Exosphere Models
Exosphere
Production server sky orbits will be at 6411 kilometer altitude, or above, far into the exosphere. Such high orbits offer little detectable drag to big iron satellites, so their densities are characterized indirectly and perhaps imprecisely above 1000 km altitudes. Thinsats have much higher "sail" ratios and are more sensitive to density.
There are many high altitude atmospheric models, most evolving from Jaccia . Here is an online model from NASA, based on MSIS-E-90 and valid to 1000 km altitude.