Korea's first Earth observation satellite equipped with synthetic aperture radar, supporting ground and ocean observations in all-weather conditions.
About KOMPSAT-5 at KARIKOMPSAT-5 NRB is a Normalised Radar Backscatter product derived from synthetic aperture radar (SAR) observations acquired by KOMPSAT-5, also known as Arirang-5. The Korea Aerospace Research Institute (KARI) is developing the product under the CEOS Analysis Ready Data (CEOS-ARD) framework.
This page provides an overview of the products and links to the product description, algorithm documentation and quality assessment report.
The NRB product concept combines geometric correction and radiometric terrain correction to support the analysis of SAR backscatter. Product-specific processing methods, backscatter conventions, image layers and metadata will be described in the documentation below.
| Source satellite / sensor | KOMPSAT-5 (Arirang-5) / COSI |
|---|---|
| Product type | Normalised Radar Backscatter (NRB) |
| Production Software version | v0.1 |
| Modes, polarisations and pixel spacing | Modes and pixel spacing:
|
| Backscatter convention and units | Terrain flattened Gamma naught, Power scale coefficient |
| Coordinate system, format | MGRS, GeoTIFF |
| Layers |
|
For information on the CEOS-ARD framework and product specifications, see the CEOS Analysis Ready Data website.
Self-assessment against the CEOS-ARD Product Family Specification (PFS) for SAR Normalised Radar Backscatter.
Sample KOMPSAT-5 NRB products.
KARD-PUM-SAR-001 · Version 1.0 (2026-08-25)
KARD-ATBD-SAR-001 · Version 1.0 (2026-08-25)
Quality assessment reports for selected KOMPSAT-5 NRB sample products are as follows.
Quality assessment of the input SLC data.
Quality assessment of the SAR K-ARD products.
Data distribution arrangements can be conducted by KARI. Access information and any sample-product download links will be provided at confirmation.
The planned licence for the technical documentation is Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0).
Conditions for access to and use of KOMPSAT-5 NRB data products will be specified separately by KARI. The documentation licence does not establish the data-product terms.
Cal/Val & Image Quality Research Team
Korea Aerospace Research Institute (KARI)
Contact email: kiyaes@kari.re.kr
D. Small, “Flattening Gamma: Radiometric Terrain Correction for SAR Imagery,” IEEE
Transactions on Geoscience and Remote Sensing,
vol. 49, no. 8, pp. 3081–3093, 2011. DOI: 10.1109/TGRS.2011.2120616