1. Demonstration of SAR Interferometry under Crossing Orbits using TerraSAR-X and TanDEM-X P aco López-Dekker , Pau Prats, Francesco De Zan, Steffen Wollstadt, Daniel Schulze, Gerhard Krieger and Alberto Moreira Microwaves and Radar Institute, German Aerospace Center (DLR)

4. TanDEM-X Commissioning Phase First bi-static DEM 8 October (MET +113) June‘10 July‘10 Aug‘10 Sep‘10 Oct‘10 Nov‘10 Dec‘10 Early Orbit Phase Grg Segment Checkout Bi-static Commissioning Phase 20 km Formation TDX Orbit Drift 16.000 km  20 km Close Helix-Formation 300-400 m Launch 21 June DEM Acquisition First SAR Image 24 June (MET +3.6) First DEM 16 July (MET +25) TDX Monostatic Comm. Phase 6 Months Commissioning Phase First close formation DEM 19 October (MET +124) First bi-static SAR image 8 August (MET +48)

6. TanDEM-X first DEM (October Revolution Island)

7. DEM Error/Performance High-pass filtered DEM Coherence to point-to-point error Scaling to restore white noise powe

9. Ronne #1 (lat/lon: -78°/-56.5°) Ronne #2 (lat/lon: -78.1°/ -48.2525°)

10. Acquisition Timeline Snow and ice precipitation (800km away) (28/06) High wind speeds (up to 50km/h, monthly mean 16km/h) (26/06)

12. Ronne #1, 300 MHz strip-map (experimental) 1st cycle 5d 1d 6d

13. 5d 1d 6d Ronne #1, 300 MHz strip-map (experimental) 2nd cycle

16. Velocity measurements on the Filchner/Ronne Ice Shelf (taken from http://nsidc.org) The velocity contours are from Vaughn and Jonas, 1996 (units of m/yr). (Vaughan, D.G., and M. Jonas, 1996. Measurements of velocity of Filchner-Ronne Ice Shelf. Filchner-Ronne Ice Shelf Programme (FRISP) Report No. 10. Ed. H Oerter. Pub. AWI, Bremerhaven. 111-116.)

17. Other things to do: exploit varying baseline Ronne #1 150 MHz strip-map (3rd cycle) 1 day repeat Homogeneous scene Rapidly varying baseline Rapidly varying kz