IAA-B10-0703

Transcription

IAA-B10-0703

Davide Bruzzi
The ESEO mission: current
status and achievements
ESEO Mission Implementation Manager
Nicola Melega1, Paolo Tortora1,2, Fabrizio Giulietti2,
Piero Galeone3, Antonio De Luca3
1 SITAEL
S.p.A., 2University of Bologna, 3ESA-ESTEC
Outline
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The ESEO Program
SITAEL S.p.A.
ESEO in Brief
Current status and achievements
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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
2
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
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SITAEL S.p.A.
• 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.
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ESEO in brief - 1
SSETI Express
• 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);
YES2
• 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.
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ESEO in brief - 2
• ESEO Program Organization Chart:
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ESEO in brief - 3
• ESEO University Network:
University of Bologna
GPS Receiver, UHF Ground Station #1 (GSF)
Mission Control Centre (MCC)
Hungarian Academy of Sciences
Tritel Dosimeter (TRITEL)
Wroclaw Univ. of Technology
S-Band TX (HSTX)
Budapest University
of Technology and Economics
Langmuir Probe (LMP) &
Power Distribution Unit (PDU)
AMSAT-UK
Educational HR Payload (AMSAT)
Technical Univ. of Munich
S-band Ground Station (GSM)
University of Vigo
UHF Ground Station #2 (GSV)
Cranfield University
De-Orbiting Mechanism (DOM)
Tartu Observatory
Optical Payload (CAM)
Technical Univ. of Delft
ADCS S/W Experiment (ADE)
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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.
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Launcher and Orbit - 2
• Coverage of the areas of interest:
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The ESEO Spacecraft - 1
• The ESEO Platform: Platform subsystems and units are
installed inside the ESEO BUS Module
Top Plate:
Tray 6:
Telemetry and Telecommand (TMTC) Antenna
GPS Payload Antenna
AMSAT Payload Antenna
Sun Sensor Main (SS)
Sun Sensor Red (SS)
EGSE/Umbilical Connector
Telemetry and Telecommand (TMTC)
Tray 5:
GPS
Magnetometer Main (MM)
Magnetometer Red (MM)
Tray 4:
On-Board Data Handling (OBDH)
Tray 3:
Tray 2:
Power Distribution Unit (PDU)
Power anagement Board (PMB)
Battery Packs (BP)
Momentum Wheel Main (MWM)
Momentum Wheel Red (MWR)
Magnetorquers Y (MT)
Tray 1:
Lateral Panels:
Micropropulsion System (MPS)
Solar Arrays (SA)
Payload module:
Earth Sensor (ES)
Micropropulsion System Pressure Vessel (MPV)
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The ESEO Spacecraft - 2
• The ESEO Payload Complement: payloads provided by the
university network are installed inside the ESEO Payload Module.
Top Plate:
GPS Antenna
AMSAT Antenna
Tray 5:
GPS
Sector 4:
TRITEL
LMP LCB
Sector 1:
MPS Tank
CAM
Sector 2:
ES
MT X & Z
Panel 2:
DOM
Sector 3:
AMSAT
HSTX
HSTX Antenna
Bottom Plate:
LMP LDE
ES
HSTX Antenna
TRITEL
CAM
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The ESEO Spacecraft functional block diagram
• ESEO Functional Block Diagram: fully redundant platform
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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)
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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
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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:
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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
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Confidence tests on payloads EBB models
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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
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ESEO Ground Segment
• ESEO GS is composed by:
– Mission Control Center (including main telemetry and telecommand groundstation, 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
TC Packets (UHF Band)
ESEO
HK TM Packets (UHF band)
TC Ack Packets (UHF band)
Payloads Ancilliary TM Packets (UHF band)
Payload Data Reception GS
(Munich)
Pass Planning (SATNET)
Backup TTC GS
(Vigo)
Primary TTC GS
(Forli)
Science Data Downlink
Report (SATNET)
Science Data file (SATNET)
User Segment
ESEO MCC
Payloads Request Status (FTP)
Pass Planning (FTP)
Payloads
Planning
Payloads Requests (FTP)
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Current activities on GS
• Consolidation of MCC interfaces, protocols
and data-rates
• Preparation of operational procedures
• Communication tests
ESEO
TC Packets
(UHF Band)
Payload Ancilliary TM Packets (UHF band)
Payloads Ancilliary TM Packets (UHF band)
Payloads Science
TM packets (S band)
TC Packets (SATNET)
Operational Pass Planning (SATNET)
Primary TTC GS
(Forli)
HK TM Packets (RF link)
Backup TTC GS
(Vigo)
TC Ack Packets (RF link)
Payload Ancilliary TM Packets (RF link)
Operational Pass Planning (FTP/SATNET)
Payload Request Status Report (FTP)
TLE (FTP)
TC Packets (RF link)
HK TM Packets (SATNET)
TC Ack Packets (SATNET)
Payload Ancilliary TM Packets (SATNET)
ESEO
Mission Control Center
Operational Pass Planning
(SATNET)
Payload Request (FTP)
Science Data Downlink
Report (SATNET)
Science Data file (SATNET)
User Segment
Onboard Control
Procedure
TM Report Request
(email)
Payload Data Reception GS
(Munich)
ESEO TLE files
(HTTPS)
TM Report (email)
GS Operator
TLE Provider Site
Onboard Control Procedure
(email)
Platform Engineer
• 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.
ESEO
Maintenance Center
(ALMASpace)
18
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
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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
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Contacts
Thank you for your kind attention
Davide Bruzzi
ESEO Mission Implementation
Manager
davide.bruzzi@sitael.com
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
21

IAA-B10-0703

Transcription

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