Extended Data Fig. 3: Conversion from peak energy of photopeaks to planetary potential drop below Endurance.
From: Earth’s ambipolar electrostatic field and its role in ion escape to space
Upleg, top panels; downleg, bottom panels. a,d, Peak energy of N2 A2Πu dominated photopeak as measured. b,e, Energy of photopeak after correction for S/C potential from SLP. c,f, Potential drop below Endurance (as Fig. 2a,b).
