NDLI: Architecture of GAIA satellite phased array antenna

Content Provider	IEEE Xplore Digital Library
Author	Allica, J.C. Alonso, E. Amado, M. Bazán, A. Casares, F. de Witte, E. Garcia, Q. McConnell, T. Montesano, A. Santilario, J. Serrano, J.L.
Copyright Year	2010
Description	Author affiliation: EADS CASA Espacio, Avenida de Aragón 404, 28022 Madrid (Allica, J.C.; Alonso, E.; Amado, M.; Bazán, A.; Casares, F.; de Witte, E.; Garcia, Q.; McConnell, T.; Montesano, A.; Santilario, J.; Serrano, J.L.)
Abstract	GAIA is a new scientific ESA programme aimed to build a 3D map of the stars in the galaxy to unprecedented accuracy. In order to meet such requirement the GAIA satellite will be located in a Lissajous-type orbit, around the L2 point of the Sun-Earth system, which is located 1.5 million km from the Earth in the anti-Sun direction. This orbit is not impacted by Earth eclipses and shadowing from the Sun, Earth or Moon. In order to complete the required map, the spacecraft rotates on its axis at a low angular rate of about 1º/min, which permits to the scientific instrument to perform the required mapping measurements. To make the despun operation required to maintain the spacecraft-earth link, the antenna has a cone-trunk geometry which is populated by patch antenna subarrays which are electronically scanned by means of MMIC phase shifters which are commanded by a control unit which performs the required angle pointing operations.
Starting Page	1
Ending Page	4
File Size	522115
Page Count	4
File Format	PDF
ISBN	9781424464319
e-ISBN	9788476534724
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-04-12
Publisher Place	Spain
Access Restriction	Subscribed
Rights Holder	EurAAP
Subject Keyword	Phased arrays Earth Space vehicles Performance evaluation Satellite antennas Instruments Moon Sun Antenna arrays Shadow mapping
Content Type	Text
Resource Type	Article

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