  Atmospheric turbulence profile plays an important role in designing and
operating adaptive optics (AO) systems with multiple laser guide stars. To
obtain representative free atmospheric profiles and resolved ground layer
profiles for future AO systems at the Subaru telescope, we are conducting the
SHARPEST (Shack-Hartmann Atmospheric tuRbulence Profiling Experiment at the
Subaru Telescope) project. In this project, we develop a turbulence profiler
comprising two Shack-Hartmann (SH) sensors to observe a pair of bright stars
through the Subaru telescope with high spatial sampling by 2 cm subapertures.
We perform two analyses on the SH spot data: variance analysis on the spot
scintillation for free atmospheric profiles, and on the spot slope for ground
layer profiles. This paper introduces the initial results of free atmospheric
profiles as well as total seeing values and wind profiles obtained by the first
two engineering runs. The free atmospheric profiles reconstructed by the two
independent SH sensors show good agreement. The results are also consistent
with simultaneous measurements by another profiler except for turbulence
strength at ~1 km, which is explained by an overestimation problem of
scintillation-based profilers. Measured total seeing values are also smaller
than the simultaneous measurements, possibly due to the difference in ground
layer turbulence between the two sites. The wind profiles show good consistency
with the direct measurements by a rawinsonde. Through this study, we establish
a method to constrain the free atmospheric profile, the total seeing, and the
wind profile by analysing data from a single SH sensor with fine subapertures.
