MO4.L09 - POTENTIAL AND LIMITATIONS OF FORWARD-LOOKING BISTATIC SAR

Ingo Walterscheid , Thomas Espeter, Jens Klare, Andreas Brenner, Joachim Ender POTENTIAL AND LIMITATIONS OF FORWARD-LOOKING BISTATIC SAR TexPoint fonts used in EMF. Read the TexPoint manual before you delete this box.: A A A A A A A

OUTLINE ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Introduction Monostatic SAR ,[object Object],[object Object],[object Object],Monostatic synthetic aperture radar typically operates with a side-looking antenna to obtain high resolution images ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Introduction Bistatic SAR ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Bistatic synthetic aperture radar operates with spatially separated transmit and receive antennas that are mounted on separated platforms

Bistatic forward-looking SAR Geometry and applications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Bistatic forward-looking SAR Iso-range and iso-Doppler contours (Monostatic case) For monostatic radars it is quite simple:

Bistatic forward-looking SAR Iso-range and iso-Doppler contours (Monostatic case) Tx/Rx Side-looking Forward-looking

Bistatic forward-looking SAR Iso-range contours (Bistatic case) ,[object Object],TX RX R 1 (  ) R 2 (  ) r Bistatic range history Sum of two hyperbolas!

Bistatic forward-looking SAR Iso-range contours (Bistatic case) The set of equal bistatic range is an ellipsoid with its focus points at Tx and Rx (Iso-range surface). The cut with the earth surface is an ellipse (Iso-range-line).

Bistatic forward-looking SAR Iso-range-rate (Doppler) contours (Bistatic case) ,[object Object],[object Object],[object Object]

Bistatic forward-looking SAR Iso-range and iso-Doppler contours Bistatic geometry Red = Iso-range lines, Blue = Iso-Doppler lines Non degenerated image grid in flight direction Rx Tx Monostatic geometry Tx/Rx

Bistatic forward-looking SAR Resolution in range and cross-range ,[object Object],[object Object],Ground cross-range resolution c,  Velocity of light, wavelength B Signal bandwidth u i Unit direction vector (LOS)  xy Projector onto x-y-plane T int Integration time  i Angular speed vector  Angle between gradient of iso-range and iso-Doppler lines  with

Experiment with TerraSAR-X and PAMIR Sensor parameters ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Experiment with TerraSAR-X and PAMIR Bistatic configuration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Experiment with TerraSAR-X and PAMIR Data acquisition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Experiment with TerraSAR-X and PAMIR Pulse synchronization (I) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Experiment with TerraSAR-X and PAMIR Pulse synchronization (II) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Measured timing jitter generated by the recording system (RMS = 86.95 ps)  t 1  t 2  t 3 Ideal PRF

Experiment with TerraSAR-X and PAMIR Expected ground range and cross-range resolution ,[object Object],[object Object]

Experiment with TerraSAR-X and PAMIR Iso-range and iso-Doppler contours (backward-looking) Tx Rx

Experimental results Raw data and range compressed data Amplitude of raw data Range compressed data

Experimental results Google Earth image of the scene

Experimental results Optical image  Bistatic SAR image

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object]

MO4.L09 - POTENTIAL AND LIMITATIONS OF FORWARD-LOOKING BISTATIC SAR

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MO4.L09 - POTENTIAL AND LIMITATIONS OF FORWARD-LOOKING BISTATIC SAR