Overview
SIST-TS CEN ISO/TS 19124-2:2026 is an international technical specification developed by the European Committee for Standardization (CEN) in cooperation with ISO, focused on the calibration and validation (Cal/Val) of remote sensing data derived from Synthetic Aperture Radar (SAR) sensors. This standard outlines processes and models for ensuring quality, accuracy, and interoperability of SAR data and products, which are vital for reliable geographic information systems and Earth observation (EO) applications.
The scope of this document includes the definition and implementation of calibration and validation procedures for SAR imagery, addressing not only geometric and radiometric corrections but also characteristic adjustments for both qualitative and quantitative uses. It covers both general and advanced SAR working modes (such as interferometric, polarimetric, and multi-dimensional SAR), along with related calibration and validation metadata not specified in other international geographic information standards.
Key Topics
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Synthetic Aperture Radar (SAR) Calibration
Procedures for geometric, radiometric, and characteristic correction of SAR data, ensuring that imagery meets required standards for further analysis or application.
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Validation of SAR Data and Products
Systematic evaluation of the accuracy and quality of processed SAR imagery and any geophysical products derived from it, including resolution, swath width, geometric, and radiometric accuracy.
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Advanced SAR Working Modes
Guidance on calibration and validation for advanced SAR methods, including:
- Interferometric SAR (InSAR)
- Polarimetric SAR (PolSAR)
- Multi-temporal, multi-aspect, and multi-frequency SAR datasets
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Metadata Requirements
Specification of essential metadata accompanying SAR data calibration and validation to ensure clarity, traceability, and consistent data integration.
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Separation from Sensor Hardware Calibration
Clarification that sensor hardware calibration is addressed by other standards (ISO/TS 19159-3) and not within this document’s scope.
Applications
The guidelines and frameworks provided by SIST-TS CEN ISO/TS 19124-2:2026 play a critical role in a wide range of fields relying on SAR data quality and interoperability:
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Earth Observation and Environmental Monitoring
Accurate calibration and validation are essential for consistent monitoring of environmental changes, natural disasters, and resource management using SAR data across different sensors or platforms.
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Geological and Geophysical Applications
High-quality SAR products support geological mapping, terrain analysis, and subsidence monitoring.
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Disaster Detection and Emergency Response
Consistency and reliability in SAR-derived products are crucial for timely and precise disaster assessment, including flood, earthquake, and landslide detection.
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Urban Planning and Infrastructure Monitoring
Regular, validated SAR observations facilitate monitoring of urban expansion, infrastructure integrity, and land deformities.
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Research and Development
Standardized validation supports collaborative research and increases the value of SAR datasets in scientific studies and technology development.
Related Standards
For effective implementation and conformance, SIST-TS CEN ISO/TS 19124-2:2026 should be considered alongside other relevant standards in geographic information and remote sensing:
- ISO/TS 19124-1: Geographic information – Calibration and validation of remote sensing data and derived products – Part 1: Fundamentals
- ISO/TS 19159-3: Geographic information – Calibration and validation of remote sensing imagery sensors and data – Part 3: Synthetic aperture radar (InSAR and PolSAR sensor calibration)
- ISO 19130-1: Geographic information – Imagery sensor models for geopositioning – Part 1: Fundamentals
Adhering to these interconnected standards ensures interoperability, reliability, and quality in geographic information systems and remote sensing applications utilizing Synthetic Aperture Radar.
Keywords: Synthetic Aperture Radar calibration, SAR data validation, remote sensing standards, Earth observation, SAR metadata, geospatial information, advanced SAR modes, SAR product quality, CEN ISO/TS 19124-2, geoinformatics.