Final answer:
Radiometric resolution refers to the sensitivity of satellite sensor systems to detect slight differences in electromagnetic energy, related to the detail the sensor can discern in an image's brightness.
Step-by-step explanation:
The radiometric resolution of satellite imagery refers to the sensitivity of the sensor system to detect and discriminate very slight differences in energy or the smallest change in electromagnetic energy levels that a sensor can detect. This means it's all about how well the satellite's sensors can detect finer levels of brightness or reflectance, allowing for more detailed and graded representations in the area being imaged. This type of resolution is also closely related to the number of bits used to represent the energy recorded, as higher radiometric resolution allows for more precise differentiation between changes in energy.