LPF Science Ground Segment

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LPF Science Ground Segment

• Paul McNamara
• LTP Data Analysis Meeting
• 19/20 February 2007

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Summary

• Introduction
• Operations Mission Timeline
• Ground Segment Overview
• Science Ops Ground Segment

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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

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Operations Mission Timeline
T L 0
L 16d
L 50d
L 66d
L 94d
L 184d
L 244d
LTP Ops
DRS Ops
???
Despin Orbit Corr
IOOP SCIENCE OPERATIONS
Transfer Phase
Commiss- ioning
LEOP
Launch
Separation
Project
STOC
LEOP Launch and Early Orbit Phase (apogee
raising) IOOP In-Orbit Operational Phase
(Science Operations)
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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-PL-5101)

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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.

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Science Ground Segment

• The major task of the SGS is to plan the
  utilisation and related configuration of the
  technology instruments on-board 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

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Science Operations Ground Segment
Ground Stations
LISA Pathfinder Mission Operations Centre (LPF
MOC)
-OBSM -OBCP
Firewall
Mission Operations Center / DDS/ MUST (ESOC)

• - Mission planning
• requests
• Short and long term planning requests
• -Updated
• TC parameter

Firewall

• Raw HK and s/c TM
• Processed HK TM
• -Command timeline
• -Auxiliary data

• DRS specific TM
• LTP raw data

O/B S/W change requests
STOC (Incl Archive)
LPF Prime Contractor
-Mission planning requests
-Mission planning requests
LTP Co-Is
DRS
Raw and engineering payload and s/c data
Raw and engineering payload and s/c data
Internet
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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

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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
• D1t1s,x1W, y1s, D2t2s,x2W, y2s, T1t3,23o,

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Run Procedure Validation
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Example of Industrial Procedures
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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

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Science Ground Segment

• Science Ground Segment described in more detail
  in the Science Operations Scenario Document
  (S2-EST-PL-5005), Science Implementation Plan
  (LPF-PL-ESAC-DT-001), and Science Ground Segment
  Design Description (LPF-ESAC-DT-002)
• Science Operations Ground Segment to be fully
  setup by GS-DPDR (2nd Quarter 2007)

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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

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