SkySat Data Quality Assessment within the EDAP Framework

Cal/Val activities within the Earthnet Data Assessment Pilot (EDAP) Project of the European Space Agency (ESA) cover several Earth Observation (EO) satellite sensors, including Third-Party Missions (TPMs). As part of the validation studies of very-high-resolution (VHR) sensor data, the geometric and...

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Bibliographic Details
Published in:	Remote sensing (Basel, Switzerland) Switzerland), 2022-04, Vol.14 (7), p.1646
Main Authors:	Saunier, Sebastien, Karakas, Gizem, Yalcin, Ilyas, Done, Fay, Mannan, Rubinder, Albinet, Clement, Goryl, Philippe, Kocaman, Sultan
Format:	Article
Language:	eng
Subjects:	Accuracy Calibration Data collection data quality Earth Earth Observation Earth observations (from space) Earthnet Evaluation Geometric accuracy geometric validation High resolution Image quality maturity matrix Metadata Polynomials Quality assessment Quality control radiometric validation Random errors Satellite observation Satellites Sensors Signal to noise ratio SkySat Spatial discrimination Spatial resolution Values
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Summary:	Cal/Val activities within the Earthnet Data Assessment Pilot (EDAP) Project of the European Space Agency (ESA) cover several Earth Observation (EO) satellite sensors, including Third-Party Missions (TPMs). As part of the validation studies of very-high-resolution (VHR) sensor data, the geometric and radiometric quality of the images and the mission compliance of the SkySat satellites owned by Planet were evaluated in this study. The SkySat constellation provides optical images with a nominal spatial resolution of 50 cm, and has the capacity for multiple visits of any place on Earth each day. The evaluations performed over several test sites for the purpose of the EDAP Maturity Matrix generation show that the high resolution requirement is fulfilled with high geometric accuracy, although various systematic and random errors could be observed. The 2D and 3D information extracted from SkySat data conform to the quality expectations for the given resolution, although improvements to the vendor-provided rational polynomial coefficients (RPCs) are essential. The results show that the SkySat constellation is compliant with the specifications and the accuracy results are within the ranges claimed by the vendor. The signal-to-noise ratio assessments revealed that the quality is high, but variations occur between the different sensors.
ISSN:	2072-4292 2072-4292