TanDEM-X is a satellite mission to generate a global digital elevation model. The document provides an overview of the TanDEM-X mission status and scientific contributions since its launch in June 2010. It describes the mission objectives to generate DEMs, measure surface velocities, and demonstrate new SAR techniques. The commissioning phase involves calibration and testing of the interferometric modes in monostatic and bistatic configurations. Initial data takes show successful interferometry and polarimetric SAR imaging capabilities. The document outlines the data acquisition plan and opportunities for scientific proposals and experimental products.

1. TanDEM-X: Mission Status & Scientific Contribution Irena Hajnsek 1/2 , Gerhard Krieger 1 , Kostas Papathanassiou 1 , Stefan Baumgartner 1 , Marc Rodriguez-Cassola 1 , Pau Prats 1, Maria Sanjuan Ferrer 1 , Florian Kugler 1 & TanDEM-X Team 1 Microwaves and Radar Institute & ²Institute of Environmental Engineering, ETH Zurich

2. TanDEM-X: TerraSAR-X-Add-on for Digital Elevation Measurements Launch: 21.June 2010 (38 days ago) from Baikonor (first signal arrived after 15min from the ground station Troll in the Antarctic)

3. Standards for Digital Elevation Models (DEM) SRTM / X-SAR SRTM (DTED-1) TerraSAR-X (TanDEM-X ~ HDEM) TanDEM-X Simulation Primary Mission Objectives

6. General Outline of the Data Acquisition Plan 1 global DEM acquisition with small baselines + acquisition of scientific radar data products 1 global DEM acquisition with scaled (larger) baselines + acquisition of scientific radar data products Commissioning Phase DEM data takes for difficult terrain with different viewing geometry + radar data products radar data products and customized DEMs with large interferometric baselines t 1 year 1 year 6 months ≥ 3 months 5 months Nominal Data Acqusition 3 (+?) Years

8. First TanDEM-X Images (3 days & 14 hours after TDX launch) Madagaskar Stripmap 24.06. 2010 14:55:44 (DT 11) R: standard deviation G: amplitude B: scaled difference Published on http://www.dlr.de/

9. TanDEM-X / TerraSAR-X – First TSX Image 2007 vs. 2010 TSX 2007 TDX 2010 Don region (100 km northwest of Volvograd)

10. „ Blind Overlay“ – First TSX Image 2007 vs. TDX Image 2010 R: TSX 2007 G: difference B: TDX 2010

11. TanDEM-X / TerraSAR-X – First TSX Image 2007 vs. 2010 Train 2007 (15:03 UTC) Train 2010 (14:53 UTC) R: TSX 2007 G: difference B: TDX 2010

12. Phase Single Pass X-band Interferomgram (16 June 2010: 25km along track & approx. 300m across track baseline)

13. Digital Elevation Model (approx 200m height difference)

14. First Pol-InSAR Data Takes Dual-Pol HH-VV Spotlight Test Site Location: Russia InSAR Mode: Monostatic Temporal Baseline: 3sec Spatial Baseline ( ┴ ): 275m

15. Pol-InSAR HH-HH VV-VV HH VV Interferometric Coherence Amplitude Images

16. Pol-InSAR Interferometric Coherence: at polarisation Coherence Region: Max. Phase diff. between polarisations

17. Pol-InSAR 0 1 2 [m] 3

18. Pol-InSAR Dual-Pol HH-VV Spotlight Test Site: Papua N. Guinea InSAR Mode: Monostatic Temporal Baseline: 3sec Spatial Baseline ( ┴ ): 185m

19. Pol-InSAR HH-HH VV-VV HH VV Interferometric Coherence Amplitude Images

20. Pol-InSAR 0 2 6 [m] 8

21. Pol-InSAR Dual-Pol HH-VV Spotlight Test Site: Sahara InSAR Mode: Monostatic Temporal Baseline: 3sec Spatial Baseline ( ┴ ): 230m

22. Pol-InSAR 0 1 2 3 4 [m] 5

23. TanDEM-X Scientific Experiments: Topic‘s ~3s time lag suitable for short term temporal decorrelation studies Pursuit Monostatic Along-track baseline: 20 km Temporal Decorrelation Analysis Only possibility to investigate very long baseline GMTI Velocity Measurements Investigation of high resolution processing (azimuth) Superresolution First long baseline bistatic imaging Bistatic Experiment Potential of X-band for short volume characterisation Bistatic Phase Across-track baseline: 500 m Polarimetric SAR Interferometry Assessment of the interferometric phase Double differential SAR Interferometry Bistatic processing performance Bistatic Processing Comments CP Phase TDX Experiments

24. TanDEM-X Proposal Submission Open for Experimental Products Please have a look @ http://tandemx-science.dlr.de

25. Operational Mode Products Two standard TerraSAR-X level 1b products* (including geocoding) for all acquisitions Non Standard TerraSAR-X level 1 products* (including geocoding) of the monostatic channel for all acquisitions Experimental products generated by the TerraSAR-X processor CoSSC (coregistered slant range single look complex) for Stripmap and single polarisation Two CoSSC (coregistered slant range single look complex) for all acquisitions CoSSC (coregistered slant range single look complex) and interferograms for all acquisitions Experimental products generated from the TanDEM-X processor Processing and Products Any < 1 km < 1 km Along-track baseline < 4 km < 4 km < 4 km Across-track baseline Formation Geometry all basic polarisation modes (incl. DRA mode for quad polarimetry) Single all basic polarisation modes (incl. DRA mode for quad polarimetry) Polarisation mode all basic modes Stripmap Stripmap Imaging mode Pursuit Monostatic Alternating Bistatic Bistatic TanDEM-X cooperative mode Commanding Operational Mode

26. TanDEM-X BLOG: http://www.dlr.de

27. Thanks for your attention TanDEM-X Team