# PRISMA L2D Surface Reflectance
*data products*

## Specifications
- **level**: L2
- **distributor**: asi
- **spectral range nm**: {"min":400,"max":2505}
- **spectral band count**: 239
- **gsd m**: {"native":30}
- **file format**: HDF5 (.he5)
- **access endpoint**: https://prisma.asi.it
- **access model**: open
- **licence**: Free for registered users; no fee; ASI terms of use apply
- **primary data portal url**: https://prisma.asi.it
- **use cases**: ["Alteration mineral mapping and lithological discrimination across full VNIR-SWIR range (400-2505 nm)","Carbonatite and rare-earth element deposit characterisation using SWIR absorption features","Cross-sensor comparison and validation against EnMAP L2A and EMIT L2A for geological mapping","Vegetation canopy biochemistry and land cover classification","Archive tasking for targeted mineral exploration areas via ASI CNM Access System"]
- **practical limitations**: ["VNIR-SWIR detector overlap zone (920-1010 nm) contains 9 bands present in both cubes; standard preprocessing retains only VNIR-cube bands in this zone, reducing effective hyperspectral coverage","Atmospheric correction algorithm not publicly documented by ASI; independent validation of correction quality limited in the accessible literature","30 m GSD limits sub-hectare mapping accuracy; outcrop-scale spectral mixing is a common issue at this resolution","30 km swath requires multiple acquisition passes to cover large exploration concession areas","29-day nadir repeat cycle; off-nadir manoeuvre enables 7-day relook but at reduced geometry quality","Single satellite with no constellation redundancy; acquisition gaps occur during instrument downtime or scheduling conflicts"]
- **known artefacts**: ["VNIR-SWIR detector join at approximately 920-1010 nm: 9 bands appear in both the VNIR and SWIR HDF5 sub-cubes; the standard practice (Vangi et al. 2021) is to retain VNIR-cube bands and discard SWIR-cube bands in this zone before spectral analysis","Noisy spectral regions near the detector boundary (approximately 885-970 nm and 1015-1050 nm) are routinely excluded in preprocessing (Verrelst et al. 2021); these exclusions are user-applied, not part of the L2D product definition"]
- **last verified date**: "2026-05-19T00:00:00.000Z"
- **verified by**: community
- **claim status**: agency-verified
- **deployment context**: orbital

## Compositional position
- minerals (topics) --[topic_capabilities]--> PRISMA L2D Surface Reflectance

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Source: https://eo-atlas.org/data_products/prisma-l2d
Maintainer: SpectraWorks B.V. (CC-BY 4.0)