Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 1
LISA Programme
LISAStatus
LISA FranceCollege de France
January 20-21, 2005
A. GianolioLISA Project Manager
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 2
LISA Programme
Following a year of discussion, a programmatic agreement for the LISA project has been reached between ESA and NASA in August 2004
WHY WAS SUCH AN AGREEMENT NECESSARY ? The interface between experiment and spacecraft in LISA
is such that the experiment drives the mission design. System Engineering needs to extend deep into the
definition of the mission elements. The mission reference architecture has to be defined
during Mission Formulation in order to finalize the share of responsibility.
Consequently, all major system engineering decisions have to be agreed by both ESA and NASA.
The way this is implemented requires to be formalized within an inter-agency agreement.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 3
LISA Programme
Decisions
ESA considers it essential that during the whole mission and in particular during mission formulation:
no decision affecting overall mission performance no decision affecting technical design, early
technological investment, cost and schedule of the other partner
can be taken by one partner without explicit and well informed consensus by the other partner.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 4
LISA Programme
Organization principles
Single project with parallel organizational structures in each agency.
Each agency is responsible for discharging its obligations.
Each agency’s project team responds to his own management.
A high degree of interaction is required of the two agencies.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 5
LISA Programme
Mission phases Two mission phases can be identified:
FORMULATION
Definition of mission and system requirements and of mission architecture
IMPLEMENTATION
Procurement of deliverables that fulfil the above requirements
Additionally ESA will introduce the:
DEFINITION
Industrial competitive phase to perform the preliminary design of the ESA deliverables and select the prime contractor for Implementation
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 6
LISA Programme
ESA-NASA Agreement
The main elements of the agreement are:
Project description
Project organisation
System Engineering functions
Mission elements share
The Project description defines the general terms to be adopted throughout the project
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 7
LISA Programme
Definitions LISA Scientific Complement: it includes the LISA
Optomechanical Core Systems (LOCS), the LISA Instrument Metrology and Avionics System (LIMAS), the associated control software, microthrusters (TBC)
Sciencecraft: one spacecraft bus with its LISA Scientific Complement
Constellation: the three LISA sciencecraft operating together.
Joint Project Managers Office (JPMO): LISA project management office composed of the ESA and the NASA project managers and their management support, chaired jointly by the ESA and the NASA project managers.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 8
LISA Programme
Definitions Mission System Engineering (MSE): system engineering
team co-chaired by the ESA, the GSFC and the JPL Mission System Engineering Managers, who have equal authority and report to the JPMO. MSE merges the system engineering teams of ESA, GSFC and JPL.
Mission System Engineering Advisory Team (MSEAT): small advisory body to the Mission System Engineering.
Integrated Technical Advisory Teams (ITAT): technical teams commissioned ad hoc by MSE to provide inputs in specific areas.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 9
LISA Programme
MF Project Organisation
The JPMO, led by the ESA and the NASA project managers, is in
charge of the overall project
The ESA and the NASA project managers share equal
responsibility in the management of the project
The JPMO has to approve, inter alia, the mission reference design
and the requirements
The project will adopt, as far as possible, a single set of procedures,
documentation and reviews
= Advisory function
MSE team
MSEAT
Launch V.
ESA SE Mgr.M. Sallusti
GSFC SE Mgr.C. Mc. Graw
ESA PMA. Gianolio
NASA PMB. Cramer
JPMO
ITATs
Prop. Mod. Ops. S/C bus LOCS LIMAS
JPL SE Mgr.J. Evans
Development offices
ESA-NASA science teamco-chairs
K. Danzmann – T. Prince
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LISA Programme
Programmatic The description of the System Engineering functions
constitutes a fundamental step forward in the cooperation:
it identifies the functions in Formulation and in Implementation
it sanctions the principle that the mission design has to be done jointly, to the level required to clearly define the responsibility of each agency
It establishes that decisions affecting the project cannot be taken unilaterally by one Agency
The implementing structure foresees three SE managers working together to define mission requirements and reference architecture, to be submitted to the approval of the two project managers
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 11
LISA Programme
ITATs ITATs are created by the SE Mgrs upon need and they can
be dissolved once the task is completed.
