# ESA Sea State CCI L2P significant wave height
*data products*

## Specifications
- **level**: L2
- **distributor**: esa
- **access endpoint**: https://climate.esa.int/en/projects/sea-state/data/
- **access model**: open
- **primary data portal url**: https://climate.esa.int/en/projects/sea-state/data/
- **use cases**: ["Climate-quality significant wave height","Multi-mission altimeter sea-state record","Sea-state uncertainty analysis"]
- **deployment context**: orbital
- **entity type**: data_product
- **last verified date**: 2026-06-11
- **verified by**: agency-doc
- **claim status**: agency-sourced
- **provider**: esa
- **attributes**: {"level":"L2","distributor":"esa","access_endpoint":"https://climate.esa.int/en/projects/sea-state/data/","access_model":"open","primary_data_portal_url":"https://climate.esa.int/en/projects/sea-state/data/","use_cases":"[\"Climate-quality significant wave height\",\"Multi-mission altimeter sea-state record\",\"Sea-state uncertainty analysis\"]","deployment_context":"orbital"}
- **relevance**: in-scope

## Editorial
The ESA Sea State CCI L2P Significant Wave Height product (v3, DOI 10.5285/8cb46a5efaa74032bf1833438f499cc3) is a climate data record of along-track significant wave height (SWH) derived from multiple satellite radar altimeters, produced under the ESA Climate Change Initiative (CCI) Sea State project.[^esa-sea-state-cci-page][^esa-sea-state-cci-doi]

The product harmonises SWH retrievals from radar altimeters aboard ESA missions including Envisat, CryoSat-2, and Sentinel-3A, together with the Jason-1, Jason-2, and Jason-3 missions, and ISRO/CNES SARAL/AltiKa, covering the period from 2002 to 2020 per the Product User Guide. Each altimeter record is inter-calibrated, reprocessed with consistent algorithms, and delivered as L2P per-pass along-track data in standard CF/Unidata format with per-measurement uncertainty estimates.[^esa-sea-state-cci-page][^esa-sea-state-cci-data] The product page states coverage from multiple ESA and international altimetry missions without exhaustively listing every contributing mission.[^esa-sea-state-cci-page]

Distribution is open access through the ESA CCI data portal. The record is intended for climate trend analysis, wave model validation, and satellite cross-calibration studies.[^esa-sea-state-cci-data]

## Compositional position
- sea-state (topics) --[topic_capabilities]--> ESA Sea State CCI L2P significant wave height

## Sources
- [esa-sea-state-cci-page] | ESA Sea State Climate Change Initiative project page | https://climate.esa.int/en/projects/sea-state/ | tier=agency-doc | accessed=2026-06-11
- [esa-sea-state-cci-data] | ESA Sea State CCI data products | https://climate.esa.int/en/projects/sea-state/data/ | tier=agency-doc | accessed=2026-06-11
- [esa-sea-state-cci-doi] | ESA Sea State CCI v3 L2P along-track SWH DOI | https://doi.org/10.5285/8cb46a5efaa74032bf1833438f499cc3 | tier=agency-doc | accessed=2026-06-11

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Source: https://eo-atlas.org/data_products/esa-sea-state-cci-l2p-swh
Maintainer: SpectraWorks B.V. (CC-BY 4.0)