... Charge Coupled Devices (CCD) are currently by far the most widely used type of detector in astronomy. ... After a brief introduction to the VLT Control System, the VLT CCD Detectors Control Software is presented. The VLT Control System is a distributed system consisting of a set of UNIX Workstations, dedicated to high level operations, such as coordination of sub-system activities and interface to the users, and VME-based Local Control Units (LCU), dedicated to the control of sub-systems hardware. ...

Slithead identification (which slithead is installed?) will be sensed and reported by the on-board spectrograph computer. ... Observer's software to handle spectrographic observations will be written by JHU and installed on the Fermilab supplied observatory workstation. ... UW will be responsible for the slithead latch-down control. ... Database computer at APO: The observer's software will query the observatory database for information on the currently installed fiber cartridge. ...

Fasti is an innovative design for infrared detector control. ... to use largely accepted standards as boundaries, as a PCI bus, a parallel interface or a serial, and to use few of them . ... The building blocks of Fasti are: . ... the serial bus for controlling housekeeping devices (temperature and pressure sensors or motor controllers) and programming data acquisition . ... Though not so fast, and lacking some forms of data integrity check, this bus is so widely used to be nearly unavoidable. ...

FGS Instrument Handbook for Cycle 24 . ... Fine Guidance Sensor Instrument Handbook for Cycle 24 > Appendix A: Target Acquisitionand Tracking > A.1 FGS Control . A.1 FGS Control . ... The first is the 486, which controls the HST spacecraft and its pointing control system. ... During astrometric science observations, control is shared by the two computers: the FGE operates the FGS during Position mode, while the 486 operates the FGS during Transfer mode scans. ...

... Meade Instruments Corporation . ... Autostar Computer Controller Instruction Manual . Autostar Computer Controller . ... NOTE: This manual covers both Model #495 Autostar and #497 ETX Autostar Computer Controllers. ... Autostar Primary Menus and Options . ... Chapter 3: Alignment . ... Guided Tour Menu . ... Chapter 5: Autostar Menu Functions . ... Meade Autostar Computer Controller . ... Meade #505 Connector Cable Set Manual . ... Copyright 2006 Meade Instruments Corporation, All Rights Reserved. ...

Vertex Contract in Hindsight Computer driven control system design philosphy A contract for a complex software-driven system should include: 1. ... A complicated system should contain its own development system, i.e. it should be possible to program and reprogram the system from its own operating console or terminal. ... A general and flexible approach for our pointing system would be to have all the sensors and effectors connected to an upstairs unit that is driven by a fast Ethernet connection. ...

... Science . ... Science Users Information > Observing Facilities > Instrumentation Development > VLT/Instrument Interfaces . ... APEX Visitor Instrument . ... The interfaces between the VLT Unit Telescopes and the scientific instruments to be operated at the VLT Cassegrain, Nasmyth and Coudц© foci are well defined. ... Interface and numerous other relevant information for instrument builders is available in the "Requirements for Scientific Instruments on the VLT Unit Telescopes" , ESO doc. no. ...

A computer controlled low light photometer for nightglow observations. Hardware units of portable photometer for low light measurements, especially night glow emission is described. ... Interface card contain three channels of 24 bit counter, 4 channels of 12 bit ADC and the buffer bus for the controlled motors of the altazimuthal fork mounting and filters wheel, the position encoders. ... Where N( ) is output signal photometer generated input light flux F( l ) . ... PMT # . 599 . ...

... The user database is traditionally contained in the /etc/passwd љ file. Some systems use shadow passwords , and have moved the passwords to /etc/shadow љ . ... However, installing shadow passwords later onto a system that did not support them can be difficult. ... The crack љ program can be used to crack passwords; any password it can find is by definition not a good one. ... The user group database is kept in /etc/group љ ; for systems with shadow passwords, there can be a /etc/shadow.group љ . ...

MRO-ICD-CAM-1100-0108 FTTNAS-FTTA.odt Page 1 of 7 MRO FTT / NAS FLC ICD FTT / NAS Electronics to FTTA Controller ICD MRO-ICD-CAM-1100-0108 The Cambridge FTT Team Rev 1.0 9 May 2013 Cavendish Laboratory JJ Thomson Avenue Cambridge CB3 0HE UK MRO-ICD-CAM-1100-0108 FTTNAS-FTTA.odt Page 2 of 7 ICD Description ... 2.1 Signal definitions.. ... The analogue input interface in the FTT-NAS electronics interface is to accept the full range of output available, specifically: 1. ...

... The tracking system works in micro-step regime with a computer step of correction = 0.003 arcsec per second of time and a maximum speed of correction up to 4.6 arcsec per second of time. ... The APD module was constructed for performing experiments of receiving of 2 Mbps signals from “ARTEMIS” using the Cassegrain focus of 0.7m telescope. ... GaAs PIN photo diode. ... Laser module with thermoelectric stabilisation of laser diode. ... Electronic module for turbulence compensation system . ...