A Novel Systems Engineering Approach to the Design of a Precision Radial Velocity Spectrograph - the GMT-Consortium Large Earth Finder (G-CLEF)

被引：20

作者：

Podgorski, William nil ^{[1
]}

Bean, Jacob ^{[4
]}

Bergner, Henry ^{[1
]}

Chun, Moo-Young ^{[5
]}

Crane, Jeffrey ^{[2
]}

Evans, Ian ^{[1
]}

Evans, Janet ^{[1
]}

Furesz, Gabor ^{[1
]}

Guzman, Dani ^{[3
]}

Kim, Kang-Min ^{[5
]}

McCracken, Kenneth ^{[1
]}

Mueller, Mark ^{[1
]}

Norton, Timothy ^{[1
]}

Park, Chan ^{[5
]}

Park, Sang ^{[1
]}

Plummer, David ^{[1
]}

Szentgyorgyi, Andrew ^{[1
]}

Uomoto, Alan ^{[2
]}

Yuk, In-Soo ^{[5
]}

机构：

[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02140 USA

[2] Observ Carnegie Inst Sci, Pasadena, CA 91101 USA

[3] Pontificia Univ Catolica Chile, Santiago, Chile

[4] Univ Chicago, Chicago, IL 60637 USA

[5] Korea Astron & Space Sci Inst KASI, Daejeon, South Korea

来源：

GROUND-BASED AND AIRBORNE INSTRUMENTATION FOR ASTRONOMY V | 2014年 / 9147卷

关键词：

echelle spectrograph; exoplanet; precision radial velocity; G-CLEF; GMT; error budget; systems engineering;

D O I：

10.1117/12.2056329

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

One of the first light instruments for the Giant Magellan Telescope(1) (GMT) will be the GMT-Consortium Large Earth Finder (G-CLEF). It is an optical band echelle spectrograph that is fiber fed to enable high stability. One of the key capabilities of G-CLEF will be its extremely precise radial velocity (PRV) measurement capability. The RV precision goal is 10 cm/sec, which is expected to be achieved with advanced calibration methods and the use of the GMT adaptive optics system. G-CLEF, as part of the GMT suite of instruments, is being designed within GMT's automated requirements management system. This includes requirements flow down, traceability, error budgeting, and systems compliance. Error budgeting is being employed extensively to help manage G-CLEF technical requirements and ensure that the top level requirements are met efficiently. In this paper we discuss the G-CLEF error budgeting process, concentrating on the PRV precision and instrument throughput budgets. The PRV error budgeting process is covered in detail, as we are taking a detailed systems error budgeting approach to the PRV requirement. This has proven particularly challenging, as the precise measurement of radial velocity is a complex process, with error sources that are difficult to model and a complex calibration process that is integral to the RV measurement. The PRV budget combines traditional modeling and analysis techniques, where applicable, with semi-empirical techniques, as necessary. Extrapolation from existing PRV instruments is also used in the budgeting process.

引用

页数：17

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