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ESA’s supporting Activities Related to Mass Transport in the Earth System

ESA’s supporting Activities Related to Mass Transport in the Earth System. Roger Haagmans Mission Science Division European Space Agency. Swarm mission: 3D-Mantle Conductivity (A. Jackson ETH Z ürich, DNSC, CUP) Swarm mission: gravity field potential

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ESA’s supporting Activities Related to Mass Transport in the Earth System

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  1. ESA’s supporting Activities Related to Mass Transport in the Earth System Roger Haagmans Mission Science Division European Space Agency

  2. Swarm mission: 3D-Mantle Conductivity (A. Jackson ETH Zürich, DNSC, CUP) • Swarm mission: gravity field potential (Christian Gerlach TUM and Pieter Visser DUT) • Studies related to future ideas

  3. Swarm Satellite & Constellation launch after 1.5 yr after 3 yrs after 4.5 yrs launch after 4.5 yearsred (C) 530 km 500 kmyellow (A,B) 470 km 300 km GPS Patch Antennas Accelerometer Magnetic package

  4. 3-D Electrical Conductivity of the Mantle • Time-varying external (inducing) magnetic fields produce induced electric currents in the conducting Earth • conductivity is sensitive to composition and temperature • These induced currents cause induced magnetic field variations

  5. 3-D Electrical Conductivity of the Mantle • Measured on ground or in space is the total (external + induced) magnetic field • Separation of external and induced fields enables determination of the electrical conductivity of the Earth’s interior • 3D-Conductivity: hours to months periods, corresponding to app. 100 - 1000 km depth • Study team led by Andy Jackson at ETH Zürich together with DNSC Copenhagen and CUP (Prague)

  6. Swarm mission: 3D-Mantle Conductivity (A. Jackson ETH Zürich, DNSC, CUP) • Swarm mission: gravity field potential (Christian Gerlach TUM and Pieter Visser DUT) • Studies related to future ideas

  7. Swarm and Gravity - Constellation Observation: GPS-baseline between satellites Geometry: GRACE A-B: along-track (KBR, scalar) Swarm A-B: cross-track (GPS, vector) Swarm A-C: ~ radial (GPS, vector)

  8. Gravity Field Gradients along-track cross-track radial

  9. SH-Error Characteristics from Gradients in x,y and z (1) along-track cross-track along + cross radial

  10. Simulation results: 1 Month A-B and A-C

  11. Swarm mission: 3D-Mantle Conductivity (A. Jackson ETH Zürich, DNSC, CUP) • Swarm mission: gravity field potential (Christian Gerlach TUM and Pieter Visser DUT) • Studies related to future ideas

  12. ESA studies: future gravity field concepts • Enabling Observation techniques for Future Solid Earth Missions.(2003) • Laser Doppler Interferometry Mission for Determination of the Earth’s gravity field. (2005) • Gravity Gradient sensor technology for future planetary missions.(2005) • Laser Interferometry High Precision Tracking for LEO. (2006) • Monitoring and Modelling Individual Sources of Mass Distribution and Transport in the Earth’s System by Means of Satellites(2007 18 months) Courtesy: Thales Alenia Space

  13. Measurement and control elements of the SSI mission

  14. Future Mission Concept Future Concepts? From: Ilk et al (2005)

  15. Study Team

  16. Study logic Mission design Gravity modelling Geophysical modelling Gravity retrieval Observability Separability

  17. Geophysical modelling Tides Oceans Atmosphere Ice Solid Earth Hydrology Simulated “real” world Consistent Compatible Complete Coupled Coordinated Dedicated Sufficient Realistic

  18. Current step: Gravity field modelling Geophysical model Earth Orbit Observable Constellation Input gravity Observed gravity along orbit + observation error

  19. Conclusions • Future Mission requires solid preparation: coordination with complementary measurement techniques from other future satellites (like SMOS, CryoSat, Sentinels e.g.) • Activities in ESA complement DFG efforts and try to learn from existing analysis to understand the needs for a future mission concept

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