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17 December 1996 Central electronics subassembly of ENVISAT-1 ASAR: functions, performance and architecture
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The Central Electronics Sub-Assembly (CESA) forms part of the advanced synthetic aperture radar (ASAR) to be included in the payload for ESA's ENVISAT-1 mission. The purpose of ASAR is to obtain measurements of the radar backscatter from the Earth's surface, allowing its imaging day and night and under all weather conditions. ASAR is composed by two separate subassemblies: an antenna-subassembly (ASA), which is a large deployable planar phase array containing distributed transmit/receive modules; the CESA, which provides all centralized control facilities enabling the ground control to select the desired instrument operation mode with the desired parameters set and keeping the ground control informed about ASAR detailed health status. From an RF signal point of view, CESA generates the transmit radar waveform with the selected characteristics providing it as C-band drive pulse to the ASA; CESA also downconverts the ASA received echo signal, digitizes, pre-processes and formats it prior to transmission to the platform DMS. Purpose of this paper is to provide an overview of the main CESA functions nd an outline of the main performances aspects. Architectural choices and constraints are also discussed.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Giuseppe Angino, R. Bertoni, G. Braconi, G. Cascioli, G. Fowler, M. Hutchinson, G. Impagnatiello, and P. Tong "Central electronics subassembly of ENVISAT-1 ASAR: functions, performance and architecture", Proc. SPIE 2958, Microwave Sensing and Synthetic Aperture Radar, (17 December 1996);

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