# HISUI Level-1G Radiance
*data products*

## Specifications
- **level**: L1
- **distributor**: meti
- **spectral range nm**: {"min":400,"max":2500}
- **spectral band count**: 185
- **gsd m**: {"native":20}
- **file format**: GeoTIFF
- **access endpoint**: https://www.tellusxdp.com
- **access model**: restricted
- **licence**: HISUI / Tellus data licence (free for users affiliated with Japanese institutions, registration required)
- **primary data portal url**: https://www.hisui.go.jp/product/distribution.html
- **use cases**: ["Geometric and atmospheric input for downstream mineral mapping workflows in Japanese exploration programmes","Cross-sensor validation against EnMAP L2A and PRISMA L2D over Japan-domestic test sites","Full VNIR-SWIR hyperspectral surface radiance suitable for spectral unmixing"]
- **practical limitations**: ["Access restricted to individuals affiliated with Japanese companies, organisations, and universities; international researchers cannot register through the public portal as of 2026-05-19","Coverage limited to approximately 51.6 N to 51.6 S due to ISS inclination","Level 2G surface reflectance product (atmospherically corrected) remains under development as of 2026-05-19; L1G is currently the highest-level publicly distributed product","Operational status as of 2026-05-19 carries a CEOS-database EOL caveat (CEOS states December 2025 EOL; operator activity continues, but the status is treated as nominal with this caveat)"]
- **known artefacts**: ["VNIR low-brightness striping was identified during 2025 and corrected in radiometric correction version 4 (released 18 February 2026); pre-v4 L1G products distributed before that date may show residual VNIR striping in shadowed regions","L1G is orthorectified using ALOS World 3D DEM; L1A and L1R precursor products do not include orthorectification"]
- **last verified date**: "2026-05-19T00:00:00.000Z"
- **verified by**: agency-doc
- **claim status**: agency-verified
- **deployment context**: orbital

## Compositional position
- minerals (topics) --[topic_capabilities]--> HISUI Level-1G Radiance

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Source: https://eo-atlas.org/data_products/hisui-l1g
Maintainer: SpectraWorks B.V. (CC-BY 4.0)