03359nam 2200661Ia 450 991095606380332120251116165702.09786610262786978030918205803091820509781280262784128026278897803095517550309551757(CKB)1000000000245214(EBL)3378010(SSID)ssj0000277086(PQKBManifestationID)11221985(PQKBTitleCode)TC0000277086(PQKBWorkID)10232859(PQKB)10921966(MiAaPQ)EBC3378010(Au-PeEL)EBL3378010(CaPaEBR)ebr10091312(CaONFJC)MIL26278(OCoLC)61672311(Perlego)4737869(BIP)12806889(EXLCZ)99100000000024521420051104d2005 uy 0engurcn|||||||||txtccrThe atacama large millimeter array (ALMA) implications of a potential descope /Committee to Review the Science Requirements for the Atacama Large Millimeter Array1st ed.Washington, D.C. National Academies Pressc20051 online resource (48 p.)Description based upon print version of record.9780309096942 0309096944 ""Front Matter""; ""Preface""; ""Acknowledgment of Reviewers""; ""Contents""; ""Summary""; ""1 Introduction""; ""2 Technical Performance Specifications""; ""3 Performance Degradation""; ""4 The Threshold for Transformational Science""; ""5 Minimum Number of Antennas""; ""Appendixes""; ""Appendix A Letter of Request""; ""Appendix B ALMA Level-1 Science Requirements""The 1991 NRC decadal survey for astronomy and astrophysics included a project called the Millimeter Array (MMA). This instrument would be an array of millimeter-wavelength telescopes intended to capture images of star-forming regions and distant star-burst galaxies. With the addition of contributions form Europe, the MMA evolved into the Atacama Large Millimeter Array (ALMA), a proposed array of 64, 12-meter antennas. The project is now part of the NSF Major Research Equipment and Facilities budget request. Increased costs, however, have forced the NSF to reconsider the number of antennas. To help with that review, NSF asked the NRC to assess the scientific consequences of reducing the number of active antennas from 60 to either 50 or 40. This report presents an assessment of the effect of downsizing on technical performance specifications, performance degradation, and the ability to perform transformational science, and of the minimum number of antennas needed.RadarDetectorsRadar.Detectors.522.682National Research Council (U.S.).Committee to Review the Science Requirements for the Atacama Large Millimeter Array.National Research Council (U.S.).Committee on Astronomy and Astrophysics.MiAaPQMiAaPQMiAaPQBOOK9910956063803321The atacama large millimeter array (ALMA)4365955UNINA