The phrase "error sources" refers to the things or factors that can cause mistakes or inaccuracies in something. It identifies the potential reasons or origins of errors in a particular situation or context.
Sentences with «error sources»
Due to various error sources, standard GPS yields position measurements accurate to approximately 10 meters. (sciencedaily.com)
The uncertainty in that temperature change is tricky to work out because the various error sources are differently correlated in time. (bishop-hill.net)