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 | NOVA (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 | NOVA (ASTRON) | On-going | |
WP-04-02 | Spectrograph | NOVA (ASTRON) | Stage 4 | |
WP-04-03 | Spectrograph optics | STFC-RAL, NOVA (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, NOVA (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 |