TELICS-A Telescope Instrument Control System for Small/Medium Sized Astronomical Observatories

Abstract

For any modem astronomical observatory, it is essential to have an efficient interface between the telescope and its back-end instruments. However, for small and medium-sized observatories, this requirement is often limited by tight financial constraints. Therefore a simple yet versatile and low-cost control system is required for such observatories to minimize cost and effort. Here we report the development of a modem, multipurpose instrument control system TELlCS (Telescope Instrument Control System) to integrate the controls of various instruments and devices mounted on the telescope. TELlCS consists of an embedded hardware unit known as a common control unit (CCU) in combination with Linux-based data acquisition and user interface. The hardware of the CCU is built around the ATmega 128 microcontroller (Atmel Corp.) and is designed with a backplane, master-slave architecture, A Qt-based graphical user interface (GUI) has been developed and the back-end application software is based on C/C++. TELlCS provides feedback mechanisms that give the operator good visibility and a quick-look display of the status and modes of instruments as well as data. TELICS has been used for regular science observations since 2008 March on the 2 m, fllO IUCAA Telescope located at Girawali in Pune, India.