A British satellite has gone into orbit on an Indian rocket to acquire full-colour, high-definition video of the surface of the Earth. The small, low-cost UK mission was one of 31 payloads riding on the Indian Polar Satellite Launch Vehicle. It lifted off from the Satish Dhawan spaceport in Andhra Pradesh. The spacecraft is a pre-production model. If it performs well over the coming months, its manufacturer, SSTL, also in Guildford, will proceed with Earth-i's first batch of five operational spacecraft. The contract for these platforms was signed in November.
The forthcoming constellation (which will be known as Vivid-i ), will be the first of it’s kind to provide high-definition, full-colour video. Short movies of the Earth's surface have been acquired from orbit before. The demonstrator will circle the globe at an altitude of 505 km.
Image analysts could use such views to monitor and model traffic flow around cities, and in and out of ports. But the system can also be configured to generate slightly offset images of a target which can then be assembled into 3D models of surface elevation. This approach could be used to make urgent maps for relief teams entering an earthquake disaster zone, for example.
At the moment, Earth-i's plan is to put up additional batches of five spacecraft every year or so after the initial quintet have been launched at the end of 2019. With a 15-satellite constellation, Earth-i could image a particular place at least three times a day.
What all these proposed constellations have in common is that they are exploiting the use of cheap electronics normally found in consumer products - rather than the expensive, "space qualified" parts built into traditional spacecraft designs. This makes the manufacture and launch of multiple platforms much more affordable.
The forthcoming constellation (which will be known as Vivid-i ), will be the first of it’s kind to provide high-definition, full-colour video. Short movies of the Earth's surface have been acquired from orbit before. The demonstrator will circle the globe at an altitude of 505 km.
Image analysts could use such views to monitor and model traffic flow around cities, and in and out of ports. But the system can also be configured to generate slightly offset images of a target which can then be assembled into 3D models of surface elevation. This approach could be used to make urgent maps for relief teams entering an earthquake disaster zone, for example.
At the moment, Earth-i's plan is to put up additional batches of five spacecraft every year or so after the initial quintet have been launched at the end of 2019. With a 15-satellite constellation, Earth-i could image a particular place at least three times a day.
What all these proposed constellations have in common is that they are exploiting the use of cheap electronics normally found in consumer products - rather than the expensive, "space qualified" parts built into traditional spacecraft designs. This makes the manufacture and launch of multiple platforms much more affordable.
Une fusée Indienne envoie un satellite anglais dans l’espace
Le satellite baptisé Vivid-i, sera le premier du genre à offrir une vidéo haute définition en couleur. Des films courts de la surface de la Terre ont été pris sur orbite. Le vaisseau test fera le tour du globe à une altitude de 505 km.
Les analystes d'images peuvent utiliser ces vues pour surveiller et modéliser le flux de trafic autour des villes, ainsi que dans et hors des ports. Mais le système peut également être configuré pour générer des images légèrement décalées d'une cible qui peuvent ensuite être assemblées en modèles 3D par élévation de surface. Cette approche pourrait être utilisée pour faire des cartes d’urgence pour les équipes de secours entrant dans une zone sinistrée, par exemple.
Si le projet fonctionne Earth-i envisagerait le lancement d’autres satellites en orbite au rythme de 5 par an. Avec 15 satellites en orbite Earth-i pourrait documenter au moins 3 endroits par jour.
Ce qui rend ce projet beaucoup plus attractif et abordable, c’est la fabrication et la conception des pièces. Faites avec de l’électronique bon marché, comme les pièces utilisées généralement pour le téléphone au lieu d’utiliser les pièces traditionnelles plus coûteuses certifiées pour l’espace. Cela rend donc le lancement et la fabrication de plusieurs plates-formes plus abordables.
Auréa
Sources : http://www.bbc.com/news/science-environment-42654281
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