Share Email Print
cover

Proceedings Paper

Thirty Meter Telescope (TMT) Narrow Field Infrared Adaptive Optics System (NFIRAOS) real-time controller preliminary architecture
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The Narrow Field Infrared Adaptive Optics System (NFIRAOS) is the first light Adaptive Optics (AO) system for the Thirty Meter Telescope (TMT). A critical component of NFIRAOS is the Real-Time Controller (RTC) subsystem which provides real-time wavefront correction by processing wavefront information to compute Deformable Mirror (DM) and Tip/Tilt Stage (TTS) commands. The National Research Council of Canada - Herzberg (NRC-H), in conjunction with TMT, has developed a preliminary design for the NFIRAOS RTC. The preliminary architecture for the RTC is comprised of several Linux-based servers. These servers are assigned various roles including: the High-Order Processing (HOP) servers, the Wavefront Corrector Controller (WCC) server, the Telemetry Engineering Display (TED) server, the Persistent Telemetry Storage (PTS) server, and additional testing and spare servers. There are up to six HOP servers that accept high-order wavefront pixels, and perform parallelized pixel processing and wavefront reconstruction to produce wavefront corrector error vectors. The WCC server performs low-order mode processing, and synchronizes and aggregates the high-order wavefront corrector error vectors from the HOP servers to generate wavefront corrector commands. The Telemetry Engineering Display (TED) server is the RTC interface to TMT and other subsystems. The TED server receives all external commands and dispatches them to the rest of the RTC servers and is responsible for aggregating several offloading and telemetry values that are reported to other subsystems within NFIRAOS and TMT. The TED server also provides the engineering GUIs and real-time displays. The Persistent Telemetry Storage (PTS) server contains fault tolerant data storage that receives and stores telemetry data, including data for Point-Spread Function Reconstruction (PSFR).

Paper Details

Date Published: 8 August 2016
PDF: 19 pages
Proc. SPIE 9913, Software and Cyberinfrastructure for Astronomy IV, 99134J (8 August 2016); doi: 10.1117/12.2233709
Show Author Affiliations
Dan Kerley, National Research Council of Canada (Canada)
Malcolm Smith, Natioanl Research Council of Canada (Canada)
Jennifer Dunn, National Research Council of Canada (Canada)
Glen Herriot, National Research Council of Canada (Canada)
Jean-Pierre Véran, National Research Council of Canada (Canada)
Corinne Boyer, Thirty Meter Telescope (United States)
Brent Ellerbroek, Thirty Meter Telescope (United States)
Luc Gilles, Thirty Meter Telescope (United States)
Lianqi Wang, Thirty Meter Telescope (United States)


Published in SPIE Proceedings Vol. 9913:
Software and Cyberinfrastructure for Astronomy IV
Gianluca Chiozzi; Juan C. Guzman, Editor(s)

© SPIE. Terms of Use
Back to Top