1 / 16

Density and Winds Inferred from GOCE Accelerometer ( thrusters ) Data Sean Bruinsma

Density and Winds Inferred from GOCE Accelerometer ( thrusters ) Data Sean Bruinsma CNES, Toulouse Eelco Doornbos Delft University of Technology. Project information. ESA contract No. 4000102847/11/NL/EL with TU Delft Consortium: TU Delft - Management and production

sarila
Download Presentation

Density and Winds Inferred from GOCE Accelerometer ( thrusters ) Data Sean Bruinsma

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Density and Winds Inferred from GOCE Accelerometer (thrusters) Data Sean Bruinsma CNES, Toulouse EelcoDoornbos Delft University of Technology

  2. Project information ESA contract No. 4000102847/11/NL/EL with TU Delft Consortium: TU Delft - Management and production CNES - Product evaluation HTG - Non-gravitational force modeling http://thermosphere.tudelft.nl/goceplustheme3/ (nb: register first)

  3. GOCE: ESA’s first Earth Explorer Launch: 17 march2009 (Plesetsk) Mission objectives: Determinegeoidwith an accuracy of 2 cm and gravityanomalies with an accuracy of 1-2 mGal (1-2 10-5 m/s2) at a resolution of 100 km (degree 200) Mission orbit: Sun-synchronous (i=96.5°), dawn/dusk, 255 km altitude Payload: Gradiometer(accelerometers), GPS receiver, laser retroreflector Drag control: Ion thrusterscommanded in closed-loop

  4. GOCE: ESA’s first Earth Explorer

  5. GOCE mission in perspective

  6. GOCE mission in perspective

  7. GOCE mission in perspective

  8. GOCE: drag and solar radiation

  9. GOCE: drag and solar radiation

  10. GOCE natural decay & drag-free Natural decay (about 3 months, not shown) followed by drag-free flight starting 13 September 2009 at the mission altitude of 254.9 km (NB: the figure shows mean spherical altitude) Density inferred from accelerometer data Density inferred from thrusters+accelerometer data

  11. GOCE thrusters data

  12. GOCE thrusters data Thrust < 3mN: noise (red line=3-point average Thruster data sampling: 8 s

  13. Preliminary GOCE densities

  14. Preliminary GOCE densities

  15. Preliminary GOCE densities

  16. GOCE densities • To do: • Implement satellite model • Combine thrusters and accelerometer data • Compute densities and winds • Validate products • Poster in session SA10 at the AGU Fall Meeting

More Related