Their charter is defined by the SE Mgrs
The ITATs composition is defined by the SE Mgrs and can be modified during the existence of the ITAT.
Each ITAT has have a chair appointed by the SE Mgrs
The ITATs can call upon the support of experts for the fulfilment of their charter.
The ITAT chair can, if necessary, advise the SE Mgrs on the need to create a subgroup to address specific issues.
Currently three ITATs are active: the DRS, the IMS and the Constellation
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 12
LISA Programme
DRS ITAT The DRS/GRS ITAT is chartered to provide the SE office
the following inputs:
GRS reference architecture and options
DRS reference architecture and options
Overall acceleration noise error budget
DRS requirements flowdown
GRS Risk List
GRS test (validation and verification) plan
DRS test (simulation) plan
Composition: S. Vitale (chair), M. Sallusti, S. Buchman, S. Merkowitz, T. Hyde
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 13
LISA Programme
IMS ITAT The IMS ITAT is chartered by the SE office to perform the
following tasks: Initially define the IMS architecture including options Define interface between the IMS subsystems Develop an error budget Identify areas that require technology development Develop a prioritized IMS risk list Develop an IMS test plan Define a constellation frequency plan for the space-
space segment Composition: O.Jennrich (chair), K.Danzmann, P.
McNamara, G.Heinzel, D.Shaddock, T.Stebbins, P.Bender, D.Robertson, T.Hyde (obs)
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 14
LISA Programme
Constellation ITAT
The Constellation ITAT is chartered by the SE office to perform the following tasks:
Define constellation concept (functions, system)
Identify DF interfaces to IMS and GRS
Define control requirements on micropropulsion subsystem
Define constellation acquisition strategy and relative requirements on DRS and IMS subsystems
Composition: M.Sallusti (co-chair), S.Merkowitz (co-chair), T.Hyde, D.Bortoluzzi, J.Zeimer
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 15
LISA Programme
Programmatic - SW The agreement for SW includes the following:
Software algorithms and the corresponding code to the level of e.g. MatLab routines will be defined and maintained by MSE throughout the mission lifetime.
Each Agency will independently verify and validate all mission software developed by the other Agency.
Each Agency will exchange models required to support design, verification, validation and operations with the other Agency.
If any of the points above requires specific clearances, NASA will promptly start the required process.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 16
LISA Programme
ESA Contribution
Under the current agreement, ESA is responsible to deliver the LISA Opto-mechanical Core System (LOCS)
The LOCS includes the following:
Gravitational Reference System (GRS)
Structures
Optics
Laser Subsystem
Additionally ESA may deliver three Propulsion Modules (PM).
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 17
LISA Programme
GRS
ESA supplies:
Charge Management System
Vacuum Enclosure
GRS Analog Electronics
JPL supplies:
Test Mass
Caging Mechanism
Electrode Housing
GRS Digital Electronics (TBC)
ESA integrates the GRS
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 18
LISA Programme
Structures
ESA supplies:
GRS – OB Telescope Alignment Structure
Y- Tube
Instrument Thermal Insulation/Control
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LISA Programme
Optics
ESA supplies:
Optical Bench (OB)
JPL supplies:
Photodiodes
CCD’s
Star Trackers
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LISA Programme
Laser Subsystem
ESA supplies:
Laser
Modulator
Laser Stabilisation
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LISA Programme
ESA Contribution – AIV
ESA integrates, verifies and delivers three LOCS to JPL.
ESA supports NASA during all system level LOCS
integration and testing activities.
ESA supports the end to end system verification at GSFC
and at the launch site.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 22
LISA Programme
ESA Contribution – Ops & SW
ESA supports in-orbit commissioning activities and
nominal operations.
ESA performs the Software Independent Verification and
Validation for all flight software.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 23
LISA Programme
JPL Contribution
JPL will be responsible to deliver the LISA Instrument Metrology and Avionics System (LIMAS).
