Multilayer radar backscattering coherent simulator

The multilayer coherent simulator presented here is a tool to efficiently simulate radar backscattering from layered geologies. The simulator takes as input the instrument parameters (central frequency, bandwidth, emitted waveform, etc.), a DEM with an arbitrary number of layers, a geoelectrical model of the multilayer DEM, and the instrument trajectory over this DEM. The physical and mathematical details of the simulator are presented in publications [1][2] below. The code, written in MATLAB®, can be downloaded from the link below. A basic user guide is provided in the README.txt file. As a precautionary measure, the code is password-protected. Please contact me to receive the appropriate credentials.

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Features

The example shown here is a three-layer terrain of Oceanus Procellarum, simulated as seen through the LRS instrument on JAXA's Kaguya probe, which orbited the Moon from 2007 to 2009. The first image display the ground track of the instrument on the surface DEM (constructed from LOLA data), the second one, a not-to-scale 3D representation of the three-layer terrain, and the third, a representation of the emitted (baseband) signals and their autocorrelation function.

Ground track 3D terrain representation Time-domain signals

The next two images show the output of the simulation with two levels of processing: range-compression only and unfocused SAR processing. Power is shown in decibel scale, and phase as a hue plot.

Range-compressed radargram Unfocused SAR radargram

Publications

You are kindly asked to cite the authors if results coming from this simulator are used in published material. The first reference is a conference paper presented in IGARSS 2018, while the second is the corresponding full paper, published in IEEE Transactions on Geoscience and Remote sensing.

  1. C. Gerekos et al., "A new technique for simulating radar echoes from layered subsurface targets", International Geoscience and Remote Sensing Symposium 2018, Valencia, Spain.
  2. C. Gerekos et al., "A coherent multilayer simulator of radargrams acquired by radar sounder instruments", IEEE Transactions on Geoscience and Remote Sensing (accepted for publication, 2018), 10.1109/TGRS.2018.2851020.

Thank you.