Results from deriving atmospheric density from space debris TLEs. (a) Number of objects used over time. (b) Daily and 81-day average of F10.7 in black and the monthly sunspot number in blue on the right axis. (c) Derived mass density as a function of altitude. (d) Ratio between mass density derived from TLEs and given by the JB2008 model. (e) ⟨ρ⟩ from all TLE pairs as a function of altitude, colored after the average F10.7. Only bins with more than 10 TLE pairs are shown.