EPFL CubeSats and future missions - Muriel Richard-Noca Workshop Paris Diderot 9 June 2016 - IGOSat
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EPFL CubeSats and
future missions
Muriel Richard-Noca
Workshop Paris Diderot
9 June 2016
muriel.richard@epfl.ch
6 years ago (Sept 23, 2009), EPFL and partners
launched the first Swiss student satellite… SwissCube…
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SwissCube launch at 720 km altitude, 23-09-09
Logo
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ITUpSAT-1 SwissCube 3
SwissCube keys to success…
• # 1: a good SE team and continuity
• # 2: Clear and prioritized list of mission objectives
• # 3: Plan for regular reviews with CubeSat, industry and
ESA/CNES experts
• # 4: Descoping is OK, carry back-up options
• # 5: KISS but “clean” design
• # 6: Testing, testing, testing…
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Phase C tests
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Phase D tests
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First 2 years of ops in 1 slide
180 –
300 deg/s
Hard Reset – 20.01.2011
70 deg/s
Launch– 23.09.2009 1 deg/s
I2C degradation
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Example of flight data
30 40
SwissCube rotating fast
25 October 2009
30
EPS Temperatures, 25 November 2009
20
EXT_TP
FRAME_TP
20
10 BAT1_TP
BAT2_TP
Temperature (oC)
Temperature (oC)
10
PCB_TP
0 MB_TP
09:21 09:36 09:50 10:04 10:19 10:33 10:48 11:02 11:16
0
10:48 11:02 11:16 11:31 11:45 12:00 12:14 12:28 12:43
EXT_TP
-10
FRAME_TP
-10
XN_TP
XP_TP
-20 YN_TP
-20
YP_TP
ZN_TP
-30
ZP_TP
Time (hrs:min) Flight temperature data on -30
UTC Time (hrs:min)
50 50
40
swisscube.epfl.ch
Faces Temperatures, 17 June 2011
40
EXT_TP
BAT1_TP
FRAME_TP
BAT2_TP
EPS-COM-ADCS
Internal Temperatures, 17 June 2011
EXT_TP PCB_TP MB_TP
FRAME_TP COM_MC_TP COM_PCB_TP
30 XN_TP 30 COM_BEAC_TP ADCS_MM_TEMP
XP_TP ADCS_MSP_TEMP
YN_TP
20 20
YP_TP
Temperature (oC)
Temperature (oC)
ZN_TP
10 ZP_TP
10
0 0
10:04 10:33 11:02 11:31 12:00 12:28 12:57 13:26 10:04 10:33 11:02 11:31 12:00 12:28 12:57 13:26
-10 -10
-20 -20
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-30
UTC Time (hrs:min)
SwissCube stabilized -30
UTC Time (hrs:min)
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And this is what SwissCube saw since the first months
2010: 5 2011: 10 2012: 6 2013: 7 2014: 8
2015: 7 2016: 6
till now
US satellite
Communication M2M AIS
172 kg, operational at 720 km
CNES/NASA satellite
Clouds and aerosol studies
635 kg, operational at 705 km
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So what do you do?
• EPFL decided to take responsibility and created a
mission (CleanSpace One) to:
1. Increase the awareness and responsibility in regard to orbital
debris problem in the world, and educate aerospace students,
2. Develop and test the technologies required for a rendezvous
with an uncooperative object in space,
3. Bring SwissCube back!
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10CleanSpace One mission scenario
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11CleanSpace One microsatellite
• CleanSpace One microsat:
• Based on a CubeSat and COTS technologies for the most part
• Preliminary design done using CDF (but needs re-evaluation)
• Expect ~50 kg dry mass, < 80 W
• Mix of professional and student participation
• Open to international cooperation
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12CSO project schedule
Launch
2016 2017 2018 2019 2020 2021 2022
Phase E/F
Project Phase B – Prelimin. Phase C – Detailed – Ops and
Phase A - Feasibility Phase D – Production and tests
Preparations Definition Definition disposal
Mission & System Preliminary Critical Qual. & Flight
Requirements Design Design Acceptance
Review (MSRR) Review (PDR) Review (CDR) Review (QFAR)
Rendezvous sensors Test prototypes in CH robotics facility
Capture system Flight-test in International Space Station
Satellite platform Flat Sat Tests
Student led tests
Ground dev & observations Optical observations
Rendezvous sensors Test Eng. Model in space robotics facility
Capture system Test EQM Model in space robotics facility
Qual/
Satellite platform Eng. Models FM Production A&I
Accep tests
Com
Ground dev & observations Optical + Radio obvs tests
Mission Operations Capt.
