Profiles of the structure characteristic for temperature fluctuations No2 and the outer scale of atmospheric turbulence L0 are reconstructed from the data of acoustic sounding with the Zvuk-2 three-channel Doppler sodar. An iterative algorithm considering the turbulent signal attenuation is used for sodar data interpretation. A comparison between sodar derived No2 and in situ measurements with micropulsation sensors demonstrates their good agreement. For the first time, vertical profiles of the outer scale of atmospheric turbulence have been obtained for the atmospheric boundary layer. Sodar derived L0 agree well with the estimates of the effective outer scale of turbulence by optical methods.