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The Project

 

Objectives

The objective of this project is to deliver the WEAVE instrument, a new wide-field spectroscopy facility for the prime focus of the 4.2-m William Herschel Telescope.  This project will comprise the delivery of a new two-degree field of view prime focus corrector, a 1000-multiplex fibre positioner and a dual-beam spectrograph.  A small number of individually deployable integral field units and a large single integral field unit will also be available within the fibre positioner.  Both the IFUs and the MOS fibres will feed the spectrograph that will provide full coverage of the majority of the visible spectrum. The project will include all deliverables necessary so that the ING may operate the instrument in fulfilment of the scientific objectives.

Approach

A fundamental premise for the instrument construction is that development work will only be carried out when no other alternative exists for producing the constituent products, and such development work will be kept to the minimum required to deliver the project.  Thus, where possible, the use of commercial-off-the-shelf products will be preferred.  This has the advantage of reducing the project costs and allowing the project and the end product to benefit from tried-and-tested technologies that are often widely available.  For specialised services and products, the project will endeavour to seek such items from within the technical capabilities of the consortium provided that this is a cost-effective and efficient solution.  Likewise, the project will be managed entirely from within the consortium.

Scope

The WEAVE Project will deliver the fibre-fed MOS instrument for the WHT consisting of the fibre positioner, the spectrograph, the instrument control software, the science data processing software and the data management and archiving system.  The enhanced prime focus corrector will also be delivered as part of this project.  It will also provide the observatory operational model required to support science data delivery following project closure.

Exclusion

The project will not deliver the science, as this is out of scope of this particular project.  Delivery of the science will be addressed in conjunction with the ING Board, the Project Board and the observatory.

Structure

The project will be structured into a pre-project stage, followed by five managerial stages each with its own detailed plan.  The pre-project stage will focus on starting up the project by assembling the Project Management Team, defining how the project will be approached, defining the project files and controls, initiating development of the WEAVE science cases and establishing an initial breakdown structure to assign work to the Project Team.

The project stages are shown below:

Stage

Description

1

Requirements capture and delivery specifications

2

Preliminary design followed by a preliminary design review

3

Final design followed by a final design review and procurement of long-lead time items

4

Manufacturing, assembly, integration and testing (MAIT)

5

Commissioning, operational handover and project closure

  

Work Package Assignments and Status

The WEAVE project is divided into nine technical systems and these are  driven by the high-level instrument architecture.  There are also seven managerial systems driven by the project management plan.  Each system is divided into a number of work packages and these work packages are assigned to an institution for delivery.  The systems, the work packages, the responsible institutions and the status of each activity are shown below:

 

 WP ID System Name Work Package Institutions Status

 

Two-degree Prime Focus System (PRI) 

 

 

 

WP-01-01

 

Management of the prime focus corrector system

ING

On-going

WP-01-02

 

Prime Focus Corrector unit

ING, IAC

Stage 3

WP-01-03

 

Field rotator

ING, IAC

Stage 3

WP-01-04

 

Top-end support structure

ING, IAC

Stage 4

WP-01-05

 

Prime Focus Corrector Optics

ASTRON, ING

Stage 4

 

 Fibre Positioner System (POS)

 

 

 

WP-02-01

 

Management of fibre positioner system

Oxford

On-going

WP-02-02

 

Obsolete

 

 

WP-02-03

 

Tumbler and fibre positioner

Oxford

Stage 4

WP-02-04

 

LIFU assembly

RUG, Oxford

Stage 4

WP-02-05

 

Obsolete: system change – now WP-01-03

 

 

WP-02-06

 

A&G camera subsystem

ING

Stage 4

WP-02-07

 

Fibre positioner software

STFC-RAL

Stage 4

 

 Fibre Systems (FIB)

 

 

 

WP-03-01

 

Management and delivery of the fibre system

GEPI

On-going

WP-03-02

 

MOS and non-science fibre subsystems

GEPI

Stage 4

WP-03-03

 

The LIFU fibre subsystem

RUG, GEPI

Stage 4

WP-03-04

 

The mIFU fibre subsystem

RUG, GEPI

Stage 4

 

 Spectrograph System (SPE)

 

 

 

