I have amassed a few promising literature articles, and looked at the help files for ENVI, ArcMap and PCI, and no one really goes into great depth on how to interpret spectral values for Tasseled Cap greenness. More specifically, what is the range of healthy vegetation in the greenness band? I know for NDVI it is 0.3-0.5. I'm getting different ranges of values according to different scenes for TC-green, so is the range scene-dependent?
The range is somewhat scene-dependent and Jensen (2007) recommends computing the coefficients locally. This Kauth-Thomas Transformation was designed for the Landsat MSS and TM sensors. Healthy, dense vegetation will have higher values in Brightness and Greenness.