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Tomographic Profiling (TP): Vertical Backscatter Imaging for Biogeophysical Targets

Tomographic Profiling (TP) offers vertical backscatter profiles through various target volumes, including snow, ice, vegetation, and forestry. It provides a unique scheme for retrieving images at different constant incidence angles, enabling detailed analysis of biophysical structures. This innovative technique, presented with theoretical background and experimental examples, showcases its versatility in diverse applications. Experimental results from ground-based and laboratory setups highlight its potential, with future plans for airborne demonstrations. This method advances imaging capabilities, especially in resolution enhancement for C-band applications.

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Tomographic Profiling (TP): Vertical Backscatter Imaging for Biogeophysical Targets

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  1. Tomographic Profiling (TP) A Scheme for Vertical Backscatter Profiling of Biogeophysical Targets at Constant Incidence Angles Keith Morrison1& John Bennett2 1Department of Informatics & Systems Engineering, Cranfield University, Shrivenham, UK k.morrison@cranfield.ac.uk 2Department of Electronic & Electrical Engineering, Sheffield University, Sheffield S1 3JD, UK IGARSS 2011 Vancouver

  2. Tomographic Profiling Vertical backscatter profiles through biophysical and geophysical target volumes: - snow - ice - vegetation - forestry From a single pass, it provides: - retrieval of a set of images at different incidence angles - the incidence angle is constant at every point within an image PRESENTATION - Description of technique - Theory - Experimental examples IGARSS 2011 Vancouver

  3. IGARSS 2011 Vancouver

  4. IGARSS 2011 Vancouver

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  6. xxxxxxx IGARSS 2011 Vancouver

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  10. L D dx i i z P dx L - D d rn r1 p Image region IGARSS 2011 Vancouver

  11. Vs Hs IGARSS 2011 Vancouver

  12. x_res = Θsyn R = λR 2Dcosi r_res = c 2B i θsyn R IGARSS 2011 Vancouver

  13. Hs i r_resV Vs x_resV Vs = r_resV + x_resV IGARSS 2011 Vancouver

  14. r_resV x_resV nadir Vs IGARSS 2011 Vancouver

  15. i r_resV x_resV Hs Vs IGARSS 2011 Vancouver

  16. Across-Track Resolution IGARSS 2011 Vancouver

  17. Ф Vt F Vt = { R.(1-cosФ½) + r_res.cosФ½) }.cosi = Ф.R IGARSS 2011 Vancouver

  18. TP Resolution with Incidence Angle: Airborne V = argmax {Vs (p) , Vt (p) } F-SAR X-band (9.6GHz, B=800MHz) L-Band (1.33GHz,B=150MHz) H=3000m D=300m Ф=5º F = 260m IGARSS 2011 Vancouver

  19. TP Resolution with Incidence Angle: UAV UAV L-band (1.33GHz,B=150MHz) H=300m D=100m Ф=4º F = 20m IGARSS 2011 Vancouver

  20. TP Resolution with Incidence Angle: UAV UAV X-band (9.6GHz,B=800MHz) H=300m D=100m Ф=4º F = 20m IGARSS 2011 Vancouver

  21. Experimental TP Application: Ground-Based • GB-SAR System • Forestry • Snowpack IGARSS 2011 Vancouver

  22. TP Imaging: Forest Canopy IGARSS 2011 Vancouver

  23. IGARSS 2011 Vancouver

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  25. HH 60 0 20 40 VV VH IGARSS 2011 Vancouver

  26. TP Imaging: Snowpack IGARSS 2011 Vancouver

  27. X-Band TP Image 42cm IGARSS 2011 Vancouver

  28. TP Imaging: Laboratory IGARSS 2011 Vancouver

  29. Ku-band (17GHz,B=4GHz) H=2m, D=0.10m, Ф=10º IGARSS 2011 Vancouver

  30. Summary • New Imaging Scheme: Tomographic Profiling (TP) • Provides vertical backscatter profiles through biophysical and geophysical target volumes: • - snow • - ice • - vegetation • - forestry • From a single pass, it provides: • - retrieval of a set of images at different incidence angles • - the incidence angle is constant at every point within an image • Provided experimental results from ground-based field and laboratory measurements • Future work to see airborne demonstration IGARSS 2011 Vancouver

  31. TP Imaging: Resolution C-band (5GHz,B=1.75GHz) H=2-9m, D=0.2m, Ф=30º IGARSS 2011 Vancouver

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