Skip to main content
At-Satellite Reflectance: A First Order Normalization Of Landsat 7 ETM+ Images
Publications of the US Geological Survey
  • Chengquan Huang, USGS EROS Data Center
  • Limin Yang, U.S. Geological Survey
  • Collin Homer, U.S. Geological Survey
  • Bruce K. Wylie, USGS EROS
  • James E. Vogelmann, U.S. Geological Survey
  • Thomas DeFelice, USGS
Date of this Version

USGS- science for a changing world (2001) 9 pages


Regional Landsat applications often rely on clear and near cloud-free images. With the spectral value being represented by digital number (DN), however, such images contain substantial noises. A significant proportion of such noises can be normalized by converting the DN to at-satellite reflectance value. Being physically based and ready to automate, the conversion method can serve as a first order normalization of Landsat 7 images, making it possible to derive land surface information from such images more consistently.

Citation Information
Chengquan Huang, Limin Yang, Collin Homer, Bruce K. Wylie, et al.. "At-Satellite Reflectance: A First Order Normalization Of Landsat 7 ETM+ Images" (2001)
Available at: