The observability of a dynamical system is affected by the presence of external inputs. either known (such as control actions) or unknown (disturbances). Inputs of unknown magnitude are especially detrimental for observability. and they also complicate its analysis. https://www.roneverhart.com/HP-15-fc0093dx-15-6-FHD-Laptop-AMD-Ryzen-5-7520U-2-8-GHz-AMD-Radeon-16GB-LPDDR5-256GB-SSD-Windows-11-Home-S-8F1A6UA/