The Infrared Imaging Spectrograph (IRIS) for TMT: final software design update

TL;DR

This paper describes the final software design for IRIS, the first-light instrument for TMT, focusing on its architecture, interfaces, and integration with various systems using TMT Common Software.

Contribution

It presents the comprehensive software architecture and component interactions for IRIS, integrating multiple systems and new software frameworks for the TMT project.

Findings

Software architecture overview and design principles

Integration with TMT systems and interfaces

Use of TMT Common Software framework

Abstract

The InfraRed Imaging Spectrograph (IRIS) is the first-light client instrument for the Narrow Field Infrared Adaptive Optics System (NFIRAOS) on the Thirty Meter Telescope (TMT). Now approaching the end of its final design phase, we provide an overview of the instrument control software. The design is challenging since IRIS has interfaces with many systems at different stages of development (e.g., NFIRAOS, telescope control system, observatory sequencers), and will be built using the newly-developed TMT Common Software (CSW), which provides framework code (Java/Scala), and services (e.g., commands, telemetry). Lower-level software will be written in a combination of Java and C/C++ to communicate with hardware, such as motion controllers and infrared detectors. The overall architecture and philosophy of the IRIS software is presented, as well as a summary of the individual software components and their interactions with other systems.