PERIOD: The course will give an overview on space mission design devoted to Earth Observation (with a special focus on gravity missions), from scientific observables to AOCS design, technology design and qualification aspects, till mission architecture and implementation

Topics - Overview of ESA missions, with links to similar non-EU missions (3 hrs) - Gravity Missions: GOCE and NGGM (4 hrs) - Sensors for Attitude and Orbital Control Systems (AOCS) (3 hrs) - Propulsion technologies (2 hrs) - Actuators for AOCS (3 hrs) - A traditional case of AOCS design for LEO satellites (2 hrs) - Geostationary satellites with very high stability requirements (2 hrs) - A special case of AOCS design for flexible satellites: Biomass (2 hrs) - Exercises and hands on specific space design problems (3 hrs) Course organization Part 1: introduction to space missions Overview of ESA missions, with a look at similar non-EU missions (3 hrs) Ø Presentation of the course and of the speaker Ø Basic principles of Remote Sensing for EO Ø Overview of the ESA’s Earth Explorer program, the Sentinel program, the Meteorological program Ø Non-EU programs Ø Satellite trivia, Exploration, ISS and launchers EXE 1 (1 hr) Part 2: Earth observation space missions design Gravity Missions: GOCE and NGGM (Next Generation Gravity Mission) (4 hrs) Ø Objectives and criticalities Ø Observables and related science products Ø Brief overview of the gravity missions (EU and US missions) Ø Measurement principles Ø The GOCE mission: a close look at the satellite, mission profile and achievements Ø NGGM: mission and (on-going) satellite design, mission profile, technology status and the NGGM international cooperation scenario AOCS and sensors (3 hrs) Ø Introduction to the satellite’s attitude and orbit control system (AOCS) Ø Pointing requirements: analysis and formulation of the requirements Ø Overview of the sensors for Earth Observation missions and their classification Ø Inertial sensors (accelerometers and gyroscopes) Ø Position/navigation sensors (GNSS) Ø Attitude Sensors (Sun sensors, Earth sensors, star sensors, magnetometers) Actuators for space applications (3 hrs) Ø Overview of the actuators for Earth Observation missions and their classification Ø Linear momentum actuators (thrusters) Ø Angular momentum actuators (momentum wheels, reaction wheels, CMG) Ø Actuators making use of the planetary magnetic field (magnetic torque rods) Propulsion technologies (2 hrs) Ø Overview of the propulsion technologies for space Ø Thermodynamic/chemical thrusters Ø Cold gas thrusters Ø Electric propulsion (EP): overview of the technology developments and available products Ø Examples of EP thrusters: the Indium mN-FEEP and the mini-RIT EXE 2 (1 hr) Typical AOCS designs for LEO satellites (2 hrs) Ø Typical observation scenarios for EO Ø Platform classes and classification Ø Examples of AOCS design for imager and radar satellites Missions (telecom, weather forecast and security) in GEO orbits (2 hrs) Ø Applications for telecom, weather forecast and security Ø A challenging mission: GEO-HR (a geostationary satellite with very high stability requirements) Ø Introduction to Image and Navigation Registration (INR) A special case of AOCS design for flexible satellite: Biomass, the Earth Explorer 7 (2 hrs) Ø Objectives and scientific products Ø SAR payload Ø Mission and satellite design Ø Flexibility issues and impact on the mission design during Phases A/B1 EXE 3 (1 hr) People interested to attend the course can write an email to Prof. L. Massotti. Contacts: Luca.Massotti@esa.int, carlo.novara@polito.it

Monday 27/05 10:30 to 12:30 (2 hrs) Tuesday 28/05 09:30 to 13:30 (4 hrs) Wednesday 29/05 09:30 to 13:30 (4 hrs) Thursday 30/05 09:30 to 13:30 (4 hrs) Monday 03/06 10:30 to 12:30 (2 hrs) Tuesday 04/06 09:30 to 13:30 (4 hrs) Wednesday 05/06 09:30 to 13:30 (4 hrs) Tutte le lezioni verranno svolte nella “Shannon meeting room” - Main Campus - Corso Duca.

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Gli studenti e le studentesse con disabilità o con Disturbi Specifici di Apprendimento (DSA), oltre alla segnalazione tramite procedura informatizzata, sono invitati a comunicare anche direttamente al/la docente titolare dell'insegnamento, con un preavviso non inferiore ad una settimana dall'avvio della sessione d'esame, gli strumenti compensativi concordati con l'Unità Special Needs, al fine di permettere al/la docente la declinazione più idonea in riferimento alla specifica tipologia di esame.