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SC 20th, Paris, 15 September 2006 1 Phases and timeline System architecture with support facilities LEOP (Launch and Early Orbits Phase) MIP (Orbit raise)

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Presentation on theme: "SC 20th, Paris, 15 September 2006 1 Phases and timeline System architecture with support facilities LEOP (Launch and Early Orbits Phase) MIP (Orbit raise)"— Presentation transcript:

1 SC 20th, Paris, 15 September Phases and timeline System architecture with support facilities LEOP (Launch and Early Orbits Phase) MIP (Orbit raise) including beginning of life calibrations First station acquisition First observing run (technical) Presentation of commissioning For further information Plan Général des Opérations COROT COR-0-PL-2061-CNES Ed 1.1

2 SC 20th, Paris, 15 September Orientation maneuver Straylight measurement (baffle efficiency) 4 days Launch + 15 days Technical Run Launch + 60 days IR 1 Satellite orientation BOL calibration (cover closed, then opened) Station acquisition phase Payload periodic calibration Solar Wings rotation Cover opening (1st light) Commissioning phase BMPIFAR LEOP Mise à poste CCC MIP Gyro calibration If late launch Technical Run = IR1 Commissioning timeline

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4 SC 20th, Paris, 15 September Components LEOP Entités opérationnelles SSO Entités en support aux opérations Réseau de Communication Centre de Contrôle Station Principale (ICONES) Centre dOrbitographie Opérationnelle Stations 2 GHz TC/TM Stations 2 GHz Localisation Centre dOpérations du Réseau Salle de Contrôle Principale Autorité de Conception Equipe projet COROT Equipe projet filière Proteus Architecte Industriel Satellite CNES PGGS Lanceur (Baïkonour) DMS

5 SC 20th, Paris, 15 September Commissioning Entités opérationnelles laboratoires Entités opérationnelles SSO Entités en support aux opérations Support permanent Phases critiques de mission Centre de Mission Réseau de Communication Centre de Contrôle Station Principale (ICONES) Station Secondaire (ALC) Salle de Contrôle Principale Centre Informatique Atelier Logiciel de Vol Chaîne dExpertise Etalonnages Alerte Transits Planétaires Autorité de Conception Equipe projet COROT Equipe projet filière Proteus Architecte Industriel Satellite CNES INPE CNES LESIA LAM PGGS Station de back-up (VGS) IFA + Interface N1 CDC-LAM Components

6 SC 20th, Paris, 15 September LEOP Phase Tried-and-trusted facilities ICONES : TTCET KRN, TTCET AUS TC/HKTM, doppler data Stations 2 GHz + kit : HBK : TC/HKTM, angular data (kit SEBB monosat) KRN : TC/HKTM, doppler and angular data (kit SEBB multisat) Stations 2 GHz : AUS : angular data Facilities specifically developped Stations 2 GHz : KRU Homère : TC/HKTM, angular data (3801+SLE) Use of ground stations

7 SC 20th, Paris, 15 September Tests of communication (exchange of files) with INPE control center successful Arrival of TTCET in packing cases on Alcantara (INPE) Should be inserted smoothly in the operations during first observing run…

8 SC 20th, Paris, 15 September All system tests completed Radiofrequency compatibilty Ground communications (exchange of files) Tracking of Calipso (twice) Vienna (IFA)

9 SC 20th, Paris, 15 September Negative chronology H0 - 10:20:00 :DMS COROT et LCM Starsem in bunkers H0 - 10:10:00 :Communication checks EGSE checks & battery management operations Abort by customer new attempt within 10 days H0 - 05:00:00 :Removal of thermal cover H0 - 04:20:00 :State Commission for 3-stage LV fuelling Abort by customer new attempt at D+1 H0 - 01:25:00 :3-stage LV fuelling completion H0 - 00:45:00 :VSOTR deconnected, high pressure STVVD ON H0 - 00:30:00 :Servicing platforms retraction H0 - 00:10:20 :SRP (Spacecraft Readiness Panel) for automatic abort H0 - 00:02:30 :Umbilical drop off H0 - 00:00:20 :First and second stage engines ignition Abort by customer not possible If abort by LV, LV is removed from the pad and refurbished H0 :Lift-off Holds authorized Launch and launcher mission

