Longitudinal spectra of Ganymede’s leading hemisphere acquired with JWST. The longitudes are taken between 60° North and 60° South in latitude. The spectrum for 120−150 W represents the morning limb of the leading edge and the evening limb by the 30−60 W spectrum. Colors are used to indicate different longitudinal ranges. The dotted lines represent the Gaussian fit of each individual spectrum which is deconvolved into two Gaussians.