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Hindi Journal of Hydrogeology & Hydrologic EngineeringISSN: 2325-9647
Shirzad Roohi Author
Subjects of specialization
Affiliation
inland, water bodies
Copernicus Mission Division, Sentinel-6/Jason-CS mission, Eumetsat, Darmstadt, Germany
Biography
Shirzad Roohi did his Ph.D in the Aerospace engineering and geodesy department of Stuttgart university in Stuttgart, Germany. Shirzad does research in Satellite Geodesy-Altimetry and Remote Sensing. He professionally develops and works with radar altimetry waveform retracking algorithms, specially SAR altimeters. He also works in the field of satellite signal processing, SDR, designing FPGA in Matlab/Simulink. He involves in few research projects based on the satellite radar and remote sensing techniques for monitoring inland water bodies, ice sheet and climate change. He is currently in the frame work of Copernicus program in the filed of altimetry.
Publications
Research Article Subscription
Lake Monitoring from a Combination of Multi Copernicus Missions: Sentinel-1 A and B and Sentinel-3A
Author(s): Shirzad Roohi, Arash Amini, Behzad Voosoghi,and Douglas Battles
Monitoring water volume changes of a given lake needs precise estimation of water level and water surface variations. The water level of the lake might be erroneous due to multi reflections, called multi peak waveforms, from the illuminated area inside the radar footprint. Bathymetry data are also not available everywhere to measure the absolute water volume storage.
To derive optimized ranges and consequently more precise water level, corrupted waveforms need to be analyzed. We developed a new approach to select an optimal peak in a given waveform to be retracked with the threshold retracker. We selected a peak, which provides a water level closest to the in situ gauge. In another scenario, we involved all meaningful peaks in a given waveform and considered the average of ret... view more»
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