ECS, eighth year in orbit

Cover of: ECS, eighth year in orbit |

Published by European Space Agency in Paris .

Written in English

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  • ECS System.,
  • Artificial satellites -- Reliability.

Edition Notes

Book details

Statement[written by D.W. Baston ... et al.].
SeriesESA BR,, 82
ContributionsBaston, D. W., European Space Agency.
LC ClassificationsTK5104.2.E29 E28 1992
The Physical Object
Paginationiv, 30 p. :
Number of Pages30
ID Numbers
Open LibraryOL1135173M
ISBN 109290921072
LC Control Number94102006

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The experience gained with the European Communication System (ECS) satellites during the eight years of service in orbit is summarized. The performance of individual satellite systems is evaluated. They include reports on: thermal control, communications payload, number of operating hours, telemetry, tracking, command, solar arrays, batteries, attitude control, orbit control, and reaction Author: D.

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This legendary paramedic textbook was first developed by Dr. Nancy Caroline in the early s and transformed paramedic education/5(). The book follows two main narrative threads: one which follows the exploits of Ian Cormac, a -like agent from ECS (Earth Central Security), and another thread which follows the story of Arian Pelter and his band of Separatists from Cheyne : Neal Asher.

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The initial velocity for orbit 2 (or the semimajor axis of the orbit) is deliberately chosen so that the period of revolution for this orbit is twice the period for circular orbit 1. Similarly, for orbit 3 the initial conditions ensure that the period is two times the period for orbit 2 and four times the period for circular orbit 1.

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As a youngish engineer in the s I’d already had plenty of experience in exploiting the properties of communications signals to solve complex problems.

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Figure D1 shows the trajectory of the Earth E (black ellipse with the Sun S at one focus) and of the fictitious Earth E' having a circular orbit centred on S, with the same orbital period as E. From Kepler's third law T 2 /a 3 = 4π 2 /(GM Sun), the radius r of the circular orbit is thus equal to the semi-major axis a of the elliptical orbit of E.

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