  An approach is demonstrated for comparing the temperature of the upper
atmosphere obtained by ground-based and satellite methods. A method for
calibrating ground-based instruments (Fabry-Perot interferometer) based on the
data obtained and determining the exact altitude at which the temperature was
measured by ground-based means is proposed. Based on the assumption that the
temperatures are connected in a linear fashion, the coefficients of the
temperatures connection are determined by the least squares method. We use
information on the temperature of the upper atmosphere for 2017-2018 obtained
by the SABER TIMED and MLS Aura satellite instruments, and by the Fabry-Perot
interferometer located at the Tory geophysical observatory of the ISTP of the
SB RAS observing the 557.7 nm oxygen line, the emission height is ~ 100 km. The
scale factor about 0.99 and the displacement coefficient about 120K were
obtained for the temperature data using an interferometer at a height of 92 km
for which the seasonal variation of the temperatures of the interferometer most
closely corresponds to the seasonal variation of the temperatures obtained by
SABER TIMED. The coefficients can then be used as calibration values for the
interferometer.