10 SC 20th, Paris, 15 September Annie OK Michel OK Thien OK Launch and launcher mission

11 SC 20th, Paris, 15 September Positive chronology Mission analysis review on Thermal constraints taken into account Short-duration mission separation at H0 + 00:50:02, i.e 28 min before pass over HBK (init sequence completed, LTTM download after TC sending) No separation visibility by Russian ground stations injection confirmed later by Starsem (no mobile station available for real time status over HBK) End of mission after atmosphere re-entry of Fregat Launch and launcher mission

12 SC 20th, Paris, 15 September Launch time Eclipse duration (slot 01/10/2006 to 31/10/2006) RAAN = 14.5°15.7 min RAAN = 194.5°36.5 min Launch and launcher mission

13 SC 20th, Paris, 15 September Launch and launcher mission (positive chronology)

14 SC 20th, Paris, 15 September Separation and first orbits Séparation Launch and launcher mission (positive chronology)

15 SC 20th, Paris, 15 September LEOP (D1) 7 min Init and deployment sequence Triggered by reconfiguration module (RM) after detection of separation Boot of on-board processor (PM) and drivers Once active, the on-board software executes the automatic sequence for solar wing deployment (+Y, then -Y) Gyros ON for unfolding monitoring, then OFF The CCC orders the spacecraft to switch from SAFE to REDUCED command & control mode 2 h AOCS automatic sequence to BBQ RDP0 : Rate Damping Phase – 0, RDP1 : Rate Damping Phase – 1, SPP : Sun Pointing Phase, BBQ :Barbecue (<0.37°/s) -Xs towards the Sun MAG + MTB MAG + CSS + MTB MAG + CSS + MTB + 2 RW

16 SC 20th, Paris, 15 September LEOP (D2,3) The CCC authorizes the spacecraft to send payload housekeeping telemetry (DTM + HKTMR : CUIVRE 1, 2, CUTH) All avionics are set to ON : GPS, STR, 2 gyros, et 2 additional reaction wheels STAM preparation and GPS data available for orbit computation by G2 STAM (Star acquisition mode) STAM Helio (+ ramp) : speed reduced to 0.25°/s and convergence of the kinetic momentum towards Sun (in the back) STAM Inertial : speed damped to 0 et and canonical rendez-vous towards the inertial reference frame (optimal roll) MAG + CSS + MTB + GYROS + STR + 4 RW High-rate TM emission (733 kbits) and GPS datation available NOM AOCS and NOM CC

17 SC 20th, Paris, 15 September Opening of the cover, in visibility Cover surveillance inhibition Release (heating of a shape memory alloy) MIP (beginning of life) Maneuvers (OCM2) to calibrate thrusters Maneuvers (OCM4) for orbit corrections Gyro calibration Payload is set to ON Checks of temperatures Authorization of on-board FDIR algorithms Selection of master clock (BS2) Thermal regulation set to ON BS2, ETN, BCC set to ON (in this order) After PBS boot, payload is ready to receive TC 1553 The satellite is ready for the first station acquisition phase Beginning of life calibrations (cover closed)

18 SC 20th, Paris, 15 September To keep a capacity in V to Make the mission richer : orbit plane drift after a year of operation (stellar fields closer to the eye center) End of life : perigee maneuver to accelerate the spacecraft deorbitation (IADC recommendations) Target orbit Semi-major axis: 896 km eccentricity: frozen orbit Inclination, : stability of the orbit plane ( = 14.5 in J2000) Orbit correction strategy

