ITU-R SA.514-3-1997 Interference Criteria for Command and Data Transmission Systems Operating in the Earth Exploration-Satellite and Meteorological-Satellite Services
Active sensors differ from passive sensors in that they illuminate the object under observation and respond to the reflected energy.
ITU-R SA.514-3-1997 history
1997ITU-R SA.514-3-1997 Interference Criteria for Command and Data Transmission Systems Operating in the Earth Exploration-Satellite and Meteorological-Satellite Services