Transcript STELLAR
NURAGHE/ESCS: Telescope driving subsystem Andrea Orlati Medicina, 07/10/2008 1 Nuraghe • Carried on by GAI06 starting from 2004 • The formal goal of the group is to develop the • Designed for the Sardinia Radiotelescope software for the telescope commissioning and • for It’sacceptance modular tests….. We hope it will comparable durability and • • ….but sooner or have later the control software robustness….. must be ready also for hungry astronomers. • http://www.ira.inaf.it/Library/rapp-int/371-05.pdf ESCS • Stands for Enhanced Single-dish Control System • Current Medicina control software is based on Field System, designed for VLBI experiments. • The new K band 7-feeds receiver urged the definition of new requirements for the singledish observations. • http://www.ira.inaf.it/Library/rapp-int/409-07.pdf ESCS NURAGHE Medicina SRT Medicina SRT System overview Requirements • Supported frames: Horizontal, Equatorial, Galactic • Tracking precision: 2 arcseconds • OTF scans – Cross scans • • • • Raster scans Solar System bodies Probes and artificial satellites Catalogues – Calibration catalogues • Simulation mode Technical Specification • • • • • • • • • • • Time Tagged Program Track Auto stow on high speed winds “Istantaneous” offsets from metrology Fault tolerance Events logging Alarms propagation on hardware failures Remote console Code reuse for all telescopes VLBI support Both user and technical documentation LGPL based Tools • • • • • • • • • Platform Scientific Linux (kernel 2.6.9) Development:C++ (99%) and Python Scripting: bash Compilation: GNU Make Database schemas: XML Repository: CVS Documentation: Doxygen and HTML CORBA Vendor: TAO (C++) On-the shelf libraries: curses, slaLibrary, QT Alma Common Software • • • • • • • • Distributed Objects Centralized logger Centralized data base for system configuration Alarms hierachy propagation Error system Multiplatform and multilanguage Component/Container model ACS is based on CORBA ACS architecture Applications 4 - Hi-level APIs and tools UIF libraries Scripting 3 - Services ACS Container 2 - Core components ACS Component 1 - Base tools Developm ent tools ACS Application ACS Installer Framework ...more to come... Serializati Archiving Command Alarm Sampling on Plugs System System System Configuration Data Database channel CORBA Middleware Error System Logging System ACE Time System 5 - Integrated APIs and tools FITS libraries (from Commercial/Shared packages) Astro libraries (from Commercial/Shared packages) Device Drivers Component Diagram Class diagram Observation management Coordinates generator Status • • • • • • • Probes and artificial satellites still missing SRT ACU driver still missing OTF, sidereal tracking fully tested Quite stable during few hours of observation To be tested under production Remote console and FS support almost done Some known bugs are to be tracked down Hopefully we’ll be ready together with acquisition part before winter, so the first 22 Gigs map can be produced People • • • • • Giuseppe Maccaferri (Permanent position) Carlo Migoni (Permanent position) Andrea Orlati (Fixed Term position) Simona Righini (PHD Student) Rashmi Verma (PHD Student) ?