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The ESEO mission: current
status and achievements
Nicola Melega1, Paolo Tortora1,2, Fabrizio Giulietti2,
Piero Galeone3, Antonio De Luca3
Davide Bruzzi ESEO Mission Implementation Manager
1 SITAEL S.p.A., 2University of Bologna, 3ESA-ESTEC
Outline
• The ESEO Program
• SITAEL S.p.A.
• ESEO in Brief
• Current status and achievements
– Launcher and orbit
– The ESEO spacecraft
– The ESEO spacecraft functional block diagram
– ESEO technology demonstrators
– ESEO AIV Plan
– ESEO Ground Segment
– Education activities
• Conclusions and future activities
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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The ESEO Program
• The ESEO Program is financed and
technically supported by the ESA
Education and Knowledge
Management Office reporting to the
Cabinet of the ESA Director General
(DGC-DE)
• The satellite is mainly developed by
students preparing their Master or
PhD thesis supported by ESA experts
• ECSS standards are considered as
reference documentation
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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SITAEL S.p.A.
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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• SITAEL S.p.A. belongs to the holding Angelo
Investments, a worldwide leading Transportation
and Aerospace Group composed by synergic
high-tech companies with more than 1000 highly
skilled employees.
• SITAEL, ALTA and ALMASpace, the three space
companies of Angelo Investments Group,
completed the process of merging into a single
company on December 31st, 2014.
• In the context of the ESEO Program,
ALMASpace is the prime contractor and
responsible for the mission implementation.
ESEO in brief - 1
• ESEO is the third mission managed by
the ESA’s Education and Knowledge
Management Office and builds upon
the experience gained with SSETI
Express (launched in 2005) and the
YES2 tether and re-entry capsule
experiment (launched in 2007);
• The project is currently at the end of
Phase C, the detailed design stage,
with students actively involved from
eight universities across all Europe;
• The ESEO spacecraft is to be launched
into Low Earth Orbit in 2016.
SSET
I Exp
ress
Y
ES2
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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ESEO in brief - 2
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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• ESEO Program Organization Chart:
ESEO in brief - 3
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Hungarian Academy of Sciences
Tritel Dosimeter (TRITEL)
University of Vigo
UHF Ground Station #2 (GSV)
Technical Univ. of Delft
ADCS S/W Experiment (ADE)
Cranfield University
De-Orbiting Mechanism (DOM)
AMSAT-UK
Educational HR Payload (AMSAT)
Technical Univ. of Munich
S-band Ground Station (GSM)
Wroclaw Univ. of Technology
S-Band TX (HSTX)
Budapest University
of Technology and Economics
Langmuir Probe (LMP) &
Power Distribution Unit (PDU)
University of Bologna
GPS Receiver, UHF Ground Station #1 (GSF)
Mission Control Centre (MCC)
Tartu Observatory
Optical Payload (CAM)
• ESEO University Network:
Launcher and Orbit - 1
• Launcher: VEGA is considered the baseline but
additional launchers are possible alternative candidates.
ESA is in the process to select a suitable launch vehicle.
• Orbit: The target is a circular Sun-Synchronous Orbit
(SSO), 10:30 LTAN with an altitude of 523 km.
• Attitude: Nadir-pointing attitude has been selected as a
baseline for nominal operations.
• Mission profile: The identified orbit produces a cycle of
106 orbits in a week, about 15 orbit per day, in order to
complete the coverage of the selected areas of interest
(Europe and South Atlantic Anomaly). The definition of
the areas of interest was driven by the optical payload
and the scientific instruments requirements.
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Launcher and Orbit - 2
• Coverage of the areas of interest:
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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The ESEO Spacecraft - 1
• The ESEO Platform: Platform subsystems and units are
installed inside the ESEO BUS Module
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Top Plate:
Telemetry and Telecommand (TMTC) AntennaGPS Payload Antenna
AMSAT Payload AntennaSun Sensor Main (SS)Sun Sensor Red (SS)
EGSE/Umbilical Connector
Tray 6:
Telemetry and Telecommand (TMTC)
Tray 5:
GPSMagnetometer Main (MM)Magnetometer Red (MM)Tray 4:
On-Board Data Handling (OBDH) Tray 3:
Power Distribution Unit (PDU)Power anagement Board (PMB)
Battery Packs (BP)
Tray 2:
Momentum Wheel Main (MWM)Momentum Wheel Red (MWR)
Magnetorquers Y (MT) Tray 1:
Micropropulsion System (MPS)Lateral Panels:
Solar Arrays (SA) Payload module:
Earth Sensor (ES)Micropropulsion System Pressure Vessel (MPV)
The ESEO Spacecraft - 2
• The ESEO Payload Complement: payloads provided by the
university network are installed inside the ESEO Payload Module.
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Top Plate:
GPS AntennaAMSAT Antenna
Tray 5:
GPS
Sector 4:
TRITELLMP LCB
Sector 2:
ESMT X & Z
Panel 2:
DOM
Bottom Plate:
LMP LDEES
HSTX AntennaTRITELCAM
Sector 3:
AMSATHSTX
HSTX Antenna
Sector 1:
MPS TankCAM
The ESEO Spacecraft functional block diagram
• ESEO Functional Block Diagram: fully redundant platform
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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ESEO technology demonstrators
• At platform level the following items are
implemented as in-orbit technological
demonstrators:
– In house developed cold-gas micro-propulsion
subsystem
– In house developed momentum wheel
– Integrated Current Limiter for power distribution unit
(ESA CFI)
– Integrated Single Event Latch-up protection for digital
devices (present in particular in OBDH and TMTC
subsystems)
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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ESEO AIV Plan
• The model philosophy foresees Elegant Breadboard
(EBB) and Proto-flight models (PFM)
• EBBs implemented with COTS components and going to
face qualification tests (including environmental)
• Confidence tests (VFT) are performed before CDR
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Confidence tests
• A set of electrical and functional confidence tests
(included in the VFT category) were agreed with
ESA and successfully completed
• The following verifications were performed: – Envelope and mass measurement, mechanical interface
check;
– Signals verification on electrical interfaces (power supply,
CAN, RS-232/RS-422/RS-485, pulse command, dedicated
data I/F);
– Power consumption measurement, including in-rush
current, ripple and DC-DC secondary output measurement
in idle and working conditions;
– Over-voltage protection circuit activation on secondary
power buses;
– Pulse command interface (inhibit, reset, re-programming
mode) verification.
