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 –

2. THEMIS-SCM SCM VERIFICATION – TEST MATRIX
I/f model EM
FM1 to FM6 PA SC
SC+PA
Electrical Verification X
Full Calibration
Thermal Test
Metrology (i/f, mass, CoG) (1)
Vibration QUALIF
Therm Vac QUALIF
Vibration ACCEPT
Pre-Integration IDPU
Integration in spacecraft
(1) : is the M.o.I. requested ?
Bertrand delaPorte
THM-SCM-CDR –

3. THEMIS-SCM I&T plans prior to delivery – SCM – SC (Sensor)
After winding of the internal tube
Impedance verification
done
After potting of the magnetic core
Magnetic flux response, with PA
After overall potting
soon
After 3 axis assembly, with associated PA
Transfer function, SC in mm-box
Metrology, Vibrations
Temperature limits
Full Calibration in Chambon
After delivery to UCB
Thermal vacuum (EM only ?)
Bertrand delaPorte
THM-SCM-CDR –

4. Electrical verification After cubes assembly and potting
THEMIS-SCM
I&T plans prior to delivery – SCM – PA 3D+ cubes
Single flex
Electrical verification
Offset adjustment
done
After cubes assembly and potting
Temperature test ( )
Bertrand delaPorte
THM-SCM-CDR –

5. THEMIS-SCM I&T plans prior to delivery – SCM – full PA
After PCB cabling
Electrical verification
soon
After assembly in the housing
Metrology, Vibrations
Full range Temperature Test
With associated SC
Transfer function, SC in mm-box
Full Calibration in Chambon
After delivery to UCB
Thermal vacuum (EM only ?)
Bertrand delaPorte
THM-SCM-CDR –

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 –

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

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

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

10. THEMIS-SCM Pre-Integration with IDPU
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 –

11. THEMIS-SCM Integration in the spacecraft
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 –

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 –

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

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 –

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 –

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 –

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 –

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 –

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

20. THEMIS-SCM SCM SCHEDULE – KEY DATES EM delivery to UCB for TV
31-May-2004
EM available for integration in UCB
11-Jun-2004
FM 3D cubes delivered to CETP
23-Jul-2004
FM-1,2,3 available (without TV)
24-Sep-2004
FM-4,5,6 available (without TV)
10-Nov-2004
Bertrand delaPorte
THM-SCM-CDR –

23. THEMIS-SCM
Bertrand delaPorte
THM-SCM-CDR –