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13And in the meantime: Rexus GGES (2010 – 2012)
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6/9/2016 14And then: CubETH (2012 - …)
• System engineering and several subsystems done at EPFL
• Global navigation receivers compatible with all constellations
• Over 90 students and counting
• Launch targeted 2017
Structure concept by ELSE SA
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15CubETH Key facts
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16And… CADRE: CubeSat ADR experiment (2014)
• Objective: Testing debris removal technologies using CubeSats
• ESA IOD mission
• Will demand the rendezvous of two spacecraft, launched together but then separated
• Is revamped in 3 smaller IOD missions
Chaser 8U CubeSat, ~ 16 kg, 70W peak
Target 4U CubeSat, ~ 4 kg, 15 W peak
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17CADRE mission and demonstration objectives
• Tests of Rendezvous sensors
• Testing of the rendezvous (close and far range) sensors
• Validation of on-board ranging algorithms
• Demonstration of motion reconstruction of an uncooperative
target using 2-D or 3-D vision-based motion reconstruction
algorithms
• Validation of the hand-over between relative and absolute
navigation
• Demonstration of close range operations.
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18CADRE Mission scenario
56 day mission
Motion reconstruction
Free drift/Hand-over
observations at SK1
4 times test of the absolute
3 different spins of target
to relative navigation
from 7 km down to 25 m
Launch to 550 km SSO
15 fly-around (15 orbits)
4 x 15 observations at 4 points in the fly-around
3 different spins of target
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19Never forget the essentials...
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20Questions?
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21SwissCube keys to success…
• # 1: a good SE team and continuity
SET Team
Muriel/Renato
Noemy Ted
Fabien Guillaume Muriel Hervé Benoit/Florian
PAYLOAD/ DATA/
ELECTRICAL MECHANICAL AI&V ADCS GS and FSW
MISSION OPERATIONS
Nicolas Steiner Gregoire Aubelle Lucas Oehen Martin
Mirsad.Sarajlic David Lengacher Jerome Champion
EPS/HEIG-VD Kill Switch/EPFL Mission Ops Ehrensperger
PAYL/HEIG_VD AI&V FSW/HE-ARC
EPFL ADCS SW/ETHZ
Garikoitz Omar Lahlou Amine
Jiri Holzbecher Gregoire Bourban Patrick Thevoz
Madinabeitia COM SE/EPFL
PAYL/EPFL Simulator/EPFL Sun Sensor/EPFL FSW/HE-ARC
ADS/EPFL
Rakesh Chandra
David Crettaz Yassir Madhour Sami Boukriba
Prajapati
CDMS/HEV Therm. Anal./EPFL Main RF/EPFL FSW/HE-ARC
Gyros/EPFL
Cédric Blondel Enrique Rivera Laurent Hauser
Anthony Servonet Thermal Test/EPFL Main RF/UniNe ADCS/EPFL GSW/HE-ARC
EPS/EPFL
????
Piotr Prati Lorenzo
Components Test/
PM req / EPFL Beacon/HEFR GSW/HE-ARC
EPFL
Jordan Djambazor Stempfel Nicolas
EGroupWare/EPFL Beacon/HEFR GSW/HE-ARC
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22SwissCube keys to success…
• # 1: a good SE team and continuity
• # 2: Clear and prioritized list of mission objectives
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23SwissCube keys to success…
• # 1: a good SE team and continuity
• # 2: Clear and prioritized list of mission objectives
• # 3: Plan for regular reviews with CubeSat, industry and
ESA/CNES experts
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24SwissCube keys to success…
• # 1: a good SE team and continuity
• # 2: Clear and prioritized list of mission objectives
• # 3: Plan for regular reviews with CubeSat, industry and
ESA/CNES experts
• # 4: Descoping is OK, carry back-up options
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25SwissCube keys to success…
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26SwissCube keys to success…
• # 1: a good SE team and continuity
• # 2: Clear and prioritized list of mission objectives
• # 3: Plan for regular reviews with CubeSat, industry and
ESA/CNES experts
• # 4: Descoping is OK, carry back-up options
• # 5: KISS but “clean” design
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27SwissCube keys to success…
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