WP-04-01

 

Management of spectrograph system

ASTRON

On-going

WP-04-02

 

Spectrograph

ASTRON

Stage 4

WP-04-03

 

Spectrograph optics

STFC-RAL, ASTRON, INAF, INAOE

Stage 4

WP-04-04

 

Science detectors

LJMU

Stage 4

 

 Observatory Control System (OCS)

 

 

 

WP-05-01

 

Management of the observatory control system

ING

On-going

WP-05-02

 

Instrument  control system

ING

Stage 3

WP-05-03

 

Observation queue scheduler

ING

Stage 3

WP-05-04

 

Engineering interface

ING

Stage 4

WP-05-05

 

Quick-look Module

Cambridge

Stage 3

WP-05-06

 

Data acquisition subsystems

ING

Stage 4

WP-05-07

 

Observation Blocks Manager

ING

Stage 3

WP-05-08

 

Modifications to the existing telescope control system

ING

Stage 3

WP-05-09

 

Prime focus corrector control system hardware

IAC

Stage 4

WP-05-10

 

Spectrograph control system hardware

IAC

Stage 4

WP-05-11

 

Prime focus corrector control system software

IAC

Stage 4

WP-05-12

 

Spectrograph control system software

INAF

Stage 4

WP-05-13

 

Obsolete : system change - Now WP-02-07

 

 

WP-05-14

 

Field rotator control system hardware

IAC

Stage 3

WP-05-15

 

Field rotator control system software

IAC

Stage 3

WP-05-16

 

Observation sequencer

IAC

Stage 3
  Core Processing System (CPS)

 

 

 

WP-06-01

 

Management of Core Processing System

Cambridge

On-going

WP-06-02

 

Quicklook data module

Cambridge

Stage 4

WP-06-03

 

L0 data module

Cambridge

Stage 4

WP-06-04

 

L1 data modules

Cambridge

Stage 4
  WHT support facilities (WSF)

 

 

 

WP-07-01

 

Management of support facilities

ING

On-going

WP-07-02

 

Storage and handling equipment

ING, IAC, Oxford, ASTRON,  GEPI

Stage 4

WP-07-03

 

Focal plane calibration module

ING

Stage 3

WP-07-04

 

Modification of stand-alone test facility

ING

On-going

WP-07-05

 

Installation of cables

ING

On-going

WP-07-06

 

Supply of services

ING

On-going

WP-07-07

 

Telescope performance

ING

Completed
  Advanced Processing System (APS)

 

 

 

WP-08-01

 

Management of Advanced Processing System

IAC

On-going

WP-08-02

 

Spectral Classification and Redshift Determination Module

IAC

Stage 4

WP-08-03

 

Stellar Analysis Module

IAC

Stage 4

WP-08-04

 

Galaxy Analysis Module

IAC

Stage 4

WP-08-05

 

APS IFU Analysis Module

IAC

Stage 4
  WEAVE Archive System (WAS)

 

 

 

WP-09-01

 

Management of WEAVE Archive System

INAF

On-going

WP-09-02

 

Internal release archive subsystem

INAF

Stage 3

WP-09-03

 

Public release archive subsystem

INAF

Stage 3
  Business Case

 

 

 

WP-20-01

 

Create and manage the WEAVE business case

ING

On-going

WP-20-02

 

Project Scientist Role

RUG

On-going
  Project Management

 

 

 

WP-21-01

 

Project Management

ING

On-going
  Controls

 

 

 

WP-22-01

 

Project Controls

Oxford, ING

On-going
 

End-user Documentation

 

 

 

WP-26-01

 

Engineering manuals

ING

On-going

WP-26-02

 

Operations and maintenance manuals

ING

On-going

WP-26-03

 

User manuals

ING

On-going
 

Project Office

 

 

 

WP-27-01

 

Project Support Office

ING

On-going
 

System Engineering Procedures

 

 

 

WP-28-01

 

Systems Engineering

STFC-RAL

On-going

WP-28-02

 

Obsolete

 

 

WP-28-03

 

Instrument Scientist Role

ING

On-going
 

Health and Safety

 

 

 

WP-29-01

 

Manage WEAVE Health and Safety System

ING

On-going

 

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