Abstract
The purpose of aerospace sensors is to provide all the necessary information on the variables and parameters of the flight system for the execution of the mission at hand. A mission is generally defined in three dimensional space. Sometimes, on adding the fourth’dimension’, namely, time, a four-dimensional space is defined. In contrast to the three spatial coordinates which can increase or decrease, time always grows. The recent concept of 4-D guidance has special significance in coordinating flight paths such as in air traffic control or in space rendezvous operations, where the notions of ’here-now’ or ’there-then’ assume paramount importance.
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© 1996 Springer-Verlag New York, Inc.
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Merhav, S. (1996). Introduction and historical background. In: Aerospace Sensor Systems and Applications. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3996-3_1
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DOI: https://doi.org/10.1007/978-1-4612-3996-3_1
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4612-8465-9
Online ISBN: 978-1-4612-3996-3
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