Sensor noise, speckle, and artefacts
Real-world imagery has imperfections. How they are handled determines whether downstream analytics produce reliable results.
All sensors produce noisy data to some degree — random pixel-level variation that is not real ground signal. Optical sensors have radiometric noise (especially in low-light bands). SAR sensors have speckle noise that comes from coherent radar imaging. High off-nadir captures have geometric distortion. Hot pixels, banding, and cosmic ray hits all happen periodically.
Why volume helps
Geopera processes over a million square kilometres of imagery per year. At that volume, you encounter every edge case the data can throw at you — weird sensor artefacts, exotic atmospheric conditions, odd terrain, corrupted telemetry, alignment failures that only show up over specific geographies. We have solved most of them. When we hit a new one, we solve it at no cost to you, because the fix makes our pipeline better for everyone who comes after.