In this paper, we propose a new method for data fusion in the multichanne! imaging system verified based on the dataobtained by Landsat 7 Enhanced Thematic Mapper +. Advantage of the presented method consists in the application ofmultilevel approach of the spectral bands data fusion. This was confirmed based on the comparison of systems withmultilevel or pixel level only data fusions methods.Keywords: multichannel imaging systems, data fusion, satellite imaging. 1. MODERN MULTICHANNEL SATELLITE IMAGING SYSTEM Advance surveillance systems built based on the multiple sensor and corresponding data fusion strategies allow solving different remote sensing, environmental monitoring, and target identification and tracing problems. Intensive development of modern electronics gives possibility to create advance surveillance systems, built based on the fusion ofdata that were obtained using different physical principles. Design of these systems set new requirements to the sensormanufacturing technologies, data processing techniques, etc, and combines knowledge from different disciplines, such asstatistics, theory of detection and estimation, control theory, signal and image processing. Broad and intensive usage ofsatellite-based systems extends possibility of remote sensing to perform continuous observation of Earth surface. Startedat early 70's this direction has been developed into significant area that incorporates set of satellites and correspondingground systems, based on which data transmission is performed. After corresponding processing obtained data areintensively used for the agriculture, forestry and range resources, land usage and mapping, coastal resources purposes;geology; hydrology; and environmental monitoring. Focusing onto optical and infrared bands, images with wide range ofresolutions (Table 1) can be acquired by modem satellite imaging system.Satellite Resolution of multispectralsensor, mResolution ofpanchromatic sensor, mIndian Remote Sensing Satellite (IRS)