中文说明：SVD奇异值矩阵分解法，线性反演球模型，上层放炮，底部接收，左边放炮，右边接收。各80炮，每炮80道。射线理论正演。SVD奇异值矩阵分解法，线性反演球模型，上层放炮，底部接收，左边放炮，右边接收。各80炮，每炮80道。射线理论正演。
English Description：
SVD matrix singular value decomposition method, the linear inversion sphere model, top gun, receives at the bottom, the left gun, the right to receive. The 80 gun, each shot 80. Ray theory forward. SVD matrix singular value decomposition method, the linear inversion sphere model, top gun, receives at the bottom, the left gun, the right to receive. The 80 gun, each shot 80. Ray theory forward.