MUMBAI, India, June 24 -- Intellectual Property India has published a patent application (202421096556 A) filed by Tata Consultancy Services Limited on December 06, 2024, for System And Method For Enhanced Radio-Frequency Subsurface Imaging Under Complex Terrain Using Radar And Lidar.
Inventors include Swain, Amit; Gupta, Pathikrit; Khasnobish, Anwesha; Bhaumik, Chirabrata; Chakravarty, Tapas; and Akhtar, Mohammad Jaleel.
The application for the patent was published on June 12, 2026, under issue no. 24/2026.
Abstract: ABSTRACT SYSTEM AND METHOD FOR ENHANCED RADIO-FREQUENCY SUBSURFACE IMAGING UNDER COMPLEX TERRAIN USING RADAR AND LIDAR Existing works perform subsurface imaging without paying attention to the presence of surface undulation, which can cause irregular travel paths for waves emitted by a Radar and may produce defocusing effects in the reconstructed image. The present disclosure estimates noise level of a LiDAR in a stationary mode by considering the standard deviation of a LiDAR sensor data. Successive LiDAR values at every position are tracked for a pre-defined time intervals and if it satisfies a LiDAR stabilization criterion, the LiDAR is considered stable and the LiDAR value obtained is logged as a LiDAR elevation data. A two-layer velocity model is estimated from the LiDAR elevation data and a phase shift operator of a Phase shift migration (PSM) is modified by incorporating the two-layer velocity model. Surface normal information is extracted from the LiDAR elevation data and an amplitude correction factor is formulated using the extracted surface normal information. [
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