Tandem-L-IGARSS-v2-final-2011.pdf

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Tandem-L-IGARSS-v2-final-2011.pdf

  1. 1. Tandem-L: A Mission Proposal for Monitoring Dynamic Earth ProcessesA. Moreira, G. Krieger, M. Younis, I. Hajnsek , K. Papathanassiou, M. Eineder, P. Dekker, F. De Zan German Aerospace Center (DLR)
  2. 2. Dynamic Processes on the Earth Surface Deforestation, Degradation, Fires* (REDD) Forest Biomasse Change* Biodiversity Earthquakes Volcanic Activities Land Slides Sea Ice Extent* Permafrost* Glacier & Ice Cap Dynamics* Soil Moisture* Flooding *) Essential Climate Ocean Currents* Variables
  3. 3. Carbon Balance and Vegetation The terrestrial carbon is the greatest unknown in the carbon cycle 6.4 ± 0.4 3.2 ± 0.1 Sources 1.6 ± 1.1 Unknown =Σ Ocean terrestrial sink sink Carbon Fossil Land use accumulation in fuels change Sink the atmosphere 2.2 ± 0.4 2.6 ± 1.7 Numbers in Billions of Tons – Carbon / Year (IPCC)
  4. 4. Forest and Carbon Biomass and the spatial distribution of carbon (50% of the biomass is Carbon) Global biomass distribution and its dynamic are widely unknown! Amazon basin … the estimation ranges from 39 to 93 GtC
  5. 5. 3-D Structure Mode Polarimetric SARPolarimetric Backscattering Interferometry (Pol-InSAR) 3-D Forest StructureForest height and Biomass Tomography
  6. 6. Forest Height Estimation (3D Structure Mode) Pol-InSAR Forest Height [m] Forest Height (in Situ) [m]
  7. 7. Traunstein Test Site Forest type Temperate Topography Moderate slopes 2003 Oct. Height 25 ~ 35m Species N. Spruce, E. Beech, White Fir Biomass 40 ~ 450 t/ha 50 40 30 20 10 HV Amplitude Image Pol-InSAR Forest Height Elevation Model 0m
  8. 8. Traunstein Test Site 2003 Oct. 2008 June 50 40 30 20 10 0m
  9. 9. Biomass Estimation from CombinationHeight + Structure of Multiple Single-Pass Profile Decomposition Interferograms (Series Expansion) f (z) pass 1 Example (Testsite Bayerischer Wald) pass 2
  10. 10. Structure - Biomass Allometry H 3 B = 3.11  a P i =0 j =1 j j a1 a2 a3Nationalpark Bayrischer Wald Ebersberger Forst Bürgerwald Traunstein Three Legendre polynomials explain the 92% of the total biomass !!! VU 10 > Autor Name
  11. 11. Dynamic Processes on the Earth Surface Deforestation, Degradation, Fires* (REDD) Forest Biomasse Change* Biodiversity Earthquakes Volcanic Activities Land Slides Sea Ice Extent* Permafrost* Glacier & Ice Cap Dynamics* Soil Moisture* Flooding *) Essential Climate Ocean Currents* Variables
  12. 12. Deformation Mode   measurement of Earthquakes deformations of mm – cm Volcanoes  λ/2 ≈ 12 cm Subsidence Land & Sea Ice systematic multi-temporal acquisitions (image stacks)
  13. 13. Cryosphere: Ice Motion and Topography of GlaciersICESAT GRACE 15 km track- > 200 kmdistance at equator spatial resolutionCryoSAT-2 TanDEM-X 15 km x 250 m 1 year for global spatial resolution coverage Tandem-L Tandem-L provides unique & complementary information: • 3D Ice flow 3 – 10 m resolution weekly coverage • Ice Structure • DEM • weekly coverage, high resolution Courtesy: Ian Joughin
  14. 14. Hydrosphere: Soil Moisture SMOS SMAP 50 40 3035 km resolution 10-40 km resolution 20 10 Tandem-L Tandem-L provides unique & 0 complementary information: 3 – 10 m resolution [vol.%] weekly coverage • soil moisture • water level changes • river & ocean currents • weekly coverage & high resolution
  15. 15. Mission Concept
  16. 16. Radar System Concepts …at start of DLR/JPL collaborationPlanar Array with Digital Beamforming Reflector with Analog Beamforming
  17. 17. Digital Beamforming with Reflector Antennas digital feed array with T/R modules
  18. 18. Digital Beamforming with Reflector Antennas digital feed array with T/R modules
  19. 19. Digital Beamforming with Reflector Antennas 
  20. 20. Tandem-L Science Products Resolution Revisit Forest height 16 days - Biosphere Above ground biomass 20 - 50 m seasonal Vertical forest structure Plate tectonics Geo-/ Volcanoes 5 - 100 m weeklyLithosphere Landslides Deformation Glacier flow weekly Soil moisture weekly on Cryo- & Water level change 50 - 500 m demandHydrosphere Snow water equivalent seasonal Ice structure Change seasonal Ocean Currents weekly Global Digital Terrain and surface model 20 - 50 m yearly
  21. 21. Dynamic Earth Monitoring and Climate Change Tandem-L: A proposal for a radar mission for environmental and climate change research

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