TIAN Xin, XU Jin, XIE Pin-hua, LI Ang, HU Zhao-kun, LI Xiao-mei, REN Bo, WU Zi-yang. Retrieving Tropospheric Vertical Distribution in HCHO by Multi-Axis Differential Optical Absorption Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2019, 39(8): 2325