I'm looking for information on atmospheric density in Earth orbit. All the atmospheric density graphs I've found go no higher than 100 km. Definitions like the US Standard Atmosphere don't go higher than 250k ft.
I'm interested in the rest of the graph, all the way to density =0 (or as low as it gets in interplanetary space). This sits occasionally gets questions about e.g. drag on a satellite, and I've never found a good source, just rules of thumb (drag is significant in LEO, but not an issue in GEO).
I realize atmospheric density fluctuates, I'd be happy with an average value or even better, a bandwidth indication (max. and min. values).