19 SC 20th, Paris, 15 September Precision of injection (osculated) parameters Orbit correction strategy

20 SC 20th, Paris, 15 September Correction of errors (1/2) Semi-major axis Dispersions at 3 : 5 km No strong mission constraint Minimal correction (Hohmann transfer of 1.5 km) if necessary to manage the risk of collision with Fregat if no reentry (contingency) Reminder : no altitude control after opening of the cover Eccentricity Dispersions at 3 : Mission constraint : e MOY < over 3 years Compatible with natural drift (if perigee well chosen) No specific correction expected Orbit correction strategy

21 SC 20th, Paris, 15 September Correction of errors (2/2) Inclination Dispersions at 3 : degrees Mission constraint : stability of the orbit plane (before orbit drift) V (11 /s) applied at a node by series of 2 thrusts RAAN Dispersions at 3 : 0.12 degrees Mission constraint : RA of the eye center The depointing capacity of the satellite is fully compatible with this dispersion No correction expected Orbit correction strategy

22 SC 20th, Paris, 15 September Fuel budget LEOP : roughly 12 m/s (worst case) Orbit correction strategy

23 SC 20th, Paris, 15 September times a year Spacecraft orientation (coupled with housekeeping maneuvers if needed) Transition - step by step - toward Observation mode Programming of 1. Asteroseismology channels 2. Exoplanet channels Operations in Mission Center are twofold Scientific / Command and Control The station acquisition phase To start and feed Mission ACS Mode Scenario over 7 days

24 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Station Acquisition CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Mode flower

25 SC 20th, Paris, 15 September Choice of a field among some candidates (Scientific Committee) Dates of beginning/end of run Checks for technical feasibility Attitude Quaternion for the selected field Alpha=101.72;delta=-0.2 Rot=7.28 Preliminary step Spacecraft attitude maneuver for a new run Tool Corotsky

26 SC 20th, Paris, 15 September Preliminary step Spacecraft attitude maneuver for a new run

27 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Preliminary step

28 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 1

29 SC 20th, Paris, 15 September Step 1 Astero channel Sky recognition Identification of stars Instrument geometric calibration Tools Findstars/Identstars Extraction of stellar objects (with mv) Removal of offset, sky background, cosmics, electronic gain and smearing Threshold for thresholded images Identification of targets (using Tycho catalog) Instantaneous line of sight Full images Tool Alpage Focal plane cartography Optical distortion reestimate (polynomial) 2 x 3 images 2 successive orbits CCD A1 CCD A2

30 SC 20th, Paris, 15 September PROTEUS platform Star Tracker field of view Zs-

31 SC 20th, Paris, 15 September ANTICENTER Autumn (close to J280) Zs- toward the Sun Star Tracker unavailable over the night side of the Earth Step 1 Ys+ Zs- S STR masked by the Earth

32 SC 20th, Paris, 15 September ANTICENTER Spring (close to J94) Zs- not toward the Sun Star Tracker unavailable over the day side of the Earth Step 1 Ys+ Zs- S STR masked by the Earth Better case

33 SC 20th, Paris, 15 September Conventional orbital position PSO trans Instant of transition STR masked by the EarthIncluding roll angle PSO trans Favorable position all over the year

34 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 2

35 SC 20th, Paris, 15 September Step 2 Astero channel Tool Identstars Time series of seamark positions : - 64 couples of thresholded images / orbit - 50 seamarks by image (both CCD) - quality flags Instantaneous line of sight Tool Alpage Line of sight orbital variation Bias between payload and platform (on each axis) Delta_quaternion at PSO trans XVXV YVYV 0 E2 CCD A1CCD E1 CCD E2 CCD A2 0 E1 0 A1 0 A2 + Trajectory of seamarks (e.g over 3 orbits) Expected position + + PSO trans x y Thresholded images +

36 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 2

37 SC 20th, Paris, 15 September Step 2 Astero channel Tool Corotsky Bias incorporated into Q_att Tool Findstars/Identstars Line of sight control Extraction of additional stellar objects (if necessary) CCD A1 CCD A2 + + PSO trans Expected position Full images 1 image Once correction maneuver completed : 15 arcsec (3 ) 360 arcsec (3 )

