Consoli, AngeloAngeloConsoliLehmann, ChristophChristophLehmannIera, ChristianChristianIeraPetit, LaurentLaurentPetitAyadi, JaouharJaouharAyadiChiurtu, NicolaeNicolaeChiurtuPiazza, FrancescoFrancescoPiazzaMaterni, RobertoRobertoMaterniArcuri, EdgardoEdgardoArcuriNALDI, GiovanniGiovanniNALDIGodefroy, BaptisteBaptisteGodefroyProst, Jean-BaptisteJean-BaptisteProstAndrikopoulos, IliasIliasAndrikopoulosDrandakis, DimitrisDimitrisDrandakisAnagnostopoulos, ChristosChristosAnagnostopoulos2024-01-232024-01-232009http://hdl.handle.net/20.500.12386/34599This deliverable is basically a high level specification of the GRABEL receiver and should serve as the guideline during its development. The two proposed applications are specified, and the requirements that need to be fulfilled by the GRABEL receiver to be successful in these 2 applications are listed. The structure and characteristics of the receiver are then described, where possible already in a quantitative manner. Particular attention was reserved to the antenna array. Given the relatively large dimensions that a beamforming array must have (>8cm per side for a minimum 2x2 array, determined by simple physics) it is important not to over- or under-specify it, otherwise usability of GRABEL could be impacted too heavily. The specifications given here will then be refined during the GRABEL development and should be reflected in its manual or data sheet.ELETTRONICOenResearch reportFIS/05 - ASTRONOMIA E ASTROFISICAERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation