GUEST LECTURE Luca MASSOTTI EUROPEAN SPACE AGENCY (ESA/ESTEC) Acronyms: AOCS: Attitude and Orbit Control System CMG: Control Moment Gyroscope ESA: European Space Agency EO: Earth Orbit EP: Electric Propulsion GOCE: Gravity field and steady-state Ocean Circulation Explorer GNSS: Global Navigation Satellite System ISS: International Space Station LEO: Low Earth Orbit LISA: Laser Interferometer Space Antenna NGGM: Next Generation Gravity Mission Topics: - Overview of ESA missions, with links to similar non-EU missions (3 hrs) - Sensors for Attitude and Orbital Control Systems (AOCS) (3 hrs) - Propulsion technologies (2 hrs) - Actuators for AOCS (3 hrs) - Gravity Missions: GOCE and MAGIC/NGGM (4 hrs) - Synergies in technology: commonalities between LISA and NGGM (2 hrs) - AOCS design of Earth Explorer LEO satellites (2 hrs) - Geostationary satellites with very high stability requirements (2 hrs) - Exercises and hands on specific space design problems (3 hrs) Part 1: introduction to space missions Overview of ESA missions, with a look at similar non-EU missions (3 hrs) ¿ Presentation of the course and of the speaker ¿ Basic principles of Remote Sensing for EO ¿ Overview of the ESA’s Earth Explorer program, the Sentinel program, the Meteorological program ¿ Non-EU programs ¿ Satellite trivia, Exploration, ISS and launchers EXE 1 (1 hr). General EO satellite design Part 2: Earth observation space missions design AOCS and sensors (3 hrs) ¿ Introduction to the satellite’s attitude and orbit control system (AOCS) ¿ Pointing requirements: analysis and formulation of the requirements ¿ Overview of the sensors for Earth Observation missions and their classification ¿ Inertial sensors (accelerometers and gyroscopes) ¿ Position/navigation sensors (GNSS) ¿ Attitude Sensors (Sun sensors, Earth sensors, star sensors, magnetometers) Actuators for space applications (3 hrs) ¿ Overview of the actuators for Earth Observation missions and their classification ¿ Linear momentum actuators (thrusters) ¿ Angular momentum actuators (momentum wheels, reaction wheels, CMG) ¿ Actuators making use of the planetary magnetic field (magnetic torque rods) Propulsion technologies (2 hrs) ¿ Overview of the propulsion technologies for space ¿ Thermodynamic/chemical thrusters ¿ Cold gas thrusters ¿ Electric propulsion (EP): overview of the technology developments and available products ¿ Examples of EP thrusters: the Indium mN-FEEP and the mini-RIT Gravity Missions: GOCE and MAGIC/NGGM (Next Generation Gravity Mission) (4 hrs) ¿ Objectives and criticalities ¿ Observables and related science products ¿ Brief overview of the gravity missions (EU and US missions) ¿ Measurement principles ¿ The GOCE mission: a close look at the satellite, mission profile and achievements ¿ NGGM: mission and (on-going) satellite design, mission profile, technology status and the NGGM international cooperation scenario EXE 2 (1 hr). Satellite sub/system design Synergies in technology: commonalities between LISA and NGGM (2 hrs) ¿ System and Payload: common elements and driving elements ¿ Actuators enabling both missions AOCS design of Earth Explorer LEO satellites (2 hrs) ¿ Typical observation scenarios for EO ¿ Platform classes and classification ¿ Examples of AOCS design for imager and SAR satellites (e.g. EE7 Biomass) Missions (telecom, weather forecast and security) in GEO orbits (2 hrs) ¿ Applications for telecom, weather forecast and security ¿ A challenging mission: GEO-HR (a geostationary satellite with very high stability requirements) ¿ Introduction to Image and Navigation Registration (INR) EXE 3 (1 hr). LEO/NGGM mission design

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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

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Presentazione report scritto

P.D.2-2 - Maggio

Thrursday 18/05 1000 to 1300 hrs Sala riunioni Shannon (3 hrs) Friday 26/05 1200 to 1400 hrs REMOTELY (2 hrs) Wednesday 31/05 1730 to 1830 hrs REMOTELY (1 hrs) Monday 05/06 0930 to 1330 hrs Sala riunioni Shannon (4 hours) Wednesday 07/06 1730 to 1830 hrs REMOTELY (1 hrs) Friday 09/06 1600 to 1800 hrs REMOTELY (2 hrs) Monday 19/06 1800 to 1900 hrs REMOTELY (1 hrs) Friday 23/06 1600 to 1800 hrs REMOTELY (2 hrs) Wednesday 28/06 1700 to 1900 hrs REMOTELY (2 hrs) Friday 30/06 0900 to 1600 hrs Sala riunioni Shannon (6 hours)