# RefCal Cross-Sensor Calibration
*analysis-service . products*

Cross-sensor spectral calibration and harmonisation service developed by SpectraWorks B.V. Ingests Level-1 radiance data from multiple spaceborne hyperspectral and multispectral instruments and applies a physics-based calibration refinement model (CRM) to produce radiometrically harmonised, cross-sensor comparable reflectance products. Initial focus: VNIR-range sensors including HyperScout-2, EnMAP, EMIT, and Sentinel-2. Designed to run as a post-processing analysis layer downstream of any EO sensor whose L1 data is accessible.

## Specifications
- **product status**: in-development
- **manufacturer**: spectraworks
- **analysis service**: {"processing_capabilities":["Cross-sensor radiometric harmonisation (VNIR 400-1000 nm)","Calibration residual estimation and CI propagation","Spectral resampling to common spectral basis","L1-to-L2 reflectance conversion with atmospheric correction"]}
- **last verified date**: "2026-05-19T00:00:00.000Z"
- **verified by**: sw
- **claim status**: claimed
- **deployment context**: orbital

## Compositional position
- hyperscout-2 (products) --[declared-supported]--> RefCal Cross-Sensor Calibration

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Source: https://eo-atlas.org/products/analysis-service/sw-refcal-analysis
Maintainer: SpectraWorks B.V. (CC-BY 4.0)