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LPF Science Ground Segment. Paul McNamara LTP Data Analysis Meeting 19/20 February 2007. Summary. Introduction Operations Mission Timeline Ground Segment Overview Science Ops Ground Segment. Introduction . Missions within ESA have two “sides” Project (SCI-P) Science (SCI-S)

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lpf science ground segment

LPF Science Ground Segment

Paul McNamara

LTP Data Analysis Meeting

19/20 February 2007

  • Introduction
  • Operations Mission Timeline
  • Ground Segment Overview
  • Science Ops Ground Segment
  • 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
operations mission timeline
Operations Mission Timeline

T = L + 0

L + 16d

L + 50d

L + 66d

L + 94d

L + 184d

L + 244d


















LEOP = Launch and Early Orbit Phase (apogee raising)

IOOP = In-Orbit Operational Phase (Science Operations)

ground segment overview
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)
interface with prime asu
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.
science ground segment
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
science operations ground segment
Science Operations Ground Segment

Ground Stations

LISA Pathfinder Mission Operations Centre





Mission Operations Center / DDS/ MUST


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


  • Raw HK and s/c TM
  • Processed HK TM
  • -Command timeline
  • -Auxiliary data
  • DRS specific TM
  • LTP raw data

O/B S/W change



(Incl Archive)

LPF Prime


-Mission planning


-Mission planning





Raw and engineering payload

and s/c data

Raw and engineering payload

and s/c data


science ground segment9
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
science ground segment10
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], ……

location of stoc
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
science ground segment14
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)
ltp contributors role
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