scope:

This document describes a process for the estimation of orbit lifetime for satellites, launch vehicles, upper stages and associated debris in LEO-crossing orbits. Not that this document only deals with orbit lifetime issues (orbit decay out of orbits crossing the LEO protected region); for other important requirements related to how long a space object will, or will not, cross or occupy a protected region, the user is directed to ISO 24113 and its derivative ISO 23312.

The document also clarifies the following:

i) modelling approaches and resources for solar and geomagnetic activity modelling;

ii) resources for atmosphere model selection;

iii) approaches for satellite ballistic coefficient estimation.