<?xml version='1.0' encoding='UTF-8'?><codeBook xmlns="ddi:codebook:2_5" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="ddi:codebook:2_5 https://ddialliance.org/Specification/DDI-Codebook/2.5/XMLSchema/codebook.xsd" version="2.5"><docDscr><citation><titlStmt><titl>CrIS Observations of Gravity Waves</titl><IDNo agency="DOI">doi:10.26165/JUELICH-DATA/JSCAKL</IDNo></titlStmt><distStmt><distrbtr source="archive">Jülich DATA</distrbtr><distDate>2025-12-15</distDate></distStmt><verStmt source="DVN"><version date="2025-12-15" type="RELEASED">1</version></verStmt><biblCit>Hoffmann, Lars, 2025, "CrIS Observations of Gravity Waves", https://doi.org/10.26165/JUELICH-DATA/JSCAKL, Jülich DATA, V1</biblCit></citation></docDscr><stdyDscr><citation><titlStmt><titl>CrIS Observations of Gravity Waves</titl><IDNo agency="DOI">doi:10.26165/JUELICH-DATA/JSCAKL</IDNo></titlStmt><rspStmt><AuthEnty affiliation="Forschungszentrum Jülich">Hoffmann, Lars</AuthEnty></rspStmt><prodStmt><software version="v1.1">CrIS Code Collection</software><grantNo agency="GCS/NIC">slmet</grantNo></prodStmt><distStmt><distrbtr source="archive">Jülich DATA</distrbtr><contact affiliation="Forschungszentrum Jülich" email="l.hoffmann@fz-juelich.de">Hoffmann, Lars</contact><depositr>Hoffmann, Lars</depositr><depDate>2025-12-12</depDate></distStmt></citation><stdyInfo><subject><keyword>Computer and Information Science</keyword><keyword>Earth and Environmental Sciences</keyword><keyword>gravity waves</keyword><keyword>remote sensing</keyword><keyword>stratosphere</keyword></subject><abstract>This data repository provides access to atmospheric gravity wave observations derived from the Cross-Track Infrared Sounder (CrIS) onboard the Suomi National Polar-orbiting Partnership (Suomi NPP) and NOAA Joint Polar Satellite System (JPSS) satellites. Stratospheric gravity wave activity is inferred from infrared radiance measurements in the 4.3 µm and 15 µm carbon dioxide absorption bands. The repository includes browse imagery and daily netCDF data files containing brightness temperature products, with coverage from 2015 to the present.</abstract><sumDscr><timePrd cycle="P1" event="start" date="2015-11-02">2015-11-02</timePrd><dataKind>netCDF files</dataKind><dataKind>browse images</dataKind></sumDscr></stdyInfo><method><dataColl><sources/></dataColl><anlyInfo/></method><dataAccs><setAvail/><useStmt/></dataAccs><othrStdyMat/></stdyDscr></codeBook>