{"ob_id":44817,"uuid":"6181ff81c7dc4ab2a492c8f53f58df52","title":"Deformation, Strains, and Velocities for the Tibetan Plateau from Sentinel-1 InSAR, GNSS, and Levelling Data, version 1","abstract":"This dataset provides velocity and strain rate fields for the Tibetan Plateau derived from Sentinel-1 Interferometric Synthetic Aperture Radar (InSAR), Global Navigation Satellite System (GNSS), and levelling data. Interferograms in GeoTIFF format at ~100 m resolution are available from the Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics - Looking Inside the Continents from Space InSAR (COMET-LiCSAR) portal (https://comet.nerc.ac.uk/comet-lics-portal/). Using the Looking Inside the Continents from Space with Small Baseline Subset (LiCSBAS) approach, line-of-sight displacement time series and average velocities at ~1 km resolution are inverted, applying corrections for troposphere, ionosphere, Earth tides, and plate motions. Also compiling GNSS velocities and levelling observations from published studies. Following the velmap methodology, a unified coarse 3D velocity field is obtained that fits the GNSS, levelling, and InSAR data. From this, mosaics of ascending and descending line-of-sight velocities in a Eurasia reference frame. Inverting pixel-by-pixel for the east-west and vertical velocities directly from the referenced line-of-sight velocities, using the north–south velocities from the coarse 3D velocity model as a constraint. Strain and rotation rates are calculated from the horizontal gradients of the median-filtered east-west velocities at InSAR resolution and the north-south velocities from the coarse velocity model. Further details are provided in Wright et al. (2025, Science).\r\n\r\nThe directory overview for this dataset are given below:\r\nENU_vels/\r\nEast-west, north-south, and vertical velocity fields, along with their associated uncertainties.\r\n \r\ngeoreferenced_los_vels/\r\nLine-of-sight (LOS) velocities in a Eurasia-fixed reference frame defined by GNSS\r\n \r\nGNSS_levelling_data/\r\nCompiled GNSS velocities and levelling rates from published studies.\r\n \r\nLiCSBAS_los_vels/\r\nOriginal LOS velocities and displacement time series derived from LiCSBAS processing.\r\n \r\nstrain_rates/\r\nComponents of the horizontal velocity gradient tensor, second invariant, maximum shear, dilatation, and vorticity.\r\n \r\nvelmap_strain_rates/\r\nStrain rates calculated from velmap.\r\n\r\nvelmap_vels/\r\nCoarse 3D velocity model derived from velmap.","keywords":"COMET, Sentinel 1","publicationState":"citable","dataPublishedTime":"2025-08-21T13:35:57","doiPublishedTime":"2025-08-21T13:53:09","updateFrequency":"","status":"completed","result_field":{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/44818/?format=json","dataPath":"/neodc/comet/publications_data/Wright_etal_2025_Tibet/v1.0","oldDataPath":[],"storageLocation":"internal","storageStatus":"online","volume":44692558075,"numberOfFiles":7590,"fileFormat":"These data are provided in GeoTiff format."},"timePeriod":"https://catalogue.ceda.ac.uk/api/v2/times/12632/?format=json","geographicExtent":"https://catalogue.ceda.ac.uk/api/v2/bboxes/4868/?format=json","nonGeographicFlag":false,"phenomena":["https://catalogue.ceda.ac.uk/api/v2/phenomona/18405/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/18408/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/68619/?format=json","https://catalogue.ceda.ac.uk/api/v2/phenomona/82955/?format=json"],"dataLineage":"Data were produced by the project team and supplied for archiving at the Centre for Environmental Data Analysis (CEDA).","removedDataTime":null,"removedDataReason":"","language":"English","identifier_set":["https://catalogue.ceda.ac.uk/api/v2/identifiers/13514/?format=json"],"projects":["https://catalogue.ceda.ac.uk/api/v2/projects/11687/?format=json"],"observationcollection_set":[],"responsiblepartyinfo_set":["https://catalogue.ceda.ac.uk/api/v2/rpis/214612/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214621/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214617/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214615/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214614/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214613/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214610/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214611/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214622/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214623/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214620/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214624/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214625/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214626/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214618/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214616/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214627/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214628/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214629/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214630/?format=json","https://catalogue.ceda.ac.uk/api/v2/rpis/214631/?format=json"],"procedureAcquisition":null,"procedureCompositeProcess":"https://catalogue.ceda.ac.uk/api/v2/composites/44822/?format=json","procedureComputation":null,"permissions":[{"ob_id":"https://catalogue.ceda.ac.uk/api/v2/observations/2526/?format=json","useLimitation":null,"accessConstraints":null,"accessCategory":"public","accessRoles":null,"label":"public: None group","licenceURL":"http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/","licenceClassifications":"any, attribution required"}],"discoveryKeywords":[]}