lisa programme jan 20, 2005 – lisa france.a.gianolio – lisa status - 1 lisa status lisa france...

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


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.


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.


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.


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


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


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.


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.


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


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


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


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


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)


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


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.


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).


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


LISA Programme

Structures

ESA supplies:

GRS – OB Telescope Alignment Structure

Y- Tube

Instrument Thermal Insulation/Control


LISA Programme

Optics

ESA supplies:

Optical Bench (OB)

JPL supplies:

Photodiodes

CCD’s

Star Trackers


LISA Programme

Laser Subsystem

ESA supplies:

Laser

Modulator

Laser Stabilisation


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.


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.


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


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.


LISA Programme

GSFC Contribution

GSFC will be responsible to deliver the following:

Spacecraft Bus including subsystems

Constellation Software (drag-free and acquisition)

Microthrusters (TBC)


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.


LISA Programme

NASA Contribution

NASA procures the launch vehicle (Delta IV)

NASA performs operations via the DSN


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


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


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


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


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


LISA Programme

Mission Formulation

Mission Formulation has a different meaning at ESA and at NASA and care has to be exercised to avoid confusion:


LISA Programme


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.


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


LISA Programme

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lisa programme jan 20, 2005 – lisa france.a.gianolio – lisa status - 1 lisa status lisa france...

Documents

lisa programme

lisa sciencecraft

gianolio lisa status

lisa project management

lisa instrument metrology

project slide

mission design

mission formulation