L100km

L100km is a term used in several disciplines to denote a scale or threshold of 100 kilometers. It is not a standardized unit, and its meaning varies by field.

In logistics and regional planning, L100km is used as a catchment radius: a facility's service area extending roughly 100 kilometers in all directions. It informs decisions on transportation networks, inventory strategies, and market analysis.

In geosciences and climate modeling, L100km may refer to a characteristic horizontal length scale on the order of 100 km. Some models use L100km as a reference when describing mesoscale processes, grid spacing, or diffusion parameters, helping to separate large-scale dynamics from finer details.

In space and aerospace contexts, L100km sometimes appears as a shorthand for mission planning concerning the 100-km altitude threshold near the Kármán line, or as a class designation for suborbital test flights designed to reach approximately 100 kilometers above the Earth's surface. It is used in policy discussions and program proposals to define “space access” thresholds for governance and funding.

Criticism and alternatives: The lack of standardization can cause confusion; readers should consult field-specific documents to understand the intended meaning. See also: Kármán line, 100 kilometers, mesoscale, grid spacing.