Inferred wave amplitude for the four hodogram panels shown in Fig. 5. The root-mean-square relative line intensity is given versus the equivalent length (in logarithmic units) of the equivalent averaging window in minutes. The squares corresponds to path A, and the asterisks to path B in Fig. 3 for the 23 August 2007 case. The diamonds corresponds to path A, and the crosses to path B in Fig. 4 for the 25 March 2008 case.