  The Indian Institute of Astrophysics (IIA) is developing a Multi-Conjugate
Adaptive Optics (MCAO) system for the Kodaikanal Tower Telescope (KTT). In this
context, we have measured the daytime turbulence strength profile at the
Kodaikanal Observatory. The first method based on wavefront sensor (WFS)
images, called S-DIMM+ (Solar-Differential Image Motion Monitor+), was used to
estimate the higher altitude turbulence up to a height of 5 - 6 km. The second
method used balloon-borne temperature sensors to measure the near-Earth
turbulence up to 350 m. We also carried out simulations to validate the
performance of our system. We report the first-ever daytime turbulence strength
profile measurements at the observatory. We have identified the presence of a
strong turbulence layer about 3 km above the observatory. The measured
near-Earth turbulence matches the trend that is expected from the model for
daytime component of turbulence and gives an integrated $r_0$ of about 4 cm at
500 nm. This is consistent with earlier seeing measurements. This shows that a
low-cost setup with a small telescope and a simple array of temperature sensors
can be used for estimating the turbulence strength profile at the site.
