Abstract: The AVHRR (Advanced Very High Resolution Radiometer) radiometer from NOAA satellite series has five spectral bands/channels, at 1.1 km resolution. Besides meteorological applications, AVHRR data has been widely used in other domains such as forest fire monitoring, sea surface temperature determination, global vegetation monitoring etc. In this study, we present the use of AVHRR LEVEL 1B data from the NOAA satellites series to read and store information from the header part, calibrate AVHRR data to percent reflectance and brightness temperature, compute the effective emissivity surface and to extract the surface temperature. A new analytical model to extract surface temperature from AVHRR LEVEL 1B data is given in this study with some results.