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The Design of GGOS in 2020 (Chapter 9) Markus Rothacher and many other co-authors GGOS Forum

GG S 2020. The Design of GGOS in 2020 (Chapter 9) Markus Rothacher and many other co-authors GGOS Forum EGU General Assembly 2007 April 17, 2007, Vienna. Measuring and Modeling the Earth‘s System. Measuring. Information about Earth System. Geometry Station Position/Motion,

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The Design of GGOS in 2020 (Chapter 9) Markus Rothacher and many other co-authors GGOS Forum

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  1. GG S 2020 The Design of GGOS in 2020 (Chapter 9) Markus Rothacher and many other co-authors GGOS Forum EGU General Assembly 2007 April 17, 2007, Vienna

  2. Measuring and Modeling the Earth‘s System Measuring Information about Earth System Geometry Station Position/Motion, Sea Level Change, Deformation Space Geodetic Techniques VLBI SLR/LLR GNSS DORIS Altimetry InSAR Gravity Missions Terrestrial Techniques Levelling Abs./Rel. Gravimetry Tide Gauges Air-/Shipborne Earth System Sun/Moon (Planets) Atmosphere Ocean Hydrosphere Cryosphere Core Mantle Crust I N T E R A C T I O N S C OM B I N A T I O N Earth Rotation Precession/Nutation, Polar Motion, UT1, LOD Gravity Geocenter Gravity field, Temporal variations Observation Modelling Influence / Modelling

  3. Global Networks of Observing Stations Data Analysis Centers GGOS Portal Access to all information, data, products Combination Centers Earth Observation Satellites / Planetary Missions Modeling Centers Structure of GGOS 2020 (Technical Part) Coordination through IAG Services Analysis, Combination, Modeling Coordination Center(s) (IAG Services) Quality Assurance Regional and Global Data and Product Centers Archiving and Dissemination Mission-specific Data and Product Centers Archiving and Dissemination Users Science & Society Satellite/Planetary Mission Coordination Centers Real data; information Meta data; information

  4. Integration of 5 Levels into a GGOS 5 Level 4 Moon,Planets Planets Moon

  5. Individual Networks: Station networks of VLBI, SLR/LLR, GNSS, DORIS Permanent absolute and superconducting gravimeters; tide gauges Air-borne, ship-borne data aquisition RT data transfer; new communication technologies for remote areas ~30-40 Fundamental Stations: Co-location of several techniques; 1 mm local tie measured, additional sensors (meteo, WVR, ultra-stable oscillators, gravimeters, seismometer, tiltmeters, …), highly automated, 24 hours a day / 7 days a week Latest technologies: GNSS: all GNSS, 50 Hz real-time data, 3 receivers/antennas, … SLR: kHz, fast telescopes, two colors, transponders on Moon/planets VLBI: continuous obs., new/multiple telescopes, real-time, obs. of (GNSS) satellites, space VLBI, … Densification with GNSS stations: ~ 1000 GNSS stations, stable monuments Ground-Based Infrastructure

  6. LEOs Missions Relevant to GGOS Already existing missions and funded future missions:

  7. Satellite Missions: Continuous observations over decades, long time series (trends) Chains of satellite missions (altimetry, gravity, InSAR, …) Constellations of satellites (COSMIC, SWARM, …), micro- and nano-satellites Formation flying: several satellites forming “one large instrument” Near real-time data transfer (inter-satellite comm.) and analysis (early warning systems) Development of new sensors and technologies (e.g., GNSS reflectometry and scatterometry, laser interferometry between satellites, ultra-stable oscillators in space) Satellites allowing co-location of space geodetic techniques (GNSS receiver , SLR retroreflector, VLBI emitter, gradiometer; SLR on GNSS satellites, VLBI in space, transponders on planets, …) LEO Satellite Missions

  8. Processing and Analysis: Fully automated processing in near real-time or even in real-time (early warning systems, GNSS seismology, atmosphere sounding, …) Full reprocessing capabilities for all data available, long consistent time series for long-term trends Combination of all data types on the observation level Combination with LEO data (co-location, gravity, geocenter, atmosphere, …) Combination with satellite altimetry data (and with InSAR ?) Combination with terrestrial data (e.g. gravity field, …) Combination of different analysis centers (redundancy, reliability, accuracy, …) Improvements in modeling, parameterization, conventions Supercomputers, visualization Processing, Analysis, Combination

  9. GGOS: Future Combination Space Parameter space for a rigorous combination: Parameter Type VLBI GPS/ DORIS/ SLR LLR Alti- GLON. PRARE metry ICRF Quasar Coord. (ICRF) X (X) (X) Nutation X X Earth Rotation Polar Motion X X X X X UT1 X X X X X Length of Day (LOD) X X X X X (X) Coord.+Veloc.(ITRF) ITRF Geocenter X X X X Gravity Field X X X (X) X Orbits X X X X X Gravity Field LEO Orbits X X X X Ionosphere X X X X Atmosphere Troposphere X X X X Time/Freq.; Clocks (X) X (X)

  10. 4D Models of the Earth System Interactions modified from H. Schuh Tides of the solid Earth Global vegetation Lunisolar Gravitational acceleration Oceanic tides Ocean currents Global ground water Density variations in the atmosphere Snow Ocean loading Atmospheric tides Deformation of the Earth Postglacial land uplift Angular torques Atmospheric loading … Angular momentum variation of the oceans Tectonic plate motion Angular momentum variation of the atmosphere Volcanism Pole tides Earthquakes Orientation of the Earth Precession,Nutation Polar motion Length of day Gravity Field of the Earth Effects from Earth interior

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