@Article{egusphere-2026-4360,
AUTHOR = {Alvarado, L. M. A. and Seo, S. and Doicu, A. and Richter, A. and Loyola, D.},
TITLE = {XDOAS: A Unified Covariance--PCA DOAS Framework for Enhanced Trace Gas Retrievals -- Application to OClO from TROPOMI},
JOURNAL = {EGUsphere},
VOLUME = {2026},
YEAR = {2026},
PAGES = {1--39},
URL = {https://egusphere.copernicus.org/preprints/2026/egusphere-2026-4360/},
DOI = {10.5194/egusphere-2026-4360}
}