FPhw is always around at 750ns?

Hello all,

  1. What is the actual reason that the first path is always around 750ns?
  2. Can I somehow get the values of the COARSE timestamp and correction factor obtained from CIR by LED algo?
  3. in order to study the reflections and detect the change in the environment from CIR: Is the obtained CIR is enough or any further conversion or signal processing required?