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ATST Virtual Instrument Concept. ATST Conceptual Design Review 27 Aug 2003. Virtual Instrument. Science requirements Flexible, laboratory-style environment Save the data and the associated component states. Software must not constrain the requirements (but it does constrain the solutions!)

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ATST Virtual Instrument Concept


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atst virtual instrument concept

ATST Virtual Instrument Concept

ATST Conceptual Design Review

27 Aug 2003

virtual instrument
Virtual Instrument
  • Science requirements
    • Flexible, laboratory-style environment
    • Save the data and the associated component states.
    • Software must not constrain the requirements
      • (but it does constrain the solutions!)
  • A model for instrument development
    • Delivery of a standard instrument template to build upon
    • Common control behavior
    • Simplified instrument setup and take down
    • Code reuse reduces overall development costs and improves maintainability
  • The Virtual Instrument is discussed in ATST Document RPT-0011
component model
Component Model
  • There are no instruments
    • only experiments needing control over components
    • (Ok, some ‘canned’ sets of components comprise facility instruments: ViSP, NIRSP, ViSTF, WBF, etc.)
  • Synchronicity provided by software and communications bus
    • Ownership, start/stop times, index synchronization.
  • AO and Telescope are also components that may be shared among virtual instruments

Physical

Device

Software

Device

Component

Container

Virtual

Instrument

accessible services
Accessible Services

Command Channel

  • sends synchronized messages

Connection Service

  • Register name and find others by name.

Database Service

  • Get defaults, save headers.

Notification Service

  • Subscribe and publish events.

Archive Service

  • Log and debug information.

Synchronization Service

  • Hardwired connections

Connection

Service

Database

Service

get defaults &

save headers

register &

find others

commands

Component

log & debug

subscribe &

publish events

Archive

Service

Notification

Service

Synchro

Service

types of components
Types of Components
  • High-level Components
    • Sequencers send commands in order and synchronize the responses.
    • Controllers execute downloaded scripts.
  • Mid-level Components
    • Multi-axis, data handling.
  • Low-level Components

CamerasSpectographsMechanismsOthers

Near-IR Visible Slit Jaws AO

Thermal IR Near-IR Dichroics Polarizer

Visible Thermal IR Filter Wheels Rotator

Lyot Stops WFS

Tuneable Filters Telescope

virtual instrument1
Virtual Instrument

OCS

TCS

TCS

ICS

DHS

Component

VI

NIrSP

ViSP

VisTF

VI

VI

VI

Component

Component

Available Components

Driver

Component

Component

Component

Component

Component

Component

Driver

Component

Driver

Component

Driver

Component

Component

Component

Component

Component

Component

Driver

Hardware

slide7

An Instrument Configuration

AO

AO-Cam

Image

ATST Coude Focus

G-Band

Visible

High Resol.

Spectroscopy

Image

dichroic

Reflection slit-jaw

Visible Polarimetry

Near-IR Polarimetry

WL Camera

an instrument configuration redux

G Filter

G Filter

G Filter

Slit Jaw

An Instrument Configuration Redux

TCS

VI

AO

Sequencer

Camera

Dichroic

Near IR

Polarimeter

Visible

Polarimeter

Visible

Camera

Visible

Camera

G Filter

G Filter

G Filter

Slit Jaw

G Filter