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As a naturally part of information technology, Remote Sensing (RS) is strongly required to provide very precise and accurateinformation product to serve industry, academy and the public at this information economic era. To meet the needs of high qualityRS product, building a fully functional and advanced calibration system, including measuring instruments, measuring approachesand target site become extremely important. Supported by MOST of China via national plan, great progress has been made toconstruct a comprehensive calibration and validation (Cal&Val) site, which integrates most functions of RS sensor aviation testing,EO satellite on-orbit caration and performance assessment and RS product validation at this site located in Baotou, 600km west ofBeijing. The site is equipped with various artificial standard targets, including portable and permanent targets, which supports forlong-term calibration and validation. A number of fine-designed ground measuring instruments and airborne standard sensors aredeveloped for realizing high-accuracy stepwise validation, an approach in avoiding or reducing uncertainties caused from nonsynchronizedmeasurement. As part of contribution to worldwide Cal&Val study coordinated by CEOS-WGCV, Baotou site isoffering its support to Radiometric Calibration Network of Automated Instruments (RadCalNet), with an aim of providingdemonstrated global standard automated radiometric calibration service in cooperation with ESA, NASA, CNES and NPL.Furthermore, several Cal&Val campaigns have been performed during the past years to calibrate and validate thespaceborne/airborne optical and SAR sensors, and the results of some typical demonstration are discussed in this study

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

COMPREHENSIVE CALIBRATION AND VALIDATION SITE FOR INFORMATION REMOTE SENSING