Tomographic Imaging of a Snowpack

摘要: Measuring the physical properties of snow cover is a challenging task that involves destructive sampling. Ground penetrating radar (GPR) provides mean to probe snowpack with limited intrusion. The potential GPR for imaging cross section was examined while evaluating decimetric scale variability cover. Tomographic pack performed bistatic operating at 900 MHz. Data acquisition on 72 cm high seasonal cold day (-10°C). A 150 thick wall delineated by two parallel trenches. Shot points and receiving were located equally spaced intervals along height wall's faces. traveltime pulses in from transmitting antenna measured each shot point every points. In first step, subset horizontal transmission compared vertical profile density permittivity. Results show data are sensitive small changes density. next step consisted performing tomographic inversion set an algorithm devised be biased toward stratification. This design creation artefacts final 2-D image without preventing resolution variabilities. resulting shows more complete obtained comparison pit observations or also thermal interactions faces significantly affect properties. Overall, gave conclusive results. Therefore, this methodology could extended monitor evolution, characterize small-scale detect features like melt pathways ice columns.