GHOST
GreenHouse gas Observations in the Stratosphere and Troposphere

The GreenHouse gas Observations of the Stratosphere and Troposphere (GHOST) is an airborne, compact, shortwave infrared (SWIR) spectrometer developed at the UK Astronomy Technology Centre (UK ATC). It was designed with operating principles similar to those of NASA’s Orbiting Carbon Observatory-2 (OCO-2) satellite. GHOST measures radiance across four spectral bands between 1.27 and 2.3 μm, with a spectral resolution of 0.1-0.3 nm. These measurements are used to retrieve tropospheric columns of greenhouse gases, including methane, carbon dioxide, and carbon monoxide. GHOST is typically deployed on uncrewed aerial vehicles (UAVs), such as NASA’s Global Hawk.