Fig. 6
From: Conjugate observations of power line harmonic radiation onboard DEMETER
Variation of ∇Ne. ∇Ne along the orbits with and without PLHR in Jan–Mar and Oct–Dec compared with IRI model at N (a) and at S (b). Orbits with PLHR are shown in red, orbits without PLHR are shown in green and ∇Ne obtained from IRI model is shown in black. ∇Ne along all orbits within per 1° MLat is shown by dots, and 15–85 quantiles of the values of ∇Ne per 1° MLat are shown by bars