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Rosetta Payload Modeling: Resource Management and Conflict Detection

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Analysis of past executed operations (scenarios) Conclusions ... GIADA. RPC. MIRO. MIDAS. ALICE. COSIMA. VIRTIS. Planetary Missions Division. RO-EST-HO-3421 ... – PowerPoint PPT presentation

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Title: Rosetta Payload Modeling: Resource Management and Conflict Detection


1
Rosetta Payload ModelingResource Management
andConflict Detection
  • Ruben Solaz
  • V.Dhiri, D.Koschny, K.Wirth, P.v.d.Plas,
    M.Sarkarati

Introduction Payload modelling and SW
tools Analysis of past executed operations
(scenarios) Conclusions and open point presented
at the SpaceOps2006 21 Jun 2006
2
Introduction (1) Rosetta mission
  • Target comet 67P/Churyumov-Gerasimenko
  • Launched on Feb 2004
  • Gravity assist manoeuvres Earth/Mars swing-bys
  • gt18 months ops at comet, starting Aug 2014
  • ? monitoring of evolution of cometary
    activity from apheliom to periheliom
  • ? deployment of a lander unit for in-situ
    measurements
  • Secondary science target asteroids

3
Introduction (2) Payload and needs
NEED TO MODEL PAYLOAD
NEED TO PLAN PAYLOAD OPERATIONS
4
Introduction (3) parties involved
5
SW tool for Payload ops planningExperiment
Planning System (EPS)
6
Experiment Definition File (EDF)Highlights
  • EDF syntax aims at simplicity
  • ASCII, human readable
  • Short implementation time (1 2 weeks)
  • Easily expandable
  • It is not a programming language
  • Limited math computations
  • Transients/peaks not modelled

MODELLING STEPS
7
EDF modelling (1) Modes, Modules and their
power datarate
8
EDF modelling (2)telecommands-sequences their
PW and DR
9
EDF modelling (3)Constraints and Conflicts
  • RSOC planners paramount importance of early
    detection of conflicts
  • The EDF of an instrument might contain many (or
    no) constraints.
  • EPS executor cross-check all constraints and
    (might) flag a conflict
  • Degree of severity is shown (fatal, warning, etc)
  • Examples of flagged conflicts
  • Intra-instruments-interferences Inst. A signal
    distorted when Inst. B cooler is ON
  • Intra-Instrument When Inst. A is in SCAN mode,
    only a subset of sequences allowed
  • Geometric Boresight of Inst. A has to be 45 deg.
    from the sun.
  • Environmental Inst. A should not be operated
    while S/C doing a wheel off-loading
  • Parametric Wrong values passed to a sequence
  • Capacity Inst. A memory partition is full.

10
EDF modelling (4)spacecraft memory and dumping
11
EDF modelling (5)spacecraft memory and dumping
(2)
12
EDF modelling (6)Field of Views (FOV)
13
Analysis of real scenarios (1)modes timeline
visualization
14
Analysis of real scenarios (2)power plots
15
Analysis of real scenarios (3)SSMM filling-up
and dumping to ground
16
Rosetta Current Payload Status
17
Conclusions and open points
  • Models currently actively used for planning at
    RSOC
  • Models accuracy validated and deemed sufficient
    for all cruise-phase (May 2014)
  • Modelling of HK data open.
  • Further modelling of interference among
    instruments envisaged after outcome of
    Interference Scenario (Jul-2008)
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