A solar spectrum for PFS data analysis

A measured calibrated solar radiance in the range 1.2– 5 μ m , with the spectral sampling of 1 cm - 1 does not exist. When studying the measured Planetary Fourier Spectrometer (PFS) spectra of the Earthʹs or Marsʹs atmosphere we discover that the most used solar spectrum contains several important errors. Here we present a “calibrated” solar radiance in the wavelength range 1.2– 5 μ m , with the spectral resolution of PFS ( 1.3 cm - 1 ) , which we are going to use for studying Martian spectra. This spectrum has been assembled using measurements from Kitt Peak and from ATMOS Spacelab experiment (uncalibrated high resolution) and theoretical results, together with low resolution calibrated continuum. This is the best we can have in this moment to be used with PFS, while waiting to have good solar calibrated radiances. Examples of solar lines at Mars are given.