The HySpex ODIN-1024 is an airborne VNIR-SWIR hyperspectral imaging system which advances the state of the art
with respect to both performance and system functionality. HySpex ODIN-1024 is designed as a single instrument for
both VNIR (0.4 to 1 μm wavelength) and SWIR (1 to 2.5 μm) rather than being a combination of two separate
instruments. With the common fore-optics of the single instrument, a more accurate and stable co-registration is achieved
across the full spectral range compared to having two individual instruments. For SWIR the across-the-track resolution is
1024 pixels, while for VNIR the user of the instrument can choose a resolution of either 1024 or 2048 pixels. In addition
to high spatial resolution, the optical design enables low smile- and keystone distortion and high sensitivity obtained
through low F-numbers of F1.64 for VNIR and F2.0 for SWIR. The camera utilizes state of the art scientific CMOS
(VNIR) and MCT (SWIR) sensors with low readout noise, high speed and spatial resolution. The system has an onboard-calibration
subsystem to monitor the stability of the instrument during variations in environmental conditions. It features
an integrated real-time processing functionality, enabling real-time detection, classification, and georeferencing. We
present an overview of the performance of the instrument and results from airborne data acquisitions.
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.
HySpex ODIN-1024 is a next generation state-of the-art airborne hyperspectral imaging system developed by Norsk Elektro Optikk AS. Near perfect coregistration between VNIR and SWIR is achieved by employing a novel common fore-optics design and a thermally stabilized housing. Its unique design and the use of state-of-the-art MCT and sCMOS sensors provide the combination of high sensitivity and low noise, low spatial and spectral misregistration (smile and keystone) and a very high resolution (1024 pixels in the merged data products). In addition to its supreme data quality, HySpex ODIN-1024 includes real-time data processing functionalities such as real-time georeferencing of acquired images. It also features a built-in onboard calibration system to monitor the stability of the instrument. The paper presents data and results from laboratory tests and characterizations, as well as results from airborne measurements.
The SYSIPHE system is the state of the art airborne hyperspectral imaging system developed in European cooperation.
With a unique wide spectral range and a fine spatial resolution, its aim is to validate and quantify the information
potential of hyperspectral imaging in military, security and environment applications. The first section of the paper recalls the objectives of the project. The second one describes the sensors, their implementation onboard the platform and the data processing chain. The last section gives illustrations on the work in progress.