Atıf İçin Kopyala
Saunier S., Karakas G., Yalçın İ., Done F., Mannan R., Albinet C., ...Daha Fazla
Remote Sensing, cilt.14, sa.7, ss.1646, 2022 (SCI-Expanded)
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Yayın Türü:
Makale / Tam Makale
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Cilt numarası:
14
Sayı:
7
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Basım Tarihi:
2022
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Doi Numarası:
10.3390/rs14071646
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Dergi Adı:
Remote Sensing
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Derginin Tarandığı İndeksler:
Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Agricultural & Environmental Science Database, CAB Abstracts, Compendex, INSPEC, Veterinary Science Database, Directory of Open Access Journals
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Sayfa Sayıları:
ss.1646
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Anahtar Kelimeler:
Earth Observation, data quality, SkySat, geometric validation, radiometric validation, maturity matrix, IMAGE-QUALITY, CALIBRATION
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Hacettepe Üniversitesi Adresli:
Evet
Özet
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.