Transcript Slide 1

LPF Science Ground Segment
Paul McNamara
LTP Data Analysis Meeting
19/20 February 2007
LISA Pathfinder
Summary
Introduction
Operations Mission Timeline
Ground Segment Overview
Science Ops Ground Segment
LISA Pathfinder
Introduction
Missions within ESA have two “sides”
– Project (SCI-P)
– Science (SCI-S)
SCI-P manages the project up to, and through, on-orbit
commissioning
SCI-S takes control of the mission after commissioning,
i.e. when instrument enters Science Phase
LPF Science Operations will be run through the Science
and Technology Operations Center (STOC)
– This will be managed by the Mission Manager/Project Scientist
The STOC is part of RSSD within ESA, and located at
ESAC, Spain
Mission Operations (s/c health and safety, ground stations
etc) are managed by ESOC
LISA Pathfinder
Operations Mission Timeline
T=L+0
L + 16d
L + 50d L + 66d
L + 94d
L + 184d
LTP Ops
LEOP
Launch
Transfer
Phase
Despin
CommissOrbit
ioning
Corr
DRS Ops
IOOP
SCIENCE OPERATIONS
Separation
Project
L + 244d
STOC
LEOP = Launch and Early Orbit Phase (apogee raising)
IOOP = In-Orbit Operational Phase (Science Operations)
???
LISA Pathfinder
Ground Segment Overview
The LPF Ground Segment consists of 3 parts:
– The Operational Ground Segment (OGS)
– The Science Ground Segment (SGS)
– The interface to the Satellite Prime Contractor (Astrium UK)
The major tasks of the OGS is to perform satellite
(payload and s/c) operations ensuring safety of the
mission. It comprises:
– The Ground Stations
– The Mission Operations Centre (MOC) at ESOC
The Operational Ground Segment details can be found in
the Ground Segment Management Plan (S2-EST-PL5101)
LISA Pathfinder
Interface with Prime (ASU)
The Prime Contractor will interface with LPF to:
– Provide OGS, during Phase C/D, the required deliveries called for
in the MIP
• e.g. Satellite User Manual (SUM)
– Support system validation and listen-in tests as required
– Provide the SGS, during Phase C/D, with the required deliveries
and specialist support concerning the DFACS
– Provide Support during launch and satellite (s/c and payload)
commissioning
– Receive On-Board Software (OBSW) maintenance requests from
MOC and/or STOC and provide MOC with end-to-end validated
images/patches/ On-Board Control Procedures (OBCPs) to be
uploaded to the satellite.
LISA Pathfinder
Science Ground Segment
The major task of the SGS is to plan the utilisation and
related configuration of the technology instruments onboard LPF, and derive from the mission products the
science and technology results.
The SGS consists:
– The Science and Technology Operations Centre (STOC)
• Establish and maintain the Experiment Master Plan (EMP)
• Derive from the EMP the run procedures
• Perform monitoring of the technology instruments and DFACS during all
phases of the mission
• Perform Quick-look data analysis of the ICE telemetry
• Perform full data analysis to extract science and technology results
• Update TC parameters
• Instigate branching of EMP in event of unexpected result
• Archive all available data for later availability (i.e. as reference for LISA)
– The LTP Contributors
LISA Pathfinder
Science Operations Ground Segment
Ground Stations
-OBSM
-OBCP
LISA Pathfinder Mission Operations Centre
(LPF MOC)
Firewall
Mission Operations Center / DDS/ MUST
(ESOC)
- Mission planning
requests
Short and long term planning
requests
-Updated
TC parameter
-
-Raw HK and s/c TM
-Processed HK TM
O/B S/W change
requests
- DRS specific TM
- LTP raw data
-Command timeline
-Auxiliary data
LPF Prime
Contractor
Firewall
STOC
(Incl Archive)
-Mission planning
requests
LTP
Co-Is
-Mission planning
requests
DRS
Raw and engineering payload
and s/c data
Internet
Raw and engineering payload
and s/c data
LISA Pathfinder
Science Ground Segment
STOC, LTP Contributors and the DRS can have access to
data directly from ESOC
– Only authorised data is available to each user
– i.e. DRS will not have access to all LTP data
However, plan is for all users to access data through
STOC
– STOC will provide data in Engineering values
STOC provides single point of contact between Science
Community and the MOC
Data analysis tools will be run within the STOC
– One set of tools will be treated as the Golden Standard
– STOC tools will be under Configuration Control
– LTP Contributors are at liberty (encouraged) to analyse the data,
either with own tool set, or using a copy of the STOC tools.
Data analysis algorithms must be verified prior to launch
LISA Pathfinder
Science Ground Segment
Experimental Master Plan written by STOC with input from
Science Team
– Will be extended to include details of specific procedures (i.e.
discharging of proof mass)
Industrial Procedures will be written by Astrium
– The building blocks of the experimental runs
Run Procedures written by LTP Team and validated by
STOC with LTP/LPF simulator
Satellite database compiled by Astrium UK
Telecommands will be generated and validated by ESOC
Run procedure will look something like
D1[t1s,x1W, y1s], D2[t2s,x2W, y2s], T1[t3,23o], ……
LISA Pathfinder
Run Procedure Validation
s/c Input
LTP Input
MOC
ASD
ASU
FOP
Science Team
LTP User
Manual
LPF User
Manual
FCPs
EMP
DRS Input
Run Procedure
STOC
PIs
TC Interpreter
Experiment
Controller
Environmental
Inputs
DFACS
OBC Emulator
Simulator
Quick
Look
Data
Analysis
Identification of a
change in the run
procedure
Other
Tolols
LISA Pathfinder
Example of Industrial Procedures
LISA Pathfinder
Location of STOC
STOC is being developed in ESAC, Madrid
During s/c commissioning and nominal operations, STOC
will relocate to ESOC, Darmstadt
– Allows faster access to mission planners, Satellite Operations
Manager (SOM), etc
– Nominal operations being treated as a payload commissioning
phase
After nominal ops (during station keeping), STOC
relocates back to ESAC!
– ALL further science operations (DRS and extended mission) will
be run from ESAC
LISA Pathfinder
Science Ground Segment
Science Ground Segment described in more detail in the
Science Operations Scenario Document (S2-EST-PL5005), Science Implementation Plan (LPF-PL-ESAC-DT001), and Science Ground Segment Design Description
(LPF-ESAC-DT-002)
Science Operations Ground Segment to be fully setup by
GS-DPDR (2nd Quarter 2007)
LISA Pathfinder
LTP Contributors Role
During development, the LTP Contributors (LTP-C) will be
involved in defining the procedures for the hardware they
have developed and built
The LPF Science Team will also be involved in the
creation of the Experiment Master Plan
During operations, the LTP-C are required to support the
commissioning of their hardware (as defined in the MLA)
The LTP-C will also be involved in the analysis and
particularly the interpretation of the data
LISA Pathfinder
DA Website