What is the typical functional life expectancy for a satellite orbiting LEO at 400 km before orbital decay?

Answer

Five to seven years

A satellite at 400 km may only have a functional life of five to seven years before its orbit naturally decays sufficiently for re-entry, contrasting with traditional GEO satellites.

What is the typical functional life expectancy for a satellite orbiting LEO at 400 km before orbital decay?
SpaceorbitsatellitesLEOlow earth orbit