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100   $a20051104d2005      uy         0
101 0 $aeng
135   $aurcn|||||||||
181   $ctxt
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183   $acr
200 04$aThe atacama large millimeter array (ALMA) $eimplications of a potential descope /$fCommittee to Review the Science Requirements for the Atacama Large Millimeter Array
205   $a1st ed.
210   $aWashington, D.C. $cNational Academies Press$dc2005
215   $a1 online resource (48 p.)
300   $aDescription based upon print version of record.
311 08$a9780309096942 
311 08$a0309096944 
327   $a""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""
330   $aThe 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.
606   $aRadar
606   $aDetectors
615  0$aRadar.
615  0$aDetectors.
676   $a522.682
712 02$aNational Research Council (U.S.).$bCommittee to Review the Science Requirements for the Atacama Large Millimeter Array.
712 02$aNational Research Council (U.S.).$bCommittee on Astronomy and Astrophysics.
801  0$bMiAaPQ
801  1$bMiAaPQ
801  2$bMiAaPQ
906   $aBOOK
912   $a9910956063803321
996   $aThe atacama large millimeter array (ALMA)$94365955
997   $aUNINA