GEOSCAN Search Results: Fastlink


TitleNécessité de l'étalonnage radiométrique et standardisation des images numériques de télédétection
AuthorBannari, A; Teillet, P M; Richardson, G
SourceProceedings of the Twentieth Canadian Symposium on Remote Sensing, Calgary, Alberta, Canada; 1998 p. 5-10
Alt SeriesEarth Sciences Sector, Contribution Series 20042650
AbstractMultidate monitoring of the terrestrial environment variation, either regionally, continentally or globally, using various sensors, requires adequate radiometric calibration since the main goal is to obtain biophysical and geophysical surveys that are accurate and reproducible over time. Poor radiometric calibration may introduce up to 50% of error in the assessment of ground biophysical components. Despite major efforts made during the last two decades in this area, some users still neglect radiometric calibration and data standardization in various remote sensing applications. To obtain quality and reliable radiometric data and to maximize the performance of land resource remote sensing, adequate radiometric calibration is essential. This study discusses the relative and absolute calibration of optical sensors, the degradation of their radiometric quality over time on-orbit and of the factors which control the calibration accuracy. Examples are illustrated using the Normalized Difference Vegetation Index (NDVI) for various radiometric considerations, to show users the necessity of calibrating and standardizing remote sensing data to track properly the manoeuvres of ground targets on a standard scale over time.

Date modified: