number of artificial satellites orbiting Earth, equipped with highresolution optical instruments and communicating with a network of ground stations. A satellite is sa...

2007
Grégory Beaumet Gérard Verfaillie Marie-Claire Charmeau

Most of the currently active Earth-observing satellites are entirely controlled from the ground: observation plans are regularly computed on the ground, uploaded to the satellite using visibility windows and then, executed on-board as they stand. Because the possible presence of clouds is the main obstacle to optical observation, meteorological forecasts are taken into account when building the...

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