Numerical results The 20th trace before and after beamforming 0.15 a... Denoised Data eamforming for Level 1 Original Noisy Data -0.05 4州峡 -0.15 -0.25 100 400500 700 900 1000 A Direct Numerical Imaging Method 34 National University of Defense TechnologyA Direct Numerical Imaging Method Numerical results 34 0 100 200 Beamformed for level 1. 300 400 500 600 700 800 900 1000 -0.3 -0.25 -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 The 20th trace before and after beamforming. Denoised Data Beamforming for Level 1 Original Noisy Data