• Tests have been repeated at -25°C and 70°C
• TID and SEE tests were performed on the
selected microcontroller
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Confidence tests on payloads EBB models
• DOM performed more than 20 successful
consecutive deployments after environmental
testing
• GPS successfully completed verification
functional test and interface check including a
specific test campaign at ESA-ESTEC
dedicated to the verification of the two
redundant front-ends
• TRITEL unit successfully completed electrical
and functional tests at ambient, minimum and
maximum temperatures
• HSTX completed several transmission tests in
order to verify data-rates, bandwidth and power
consumption at the different operational modes
• ADE completed algorithms coding, test on the
OBDH hardware representative model and
measurement of the performance
• AMSAT successfully completed electrical
verification and functional tests
10th IAA Symposium on Small Satellites for Earth Observation
April 20 - 24, 2015 Berlin, Germany 16
ESEO Ground Segment
• ESEO GS is composed by:
– Mission Control Center (including main telemetry and telecommand ground-
station, located in Forli (Italy)
– Telemetry and telecommand backup ground-station located in Vigo (Spain)
– S-band downlink ground-station for scientific data located in Munich (Germany)
• Additional components:
– SATNET network coordinated by CalPoly (USA)
– AMSAT community
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Backup TTC GS(Vigo)
TC Packets (UHF Band)
HK TM Packets (UHF band)TC Ack Packets (UHF band)
Payloads Planning
ESEO MCC
Primary TTC GS(Forli)
ESEO
TC Packets (UHF Band)
HK TM Packets (UHF band)TC Ack Packets (UHF band)
Payloads Ancilliary TM Packets (UHF band)Payload Data Reception GS
(Munich)
User Segment
Pass Planning (SATNET)
Science Data Downlink Report (SATNET)
Science Data file (SATNET)
Payloads Requests (FTP)
Payloads Request Status (FTP)Pass Planning (FTP)
Current activities on GS
• Consolidation of MCC interfaces, protocols
and data-rates
• Preparation of operational procedures
• Communication tests
• SATNET operational test campaign carried
out at the end of January 2015 to support
the LEOP phase in the context of the NASA
ELANA X launch.
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Backup TTC GS(Vigo)
Primary TTC GS(Forli)
ESEO
TC Packets(UHF Band)
HK TM Packets (UHF band)TC Ack Packets (UHF band)
Payloads Ancilliary TM Packets (UHF band)
Payload Data Reception GS(Munich)
Onboard Control Procedure
ESEOMission Control Center
Platform Engineer
ESEOMaintenance Center
(ALMASpace)
GS Operator
TLE Provider Site
User Segment
TC Packets (RF link)
HK TM Packets (RF link)TC Ack Packets (RF link)
Payload Ancilliary TM Packets (RF link)
TC Packets (UHF Band)
HK TM Packets (UHF band)TC Ack Packets (UHF band)
Payload Ancilliary TM Packets (UHF band)
TC Packets (SATNET)Operational Pass Planning (SATNET)
HK TM Packets (SATNET)TC Ack Packets (SATNET)
Payload Ancilliary TM Packets (SATNET)
Operational Pass Planning(SATNET)
TM Report Request(email)
TM Report (email)
Onboard Control Procedure(email)
Science Data DownlinkReport (SATNET)
Science Data file (SATNET)
ESEO TLE files(HTTPS)
Operational Pass Planning (FTP/SATNET)Payload Request Status Report (FTP)
TLE (FTP)
Payload Request (FTP)
Payloads Science TM packets (S band)
Educational activities
• Lecture and Training Courses, and
Internship opportunities were
organized and conducted at
system level at the UniBO and
System Prime premises for 60
students selected from the
University Network
• About 200 students are
collaborating to ESEO at different
levels of involvement, most of
them from the premises of all
university teams involved in the
project
• In January 2015 the last group of
ESEO students joined UniBO and
ALMASpace/SITAEL for their
internship period
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Conclusions and future activities
• The ESEO program is now at the end of phase C1, going to close
the CDR process with CDR board chaired by the ESA Inspector
General
• About 200 students have been actively involved in the ESEO
program, 60 of them participated in lecture and training courses as
well as a four weeks internship period at the prime contractor
premises
• Most of the spacecraft units and payloads have been successfully
manufactured and tested in their EBB models confirming the robust
design
• The program is now approaching an intense and challenging AIV
phase
• Follow the ESEO updates on:
http://www.esa.int/Education/European_Student_Earth_Orbiter
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Contacts
Davide Bruzzi
ESEO Mission Implementation
Manager [email protected]
SITAEL S.p.A. Via Filippo Guarini,13
47121 Forli (FC) - ITALY
Via San Sabino, 21
70042 Mola di Bari (BA) – ITALY
Tel: +39 080 5321796
Fax: +39 080 5355048
www.sitael.com
10th IAA Symposium on Small Satellites for Earth Observation April 20 - 24, 2015 Berlin, Germany
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Thank you for your kind attention