{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T10:46:43Z","timestamp":1784198803635,"version":"3.55.0"},"reference-count":45,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2022,3,29]],"date-time":"2022-03-29T00:00:00Z","timestamp":1648512000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000844","name":"European Space Agency","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100000844","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Remote Sensing"],"abstract":"<jats:p>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.<\/jats:p>","DOI":"10.3390\/rs14071646","type":"journal-article","created":{"date-parts":[[2022,3,29]],"date-time":"2022-03-29T21:45:51Z","timestamp":1648590351000},"page":"1646","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["SkySat Data Quality Assessment within the EDAP Framework"],"prefix":"10.3390","volume":"14","author":[{"given":"Sebastien","family":"Saunier","sequence":"first","affiliation":[{"name":"Telespazio France, 26 Avenue Jean Fran\u00e7ois Champollion, 31100 Toulouse, France"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gizem","family":"Karakas","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Engineering, Hacettepe University, 06800 Beytepe, Ankara, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4357-937X","authenticated-orcid":false,"given":"Ilyas","family":"Yalcin","sequence":"additional","affiliation":[{"name":"Graduate School of Science and Engineering, Hacettepe University, 06800 Beytepe, Ankara, Turkey"},{"name":"Baskent OSB Technical Sciences Vocational School, Hacettepe University, 06909 Sincan, Ankara, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fay","family":"Done","sequence":"additional","affiliation":[{"name":"Telespazio UK Ltd., 350 Capability Green, Luton, Bedfordshire LU1 3LU, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rubinder","family":"Mannan","sequence":"additional","affiliation":[{"name":"Telespazio UK Ltd., 350 Capability Green, Luton, Bedfordshire LU1 3LU, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Clement","family":"Albinet","sequence":"additional","affiliation":[{"name":"European Space Agency, ESRIN, Via Galileo Galilei, 1, 00044 Frascati, RM, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Philippe","family":"Goryl","sequence":"additional","affiliation":[{"name":"European Space Agency, ESRIN, Via Galileo Galilei, 1, 00044 Frascati, RM, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2775-7914","authenticated-orcid":false,"given":"Sultan","family":"Kocaman","sequence":"additional","affiliation":[{"name":"Department of Geomatics Engineering, Hacettepe University, 06800 Beytepe, Ankara, Turkey"},{"name":"ETH Zurich, Institute of Geodesy and Photogrammetry, 8093 Zurich, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Mannan, R., Halsall, K., Albinet, C., Ottavianelli, G., Goryl, P., Boccia, V., Melchiorre, A., Piro, A., Giudici, D., and Fox, N. (2019, January 10). ESA\u2019s Earthnet data assessment pilot: Paving the way for new space players. Proceedings of the International Society for Optics and Photonics, Sensors, Systems, and Next-Generation Satellites XXIII, Strasbourg, France.","DOI":"10.1117\/12.2532818"},{"key":"ref_2","unstructured":"(2022, February 03). ESA EDAP, Earthnet Data Assessment Pilot Project. Available online: https:\/\/earth.esa.int\/eogateway\/activities\/edap."},{"key":"ref_3","unstructured":"Saunier, S., Melchiorre, A., Halsall, K., Mannan, R., Albinet, C., Ottavianelli, G., Goryl, P., and Boccia, V. (2019, January 18\u201322). EDAP Framework for the geometric validation of high resolution optical data. Proceedings of the VH-RODA Workshop, Frascati, Italy."},{"key":"ref_4","doi-asserted-by":"crossref","unstructured":"Hunt, S.E., Albinet, C., Nickeson, J., Hall, A., Fox, N., Boccia, V., and Goryl, P. (2021, January 11\u201316). A Quality Assurance Framework for Satellite Earth Observation Missions. 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