SYSIPHE is an airborne hyperspectral imaging system, result of a cooperation between France (Onera and DGA) and
Norway (NEO and FFI). It is a unique system by its spatial sampling -0.5m with a 500m swath at a ground height of
2000m- combined with its wide spectral coverage -from 0.4μm to 11.5μm in the atmospheric transmission bands.
Its infrared component, named SIELETERS, consists in two high étendue imaging static Fourier transform
spectrometers, one for the midwave infrared and one for the longwave infrared. These two imaging spectrometers are
closely similar in design, since both are made of a Michelson interferometer, a refractive imaging system, and a large
IRFPA (1016x440 pixels). Moreover, both are cryogenically cooled and mounted on their own stabilization platform
which allows the line of sight to be controlled and recorded. These data are useful to reconstruct and to georeference the
spectral image from the raw interferometric images.
The visible and shortwave infrared component, named Hyspex ODIN-1024, consists of two spectrographs for VNIR and
SWIR based on transmissive gratings. These share a common fore-optics and a common slit, to ensure perfect
registration between the VNIR and the SWIR images. The spectral resolution varies from 5nm in the visible to 6nm in
the shortwave infrared.
In addition, the STAD, the post processing and archiving system, is developed to provide spectral reflectance and
temperature products (SRT products) from calibrated georeferenced and inter-band registered spectral images at the
sensor level acquired and pre-processed by SIELETERS and Hyspex ODIN-1024 systems.