Cold Surfaces spectroscopy, Institut de Planétologie et Astrophysique de Grenoble (IPAG) Grenoble, France; 
The facility houses a unique home-made Spectro-Gonio Radiometer that allows measurement of the bidirectional reflectance spectra and photometric distribution functions of various types of planetary materials (granular to compact) over almost the whole solar spectrum, from the visible to the near-IR (from 0.4 to 4.8 µm), with a high degree of radiometric accuracy (better than +/-0.5%) under most viewing geometries (illumination and observation up to almost 80°, all azimuths, phase angle > 4-10°). The instrument is fully described in Brissaud et al. 2004, Appl. Optics, 43, 1926-1937.
The instrument is located in a dark cold room that can be cooled down to -20°C. It is fully automatized and the data calibration and reduction are made with homemade software.
Different types of measurements can be programmed with different environmental cryogenic cells:
           -simple reflectance spectra at one geometry (possibly varying with time, temperature, or physical/chemical process),
           -full BRDF,
           -limited angle BRDF spectra (SERAC and CarboN-IR cells),
           -or all these but only at selected wavelengths.
Serac cell and its thermodynamic systemSerac cell and its thermodynamic system
A new spectro-gonio radiometer is under development to include Near-IR channel + calibration and optimized for the measurement, at low temperature, of bidirectional reflectance spectra, over the visible and near-IR (~ 0.3 to 5 µm), of very small dark and/or very fine grained samples (organics, meteorites, minerals) down to about 1 mm3 in volume.
For further information contact: Bernard Schmitt 
Spectro-Gonio Radiometer with its stabilized monochromatic source , the goniometer with illumination mirror, an open sample holder with sulfur powder and the detectors and the goniometer and detection electronics.Spectro-Gonio Radiometer with its stabilized monochromatic source , the goniometer with illumination mirror, an open sample holder with sulfur powder and the detectors and the goniometer and detection electronics.
CarboN-IR environmental cell inside the goniometerCarboN-IR environmental cell inside the goniometer