Before revision: PFS: The "Planetary Fourier Spectrometer" (PFS) operates in the infrared between the 0.9 µm and 45 µm wavelength range and is designed to perform vertical optical sounding of the Venus atmosphere.
After revision: PFS: The "Planetary Fourier Spectrometer" (PFS) should have operated in the infrared between the 0.9 µm and 45 µm wavelength range and was designed to perform vertical optical sounding of the Venus atmosphere.