38 SC 20th, Paris, 15 September Validated during system tests Blind static test with thresholded images produced by instrument test bench (with video simulator) Q_att step2 G2 Identstars/Alpage/Deltachoice Bias : psi = theta = phi = Recorded in BDE Q_att step0 G2 Sign and amplitude are correct Error < 4 arcsec Including max error Alpage < 1 arcsec Corotsky Line of sight (target) : Alpha = Delta = Roll = 0.0 Corotsky Line of sight (corrected) : Alpha = Delta = Roll = 0.0 Threshold images (N0) Line of sight (simulated) : Alpha = Delta = Roll = 0.0 Bias computation

39 SC 20th, Paris, 15 September Step 3 Astero channel Tools Sismowind/Sismoparam Windowing - large window memory plan (PMG) - scientific memory plan (PMS) Set of constraints - size and position of objects - CCD readout time - EMC patterns (crosstalk) Generation of telecommand parameters - Camera controller (CS16) - Extraction unit and DPU (TC 1553) Checks on EM test bench before uploading CCD A1 CCD A2 Large window Small window Dark window

40 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 3

41 SC 20th, Paris, 15 September Step 3 Astero channel CCD A1 CCD A2 Once rough ecartometry is running : DPU 1/2 selected as nominal input ACS estimator ON Orbital behavior analysis (4/6 orbits) Large window PROTEUS MI-BO mode VEG mode

42 SC 20th, Paris, 15 September Step 4 Astero channel CCD A1 CCD A2 Large window VEG mode Switch to ACS Mission mode when flying over the PSO trans Orbital behavior analysis (1 orbit) PROTEUS MI-BF mode

43 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 4

44 SC 20th, Paris, 15 September Step 4 Astero channel CCD A1 CCD A2 Small window Dark window Switch from PMG to PMS Spacecraft attitude definitely driven by instrument guide stars Orbital behavior analysis (2 orbit) PROTEUS MI-BF mode VEF mode Guide stars

45 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 5

46 SC 20th, Paris, 15 September Step 5 Exo channel Sky recognition Identification of bright stars Instrument geometric calibration Identification of all stars Tool Exowind Removal of offset, sky background, cosmics, electronic gain, smearing and EMC patterns Identification of saturating stars Selection of bright objects for calibration Focal plane cartography Optical distortion reestimate (polynomial) Once geometry is reestimated : Identification of stellar objects (using Exodat) Extraction of PSF as a function of : - spectral type - position in the field of view Full images 64-exposure 128-exposure 3+1 accumulations 4 successive orbits CCD E1 CCD E2

47 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 6

48 SC 20th, Paris, 15 September Step 6 Exo channel Upload of windowing Validation (subset of objects) Tool Exowind Tool VPM process Subset of 500 windows/CCD Geometric/SNR control Automatic process to assign a mask to each Exobasket stellar object PSF fitting/SNR optimization Generation of telecommand parameters - Extraction unit and DPU (TC 1553) Checks on EM test bench before uploading mv= pxmv= px mv= px mv=15 -55px Alternate method under implementation 256 templates / CCD

49 SC 20th, Paris, 15 September VEILLE SAFE OFF VALIDATION ECARTOMETRIE GROSSIERE VALIDATION ECARTOMETRIE FINE VALIDATION IMAGE EXOPLANETES VALIDATION IMAGE ASTERO VALIDATION PLAN DE MASQUES Ê OBSERVATION Ë Ì Í Î Ï Phase de Mise en station CALIBRATION PERIODIQUE Modes dédiés aux CALIBRATIONS DEBUT DE VIE Transition on TC Transition on TC with automatic return Order number in a nominal sequence Transition on anomaly (automatic) Transition on PROTEUS configuration change Ê, Ë,... Step 7

50 SC 20th, Paris, 15 September Step 7 Both channels Start of scientific processes Tool Sismomask Upload of optimized photometric masks PSF fitting/SNR optimization Start of all scientific software processes Telemetry production : light curves, seismology mask images and exoplanet imagettes Tool Alert function Targets oversampled on request in case a transit event is expected List of other oversampled objects (selected APs)


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