Publication
- Names
-
- K. Stephan
- M. Ciarniello
- O. Poch
- B. Schmitt
- D. Haack
- A. Raponi
- Title
- VIS-NIR/SWIR Spectral properties of H2O Ice depending on particle size and surface temperature
- Abstract
- Laboratory measurements were performed to study the spectral signature of H2O ice between 0.4 and 4.2 µm depending on varying temperatures between 70 and 220 K. Spectral parameters of samples with particle sizes up to ~1360 µm, particle size mixtures and different particle shapes were analyzed. The band depth (BD) of the major H2O ice absorptions at 1.04, 1.25, 1.5 and 2 µm offer an excellent indicator for varying particle sizes in pure H2O ice. Spectral changes due to temperature rather, but not exclusively, affect the H2O ice absorptions located at 1.31, 1.57 and 1.65 µm and the Fresnel reflection peaks at 3.1 and 3.2 µm, which strongly weaken with increas-ing temperature. As the BDs of the H2O-ice absorptions at 1.31, 1.57 and 1.65 µm increase, the band centers (BCs) of the H2O ice absorptions at 1.25 and 1.5 µm slightly shift to shorter wave-lengths. However, the BCs of the strong H2O ice absorptions can also be affected by saturation in case of large particles. The collected spectra provide a useful spectral library for future investi-gations of icy satellites such as Ganymede and Callisto, the major targets of ESA’s JUICE mission.
- Keywords
- spectroscopy, grating spectrometer, gonio radiometer, bidirectional reflection, bidirectional reflectance spectra, near-IR, molecular solid, ice, water ice
- Content
- sample, spectral data, experimental physics, planetary sciences, remote sensing
- Document type
- article
- Publication state
- in press
- Comments
- None