The LIMAS includes the following:
Frequency Distribution Subsystem
Phase Measurement Subsystem
Metrology System C&DH
Metrology System Flight Software
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 24
LISA Programme
JPL Contribution - AIV
JPL develops, integrates and verifies three LIMAS assemblies.
JPL integrates the three ESA-delivered LOCS onto the three LIMAS and verifies them.
JPL verifies Operation and Performance of the three LOCS/LIMAS assemblies with the support of ESA.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 25
LISA Programme
GSFC Contribution
GSFC will be responsible to deliver the following:
Spacecraft Bus including subsystems
Constellation Software (drag-free and acquisition)
Microthrusters (TBC)
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 26
LISA Programme
GSFC Contribution - AIV
GSFC integrates and verifies three Spacecraft Buses.
GSFC integrates and verifies the three LISA Scientific
Complements (LOCS + LIMAS + Control Software +
Microthrusters) onto the three Buses.
GSFC integrates and verifies the three Propulsion
Modules.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 27
LISA Programme
NASA Contribution
NASA procures the launch vehicle (Delta IV)
NASA performs operations via the DSN
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 28
LISA Programme
Mission Formulation ESA has started an industrial contract with Astrium
GmbH for the LISA Mission Formulation on January 17, 2005
The activity will last two years and is divided into two phases, lasting respectively 9 and 15 months
Regular Milestones have been set to ensure consistent system design and to phase work with NASA
Each phase is concluded with a review (Mission Architecture and Mission Definition Review respectively)
Additionally, a Mid-term Review will take place in the middle of phase 2
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 29
LISA Programme
MF tasks Astrium will support ESA in the consolidation of:
- Mission constituents and their interfaces
- Model philosophy
- Error budget apportionment and allocation to the constituents
- Risk assessment and risk management plans
- Mission Requirements in order to allow entering the Definition Phase
- All the other elements required to support discussions with NASA on the share of responsibility
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 30
LISA Programme
MF – Phase 1 The objective of this phase is to consolidate the LISA
mission architecture and design. Main end products will be: a complete set of draft Specs for
the LISA mission elements, the DDVP, Budgets, Tech Plan Among others, the following specific points will be
addressed in phase 1: OB re-design and interfaces with IS telescope and structure Telescope pointing system P/L Avionic and I/F with S/C Error budget Constellation acquisition point ahead Critical review and analysis of the S/C and Propulsion
Module design Mission scenario and Operations
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 31
LISA Programme
MF – Phase 2 A reference design (mechanical, optical, electrical) for the
mission elements will be produced.
Product Tree, IRDs, Functional diagrams, Budgets will be consolidated
Risk assessment and margin policy will be reviewed
Environmental constraints will be reviewed
Key technology identified and technology plan proposed
MRD will be finalized and draft requirements documents for the mission elements will be prepared
The requirements verification logic and methods will be established
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 32
LISA Programme
MF – Short term
Short term (3 months scale) activities will concentrate on the following major architectural issues that have relevance in the definition of a set a requirements for the design:
Use of Telescope/CCD as a Star Tracker
Acquisition and attitude control
Alignment
Point ahead angle
Telescope design
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 33
LISA Programme
Mission Formulation
Mission Formulation has a different meaning at ESA and at NASA and care has to be exercised to avoid confusion:
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 34
LISA Programme
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 35
LISA Programme
Data Processing
European plan of activities:
Request Letter of Intent from interested parties.
Plan to have algorithm in prototype form at the end of 4 yrs period.
Need to the define the e2e data processing cycle with responsibilities and products at the various stages.
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 36
LISA Programme
Data processing 1. Create ad-hoc data processing structure with ESA chair
2. Define goals, plan of work, schedule
3. ESA request sci community LoI
4. Selection of scientists for participation to data processing structure
5. SPC info paper
6. Mtg with selected parties to define plan of work and required funding
7. Selected parties to obtain national funding
8. ESA to place a contract to study and define the LISA data processing architecture
Jan 20, 2005 – LISA France. A.Gianolio – LISA status - 37
LISA Programme
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