A method for measuring at least one atmospheric parameter chosen from atmospheric temperature and/or at least one atmospheric gas having a signature in the ultraviolet and/or the visible and/or the infrared such as O 3, NO 2, SO 2, CO, PM1, PM2.5, PM10, H 2 O, CO 2, CH 4, N 2 O or NH 3, the method comprising: - an acquisition step in which a series of spectral images of the terrestrial atmosphere are simultaneously acquired with multi-spectral optical systems (1A-1D) working in a wavelength domain ranging from ultraviolet to infrared: o located in the terrestrial atmosphere, o fastened relative to a terrestrial reference frame, o oriented so that the spectral images that they acquire contain measurement data of said at least one atmospheric parameter along the respective lines of sight (2A1-2D1) of said optical systems (1A-1D), o arranged so that, during this acquisition step, there is at least one intersection point (11; I2) between two lines of sight (2A1, 2B1; 2C1, 2D1), so that two spectral images simultaneously acquired along these two lines of sight (2A1, 2B1; 2C1, 2D1) contain mutual measurement data of the at least one atmospheric parameter, these mutual measurement data being representative of the at least one atmospheric parameter at a point of the terrestrial atmosphere corresponding to said intersection point (11; 12), - a scanning step in which the orientation of the optical systems (1A-1D) is modified, and in that the acquisition step and the scanning step are repeated so as to acquire a succession of series of spectral images comprising a set of mutual measurement data representative of the at least one atmospheric parameter in a set of points of the terrestrial atmosphere. - an acquisition step in which a series of spectral images of the terrestrial atmosphere are simultaneously acquired with multi-spectral optical systems (1A-1D) working in a wavelength domain ranging from ultraviolet to infrared: o located in the terrestrial atmosphere, o fastened relative to a terrestrial reference frame, o oriented so that the spectral images that they acquire contain measurement data of said at least one atmospheric parameter along the respective lines of sight (2A1-2D1) of said optical systems (1A-1D), o arranged so that, during this acquisition step, there is at least one intersection point (11; I2) between two lines of sight (2A1, 2B1; 2C1, 2D1), so that two spectral images simultaneously acquired along these two lines of sight (2A1, 2B1; 2C1, 2D1) contain mutual measurement data of the at least one atmospheric parameter, these mutual measurement data being representative of the at least one atmospheric parameter at a point of the terrestrial atmosphere corresponding to said intersection point (11; 12), o located in the terrestrial atmosphere, o fastened relative to a terrestrial reference frame, o oriented so that the spectral images that they acquire contain measurement data of said at least one atmospheric parameter along the respective lines of sight (2A1-2D1) of said optical systems (1A-1D), o arranged so that, during this acquisition step, there is at least one intersection point (11; I2) between two lines of sight (2A1, 2B1; 2C1, 2D1), so that two spectral images simultaneously acquired along these two lines of sight (2A1, 2B1; 2C1, 2D1) contain mutual measurement data of the at least one atmospheric parameter, these mutual measurement data being representative of the at least one atmospheric parameter at a point of the terrestrial atmosphere corresponding to said intersection point (11; 12), - a scanning step in which the orientation of the optical systems (1A-1D) is modified,