Remote Sensing Techniques Used to Monitor Thermal Discharge from a Coastal Power Plant

摘要

A surface temperature field study of the region of Angra dos Reis in the state of Rio de Janeiro, using a Precision Radiation Thermometer (Barnes PRT5) from an aircraft and corresponding temperature measurements (sea truth) from a surface boat is presented. The influence of the warm discharge of a coastal power plant on the surface thermal structure of the nearby coastal bays was evaluated. Methods of acquisition, processing and analysis of thermal data obtained simultaneously with the airborne PRT5 and surface temperature measurements are presented. Temperature charts of corrected data are discussed. Effects of atmospheric absorption of infrared thermal radiation due to the presence of water vapor are considered using both radiosonde and aircraft sounding data. ANGRA 02 results show small scale features not easily seen in bulk measurements from the boat. Statistical evaluation of the radiometric data suggests that the airborne PRT5 is capable of providing considerable thermal sensitivity and spatial resolution.