Which radiometric correction option is not a standard correction used to adjust radiance due to atmospheric conditions?

• A. Noise removal
• B. Sun angle correction
• C. Haze correction
• D. Ozone depletion correction

Answer: (D)

Radiometric corrections that address atmospheric effects are about removing how the atmosphere changes what the sensor sees, through things like how sunlight hits the surface and how aerosols scatter or absorb light. Adjusting for the sun’s position (sun angle) is a classic step because the illumination of the surface changes with time and geometry. Correcting for haze targets the scattering and absorption caused by aerosols in the air, which can make surfaces look lighter or blur details.

Ozone depletion correction isn’t a standard, separate correction used to adjust radiance in this context. Ozone effects are handled within atmospheric radiative transfer models, using ozone as part of the overall atmosphere in those calculations, rather than as a distinct, routine correction step. In contrast, noise removal is about reducing sensor noise, not atmospheric interference, so it isn’t an atmospheric correction per se, but the question focuses on atmospheric-related corrections. Because there isn’t a standard discrete “ozone depletion correction” step, that option is not a standard atmospheric radiance correction.