  We discuss several improvements in the detection of atmospheric turbulence
using SLOpe Detection And Ranging (SLODAR). Frequently, SLODAR observations
have shown strong ground-layer turbulence, which is beneficial to adaptive
optics. We show that current methods which neglect atmospheric propagation
effects can underestimate the strength of high altitude turbulence by up to ~
30%. We show that mirror and dome seeing turbulence can be a significant
fraction of measured ground-layer turbulence, some cases up to ~ 50%. We also
demonstrate a novel technique to improve the nominal height resolution, by a
factor of 3, called Generalized SLODAR. This can be applied when sampling
high-altitude turbulence, where the nominal height resolution is the poorest,
or for resolving details in the important ground-layer.
