67 research outputs found
Maunakea Spectroscopic Explorer (MSE) - The Prime Focus Subsystems: Requirements and Interfaces
MSE will be a massively multiplexed survey telescope, including a segmented
primary mirror which feeds fibers at the prime focus, including an array of
approximately four thousand fibers, positioned precisely to feed banks of
spectrographs several tens of meters away. We describe the process of mapping
top-level requirements on MSE to technical specifications for subsystems
located at the MSE prime focus. This includes the overall top-level
requirements based on knowledge of similar systems at other telescopes and how
those requirements were converted into specifications so that the subsystems
could begin working on their Conceptual Design Phases. We then discuss the
verification of the engineering specifications and the compiling of lower-level
requirements and specifications into higher level performance budgets (e.g.
Image Quality). We also briefly discuss the interface specifications, their
effect on the performance of the system and the plan to manage them going
forward. We also discuss the opto-mechanical design of the telescope top end
assembly and refer readers to more details for instrumentation located at the
top end.Comment: 14 pages; Proceedings of SPIE Astronomical Telescopes +
Instrumentation 2018; Modeling, Systems Engineering, and Project Management
for Astronomy VII
Maunakea Spectroscopic Explorer Advancing from Conceptual Design
The Maunakea Spectroscopic Explorer (MSE) project has completed its
Conceptual Design Phase. This paper is a status report of the MSE project
regarding its technical and programmatic progress. The technical status
includes its conceptual design and system performance, and highlights findings
and recommendations from the System and various subsystems design reviews. The
programmatic status includes the project organization and management plan for
the Preliminary Design Phase. In addition, this paper provides the latest
information related to the permitting process for Maunakea construction.Comment: 15 pages; Proceedings of SPIE Astronomical Telescopes +
Instrumentation 2018; Ground-based and Airborne Telescopes VI
The science calibration challenges of next generation highly multiplexed optical spectroscopy: the case of the Maunakea Spectroscopic Explorer
MSE is an 11.25m telescope with a 1.5 sq.deg. field of view. It can
simultaneously obtain 3249 spectra at R=3000 from 360-1800nm, and 1083 spectra
at R=40000 in the optical. The large field of view, large number of targets, as
well as the use of more than 4000 optical fibres to transport the light from
the focal plane to the spectrographs, means that precise and accurate science
calibration is difficult but essential to obtaining the science goals. As a
large aperture telescope focusing on the faint Universe, precision sky
subtraction and spectrophotometry are especially important. Here, we discuss
the science calibration requirements, and the adopted calibration strategy,
including operational features and hardware, that will enable the successful
scientific exploitation of the vast MSE dataset.Comment: Proceedings of SPIE Astronomical Telescopes + Instrumentation 2018;
Observatory Operations: Strategies, Processes, and Systems VI
Maunakea Spectroscopic Explorer (MSE): Implementing systems engineering methodology for the development of a new facility
Maunakea Spectroscopic Explorer will be a 10-m class highly multiplexed
survey telescope, including a segmented primary mirror and robotic fiber
positioners at the prime focus. MSE will replace the Canada France Hawaii
Telescope (CFHT) on the summit of Mauna Kea, Hawaii. The multiplexing includes
an array of over four thousand fibres feeding banks of spectrographs several
tens of meters away. We present an overview of the requirements flow-down for
MSE, from Science Requirements Document to Observatory Requirements Document.
We have developed the system performance budgets, along with updating the
budget architecture of our evolving project. We have also identified the links
between subsystems and system budgets (and subsequently science requirements)
and included system budget that are unique to MSE as a fiber-fed facility. All
of this has led to a set of Observatory Requirements that is fully consistent
with the Science Requirements.Comment: 20 pages; Proceedings of SPIE Astronomical Telescopes +
Instrumentation 2018; Modeling, Systems Engineering, and Project Management
for Astronomy VII
NFIRAOS First Facility AO System for the Thirty Meter Telescope
NFIRAOS, the Thirty Meter Telescope's first adaptive optics system is an
order 60x60 Multi-Conjugate AO system with two deformable mirrors. Although
most observing will use 6 laser guide stars, it also has an NGS-only mode.
Uniquely, NFIRAOS is cooled to -30 C to reduce thermal background. NFIRAOS
delivers a 2-arcminute beam to three client instruments, and relies on up to
three IR WFSs in each instrument. We present recent work including: robust
automated acquisition on these IR WFSs; trade-off studies for a common-size of
deformable mirror; real-time computing architectures; simplified designs for
high-order NGS-mode wavefront sensing; modest upgrade concepts for
high-contrast imaging.Comment: ..submitted to SPIE 9148 Astronomical Telescopes and Instrumentation
- Adaptive Optics Systems IV (2014
TMT telescope structure system: design and development progress report
The Thirty Meter Telescope (TMT) project has revised the reference optical configuration from an Aplanatic Gregorian to a Ritchey-Chrétien design. This paper describes the revised telescope structural design and outlines the design methodology for achieving the dynamic performance requirements derived from the image jitter error budget. The usage of transfer function tools which incorporate the telescope structure system dynamic characteristics and the control system properties is described along with the optimization process for the integrated system. Progress on the structural design for seismic considerations is presented. Moreover, mechanical design progress on the mount control system hardware such as the hydrostatic bearings and drive motors, cable wraps and safety system hardware such as brakes and absorbers are also presented
TMT telescope structure system: design and development progress report
The Thirty Meter Telescope (TMT) project has revised the reference optical configuration from an Aplanatic Gregorian to a Ritchey-Chrétien design. This paper describes the revised telescope structural design and outlines the design methodology for achieving the dynamic performance requirements derived from the image jitter error budget. The usage of transfer function tools which incorporate the telescope structure system dynamic characteristics and the control system properties is described along with the optimization process for the integrated system. Progress on the structural design for seismic considerations is presented. Moreover, mechanical design progress on the mount control system hardware such as the hydrostatic bearings and drive motors, cable wraps and safety system hardware such as brakes and absorbers are also presented
- …