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THEMIS-SCM

THEMIS-SCM. THM – SCM – CDR – 08-April-2004 in Velizy Test and Calibration Plan I&T Plans prior to shipment to UCB EGSE Design I&T and Spacecraft Integration Plans Implementation Schedule. Bertrand delaPorte. THM-SCM-CDR – 2004.04.08. THEMIS-SCM.

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THEMIS-SCM

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  1. THEMIS-SCM • THM – SCM – CDR – 08-April-2004 in Velizy • Test and Calibration Plan • I&T Plans prior to shipment to UCB • EGSE Design • I&T and Spacecraft Integration Plans • Implementation Schedule Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  2. THEMIS-SCM SCM VERIFICATION – TEST MATRIX (1) : is the M.o.I. requested ? Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  3. THEMIS-SCM I&T plans prior to delivery – SCM – SC (Sensor) Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  4. THEMIS-SCM I&T plans prior to delivery – SCM – PA 3D+ cubes Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  5. THEMIS-SCM I&T plans prior to delivery – SCM – full PA Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  6. THEMIS-SCM SCM - EGSE • For Bench Test : • mu-metal box (to put the sensor inside) – one only ? • EGSE Interface Box (to be plugged to the PA) • Power Supply +/-10V, Signal Generator, Oscilloscope, multimeters • For Integration in the spacecraft • mu-metal box • Signal Generator • Portable PC + dedicated software, to be connected to the Themis acquisition system (in a LAN or via Internet) Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  7. THEMIS-SCM SCM Bench Test Configuration Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  8. THEMIS-SCM MAGNETIC CALIBRATION STATION – CHAMBON LA FORET Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  9. THEMIS-SCM • I&T AND SPACECRAFT INTEGRATION PLAN • Pre-intégration SCM – IDPU (DFB) • Integration to the spacecraft Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  10. THEMIS-SCM I&T AND SPACECRAFT INTEGRATION PLAN • Pre-Integration with IDPU • An « Interface Model » of the Pre-Amp will be provided for that purpose • Same Power, Command, analog output interfaces • Power and Cal Mode identification by led • Cal Signal re-injected to the input • A signal generator can be connected to each input • Validation can only be done by analysis of the telemetry data (tbd) Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  11. THEMIS-SCM I&T AND SPACECRAFT INTEGRATION PLAN • Integration in the spacecraft • Delivery (Incoming Inspection, Bench Test) • Mechanical Integration of the PA, connection to the boom harness • Sensor in the mu-metal box, connection to the boom harness • Electrical Integration (bounding, isolation, dangerous voltage) • Power ON and functionnal Test • Validation can only be done by analysis of the telemetry data (tbd) Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  12. THEMIS-SCM SCM – INTEGRATION IN THE SPACECRAFT Initial configuration The sensor is inside the mu-metal box, connected to the PA via the boom harness Requirement: to keep the sensor in the mu-metal box until all experiments are integrated in the spacecraft (mission operation test) Question: what is performed in UCB, and what is done in Swales ? Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  13. THEMIS-SCM SCM Mu-metal box Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  14. THEMIS-SCM SCM – INTEGRATION IN THE SPACECRAFT • WHAT CAN BE DONE WITH THE SENSOR IN THE MU-METAL BOX • axis identification • re-verification of the end-to-end calibration • Phase relation within the 3 components (for the waveforms) • check of the conducted noise • SCM/EField timing reference [and inter-calibration] (tbd) Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  15. THEMIS-SCM SCM – INTEGRATION IN THE SPACECRAFT • SENSOR MOUNTED ON THE BOOM • PA saturated by the 50/60 Hz • except in a quite site (i.e. Chambon), or in an EMC chamber • No measurement possible but a big failure would be seen • INSTALLATION OF THE MLI - by UCB when ? Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  16. THEMIS-SCM SCM – INTEGRATION – QUICK TESTS WITH HOUSEKEEPING • A few Housekeeping are needed to check the experiment rapidly (if possible in real time) during the ground tests and in the commissioning. • HOUSEKEEPING FOR SCM: • SCM-PWR-STATUS ( 1 bit ) • SCM-CAL-STATUS ( 1 bit ) • SCM-VOLT-MONITOR ( 8 bits ) • SCM-MEAN-VAL-BX, __BY, __BZ ( 16 or 8 bits ) • Mean average of |Bi| over one TM format (similar to r.m.s. value) Bertrand delaPorte THM-SCM-PDR – 2003.10.10

  17. THEMIS-SCM AC MAGNETIC NOISE VERIFICATION • In the low frequency range (< 4 kHz), the main sources of AC noise are • The beating within several higher frequencies, especially the DC/DC Converters if they are not synchronised. It can be conducted and/or radiated. • The solar pannels (cannot be verified on the ground) • The CETP can help to analyse the AC radiated noise around the spacecraft. A « magnetic sniffer » has been designed and built for that purpose. In order to avoid the saturation by the 50/60 Hz, the analysis is separated into two bandwidths: below 50 Hz and above 300 Hz (5th harmonic) Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  18. THEMIS-SCM SCM INTEGRATION – TEAM SUPPORT The SCM team will support all critical activities of the integrations. However, due to the large number of satellites, a strategy must be imagined to limit the number of travels, the cost and the time spent The EM integration will be supported The FM will be delivered 3 by 3 and the level of support for each test will be agreed with UCB Capability of remote supporting should be implemented Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  19. THEMIS-SCM EXAMPLE OF REAL TIME SUPPORT Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  20. THEMIS-SCM SCM SCHEDULE – KEY DATES Bertrand delaPorte THM-SCM-CDR – 2004.04.08

  21. THEMIS-SCM Bertrand delaPorte THM-SCM-CDR – 2004.04.08

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