AMULSE (Atmospheric Measurements by Ultra Light SpEctrometer) is an on-board laser spectrometer, suspended beneath the capsule, which analyses the local concentration of greenhouse gases (CO₂, CH₄) in real time using tunable diode laser spectroscopy.

Electrically powered by our capsule throughout the flight, AMULSE offers greater precision than satellite measurements and allows direct in situ characterization of atmospheric variations. It is used by the GSMA (Molecular and Atmospheric Spectrometry Group) of the University of Reims Champagne-Ardenne to refine climate monitoring models and calibrate environmental satellite sensors.