The brightness, greenness and wetness of the derived transformation collectively explained over 97% of the spectral variance of the individual scenes used in this study. Keyword: tasseled cap transformation, at-satellite reflectance, and Landsat 7. Running headline: At-satellite reflectance based tasseled cap transformation. For the 1988 and 1993 Landsat TM images, tasseled cap indices were calculated using the Erdas Imagine 8.6 (Erdas Field Guide, 1999) tasseled cap function. The tasseled cap transformation could not be computed for the 1991 data because only TM bands 3, 4 and 5 were available. Tasseled Cap Transformation Tasseled Cap transformation is one of the available methods for enhancing spectral information content of Landsat TM data. Tasseled Cap transformation especiallyoptimizes data viewing for vegetation studies. Tasseled Cap index was calculated fromdata of the related six TM bands. Three of the six tasseled cap Derivation of a tasselled cap transformation based on Landsat 7 at-satellite reflectance C. Huang Homer, Collin; and Zylstra, G., "Derivation of a tasselled cap transformation based on Landsat 7 at-satellite reflectance" (2002).USGS Staff -- Published Research. 621. Handbook(Irish2000). Comparison of Tasseled Cap-based Landsat data structures for use in forest disturbance detection Sean P. Healey a,*, Warren B. Cohen a, Yang Zhiqiang b, Olga N. Krankina b aUSDA Forest Service, PNW Research Station, 3200 SW Jefferson Way, Corvallis, OR 97331, United States bDepartment of Forest Science, Oregon State University, 321 Richardson Hall, Corvallis, OR 97331, United States The Tasseled Cap Transformation was developed in 1976 by R.J. Kauth and G.S. Thomas of the Environmental Research Institute of Michigan (ERIM). In the paper (Kauth and Thomas, 1976), the transformation provided a rationale for the patterns found in Landsat MSS data of agricultural fields as a function of the life cycle of the crop. successively along the same Landsat