Data Warehouse Design For Earth Observation Satellites
نویسندگان
چکیده
منابع مشابه
Scheduling a constellation of agile earth observation satellites with preemption
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 ...
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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...
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Introduction The development of Earth-observation techniques based on the use of navigation signals can be traced back to the use of GPS in geodetic applications to provide astonishing precision, such as the determination to within a few centimetres of the relative positions of points on the Earth’s surface separated by several thousand kilometres. This ultra-precise positioning of fixed GPS re...
متن کاملA Feasibility Study of Micro-Satellites for Earth Observation
There is a continuing desire to minimize the fabrication, launch, and operational costs of Earth-observing satellites, while still maintaining their high-resolution capabilities. Micro-satellites have been suggested as a method for obtaining these results using several different configurations; such as conventional filled aperture optics, distributed aperture systems, constellations and tethers...
متن کاملTowards dynamic real-time scheduling for multiple earth observation satellites
Currently, most tasks submitted to earth observation satellites (EOSs) are with deadlines, to satisfy users’ timing requirements. Besides, tasks are normally submitted dynamically, with uncertainties of tasks number and submission times. In this paper, we establish a multi-objective mathematic programming model for dynamic real-time scheduling of EOSs. To improve user’s revenue and resource uti...
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ژورنال
عنوان ژورنال: Procedia Engineering
سال: 2012
ISSN: 1877-7058
DOI: 10.1016/j.proeng.2012.01.587