119 October 2010Flygteknik 2010 - SGEO designing, testing, launching and operating air and space systems

119 October 2010 Flygteknik 2010 - SGEO

designing, testing, launching and operatingair and space systems

Small GEO

A unique small telecom satellite with major Swedish contributions

Flygteknik 2010 - 19 October 2010

Mats [email protected]


Contents

• Programme

• Industrial set-up

• Schedule

• SGEO Overview

• SSC contributions

• Swedish participation

• Future missions


Programme

• ESA Programme – ARTES-11• Objective:

• 3 Sub-elements– Platform– First mission – Hispasat Advanced Generation 1 (AG1)– Product Line development

To develop a European cost-effective platform to address the segment of small telecommunications satellites in

geostationary orbit of less than 300 kg of payload mass, 3 kW of payload power and a lifetime of up to 15 years.

To develop and launch a small satellite allowing in-orbit validation of the platform and associated new

technologies.


Industrial consortium


Schedule

• Phase C/D started in 2008• PFM Accommodation Freeze this week• STM & EM campaign to start early 2011• Platform & Mission CDR – July 2011• QAR-1 (Platform ready) – April 2012• QAR-2 (Satellite ready) – April 2013• Launch – June 2013


SGEO Overview

• P/L configuration: 300 kg/3 kW

• Platform design for several launcher possibilities, including secondary passenger

• ITAR-free

• Platform flexible and modular to accommodate future users

• Establish qualification heritage for all components

• GTO with Apogee Engine Module in first mission

• Direct Injection with EP only supported in platform design


SSC contributions

• AOCS– Procurement of AOCS Sensors and Actuator

• Gyro (Honeywell/SAGEM)• Reaction Wheels (Rockwell Collins Deutschland)• Star Tracker (Jena Optronics)• Sun Sensors (Bradford Engineering/TNO)

– Development of AOCS Software

• EPPS– Procurement of EP components

• EP Thrusters (Snecma/ETCA)• Propellant Thruster Assembly (IberEspacio/CRISA)• Xenon Tanks (MT Aeronautics)• Cold Gas Thruster Assembly (TAS-I)

– EPPS Tubing

• Mission Analysis– Perform all Mission Analysis activities related to all AOCS and EPPS operations.


SSC Contributions - AOCS

(Jena-Optronik)(Rockwell Collins Deutschland)

(Bradford Engineering)

Reaction Wheel

Sun Sensor

Star Tracker


SSC Contributions – AOCS S/W

• Major element of Satellite S/W. Includes FDIR functionality• Agile S/W development methodology used, together with Test-

driven design• Software split up in scenarios, based on experience from Prisma

and Smart-1• Each scenario adds functionality to AOC Core S/W• Incremental delivery provided to OHB for system-level integration• S/W tested on SSC-developed simulators• S/W validated on system-level simulator provided by OHB• Independent S/W validation included in programme scope• S/W developed in Matlab and Simulink• Auto generated C-code provided as flight S/W


SSC Contributions - EPPS

• Continue the heritage from SMART-1• Implement full EP system• EP-only for all station-keeping manoeuvres• Flight demonstration of new EP Thruster technology

– HEMPT – High Efficiency Multi Stage Plasma Thruster– First mission will have 4 Hall Effect Thrusters (HET) as well

• SPT-100 thrusters from Fakel– HEMPT development not completed on time –> 4 additional HET

• EPPS Titanium Tubing• Sputtering Analysis


SGEO EPPS architecture


EP Thruster Bracket


Xenon Tank Assembly

• SGEO equipped with two Xenon Tanks

• Each tank is 60 litres, holding 110 kg of Xenon at 186 bar MEOP

• Equipped with dual ports to allow efficient xenon loading

• Xenon Loading Cart procured by SSC to enable loading of tanks prior to shipment to launch site.


SSC Contributions – EP Tubing


SSC Contribution – Mission Analysis

• Define the EP Flight Operations Plan• Station Keeping with collocation strategy• Optimum Station Keeping scenario must be established to minimize

propellant consumption during 15 years lifetime, including control of inclination and longitudinal drift together with angular momentum

• Collocation Strategy– First mission to be collocated with 4 existing satellites with CP

only.– Challenge to demonstrate how to enter and maintain position– Substantial simulations necessary to demonstrate behaviour at

possible failure of EP thrusters


Swedish contributions - SMU

• The Satellite Management Unit (SMU) is provided by RUAG Space AB in Göteborg.

• Provides all the typical satellite functionalities, including dedicated interfaces for AOCS and propulsion systems.

• Fully redundant• Processing is handled by a LEON2

processor (SPARC V8) providing up to 45 MIPS, 6 Mbytes EDAC protected SRAM and 4Mbytes EEPROM. The Mass memory has a storage capacity of 2 x 4 Gbit.

• Breadboard and EQM delivered. Testing of flight will start end 2010.

• RUAG Space AB also provides Ku-band and Ka-band converters.


Swedish contributions – Central tube

• The Central Tube is provided by RUAG Space AB – Linköping

• 55 kg, almost 3 meters long and 1.2 meters in diameter

• Sandwich structure made of Carbon Fibre Reinforced Plastic with an aluminium core.

• Complex manufacturing process, requiring precision and care, controlled by x-ray and airborne ultrasonic.

• Almost all development tests are completed, and the manufacturing of the structural and thermal model for the Small GEO central tube will be completed shortly. (R

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Future missions for SGEO

• European Data Relay Satellite – EDRS– ARTES-7 programme– Data relay for LEO satellites – Sentinel/GMES– ITT for phase C/D/E issued to potential EDRS operators– Dedicated satellite to be based on SGEO platform– CP only – AOCS S/W to be updated

• Heinrich Hertz– German national program– Objective: Technology verification and qualification of various innovative

technologies over an operation time of 15 years in the geostationary orbit.

• Meteosat Third Generation– Platform based on SGEO

• Commercial Customers



Technical support

SSCAOCS – Anders Mörtsell – [email protected]

AOCS S/W – Camille Chasset – [email protected]

EPPS – Alain Demairé – [email protected]

Mission Analysis – Anders Edfors – [email protected]

RUAGDHS – Peter Sindander – [email protected]

Central Tube – Isabelle Darmanin – [email protected]

mailto:[email protected]







Conclusions

• SSC heavily involved in the development of a new European satellite platform

• Partnership with OHB, 3rd Prime in Europe. Opens up possibilities for additional cooperation outside the SGEO frame

• SGEO part of the core business at the Space Division of SSC

• SGEO should be a significant part of Swedish space industry in the years 2020-2040


Excuse me Sir, I wonder…

Documents

119 October 2010Flygteknik 2010 - SGEO designing, testing, launching and operating air and space systems