omega_cubes.epn_ivo://idoc/psup/omega_cubes/q/epn_coreIDOCIDOC2026-02-06T13:39:17ZFrançois Poulet

Institut d'Astrophysique Spatiale - Orsay - France

idoc-psup@ias.u-psud.frmarsMars Express - Omega Cubeshttps://idoc-dachs.ias.u-psud.fr/tableinfo/omega_cubes.epn_coreGeneralUniversityResearchAmateurIsServedByIDOC: Integrated Data and Operating Center TAP servicehttps://idoc-dachs.ias.u-psud.fr/tapomega_cubes *** PSUP Omega Cubes *** The database contains all the OMEGA observations acquired with the C channel. Filtering processes have been implemented to remove some instrumental artefacts and observational conditions. OMEGA C channel data cubes are corrected for atmospheric and aerosol contributions. OMEGA is the spectro-imaging instrument of the ESA Mars-Express mission, inserted on the martian orbit the 25th of December 2003. The Observatories of Paris Sud (OSUPS) and Lyon (OSUL) have implemented a portal,called PSUP (Planetary SUrface Portal), for providing users with efficient and easy access to data products dedicated to the Martian surface. *** Scientific interest ***omega_cubes.epn_coreMars Express - Omega Cubesivo://ivoa.net/std/epntap#table-2.0granule_uidInternal table row index, which must be unique within the table. Can be alphanumeric.meta.idcharindexedprimarygranule_gidCommon to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric.meta.idcharobs_idAssociates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation.meta.id;obschardataproduct_typeThe high-level organization of the data product, from a controlled vocabulary (e.g., 'im' for image, sp for spectrum). Multiple terms may be used, separated by # characters.meta.code.classcharnullabletarget_nameStandard IAU name of target (from a list related to target class), case sensitivemeta.id;srccharnullabletarget_classType of target, from a controlled vocabulary.src.classcharnullabletime_minAcquisition start time (in JD), as UTC at time_refpositiondtime.start;obsdoublenullabletime_maxAcquisition stop time (in JD), as UTC at time_refpositiondtime.end;obsdoublenullabletime_sampling_step_minSampling time for measurements of dynamical phenomena, lower limit.stime.resolution;stat.mindoublenullabletime_sampling_step_maxSampling time for measurements of dynamical phenomena, upper limitstime.resolution;stat.maxdoublenullabletime_exp_minIntegration time of the measurement, lower limit.stime.duration;obs.exposure;stat.mindoublenullabletime_exp_maxIntegration time of the measurement, upper limitstime.duration;obs.exposure;stat.maxdoublenullablespectral_range_minSpectral range (frequency), lower limit.Hzem.freq;stat.mindoublenullablespectral_range_maxSpectral range (frequency), upper limitHzem.freq;stat.maxdoublenullablespectral_sampling_step_minSpectral sampling step, lower limit.Hzem.freq;spect.binSize;stat.mindoublenullablespectral_sampling_step_maxSpectral sampling step, upper limitHzem.freq;spect.binSize;stat.maxdoublenullablespectral_resolution_minSpectral resolution, lower limit.spect.resolution;stat.mindoublenullablespectral_resolution_maxSpectral resolution, upper limitspect.resolution;stat.maxdoublenullablec1minLongitude on body, lower limit.degpos.bodyrc.lon;stat.mindoublenullablec1maxLongitude on body, upper limitdegpos.bodyrc.lon;stat.maxdoublenullablec2minLatitude on body, lower limit.degpos.bodyrc.lat;stat.mindoublenullablec2maxLatitude on body, upper limitdegpos.bodyrc.lat;stat.maxdoublenullablec3minAltitude from reference surface, lower limit.kmpos.bodyrc.alt;stat.mindoublenullablec3maxAltitude from reference surface, upper limitkmpos.bodyrc.alt;stat.maxdoublenullables_regionObsCore-like footprint, valid for celestial, spherical, or body-fixed framespos.outline;obs.fieldcharnullablec1_resol_minResolution in the first coordinate, lower limit.degpos.angResolution;stat.mindoublenullablec1_resol_maxResolution in the first coordinate, upper limitdegpos.angResolution;stat.maxdoublenullablec2_resol_minResolution in the second coordinate, lower limit.degpos.angResolution;stat.mindoublenullablec2_resol_maxResolution in the second coordinate, upper limitdegpos.angResolution;stat.maxdoublenullablec3_resol_minResolution in the third coordinate, lower limit.kmpos.resolution;stat.mindoublenullablec3_resol_maxResolution in the third coordinate, upper limitkmpos.resolution;stat.maxdoublenullablespatial_frame_typeFlavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined.meta.code.class;pos.framecharnullableincidence_minIncidence angle (solar zenithal angle) during data acquisition, lower limit.degpos.incidenceAng;stat.mindoublenullableincidence_maxIncidence angle (solar zenithal angle) during data acquisition, upper limitdegpos.incidenceAng;stat.maxdoublenullableemergence_minEmergence angle during data acquisition, lower limit.degpos.emergenceAng;stat.mindoublenullableemergence_maxEmergence angle during data acquisition, upper limitdegpos.emergenceAng;stat.maxdoublenullablephase_minPhase angle during data acquisition, lower limit.degpos.phaseAng;stat.mindoublenullablephase_maxPhase angle during data acquisition, upper limitdegpos.phaseAng;stat.maxdoublenullableinstrument_host_nameStandard name of the observatory or spacecraftmeta.id;instr.obstycharnullableinstrument_nameStandard name of instrumentmeta.id;instrcharnullablemeasurement_typeUCD(s) defining the data, with multiple entries separated by hash (#) characters.meta.ucdcharnullableprocessing_levelDataset-related encoding, or simplified CODMAC calibration levelmeta.calibLevelintcreation_dateDate of first entry of this granuletime.creationcharnullablemodification_dateDate of last modification (used to handle mirroring)time.processingcharnullablerelease_dateStart of public access periodtime.releasecharnullableservice_titleTitle of resource (an acronym really, will be used to handle multiservice results)meta.titlecharnullableaccess_urlURL of the data file, case sensitive. If present, then access_format and access_estsize are mandatory.meta.ref.url;meta.filecharnullableaccess_formatFile format type (RFC 6838 Media Type a.k.a. MIME type)meta.code.mimecharnullableaccess_estsizeEstimated file size in kbyte.kbytephys.size;meta.fileintnullablefile_nameName of the data file only, case sensitivemeta.id;meta.filecharnullablepublisherA short string identifying the entity running the data service usedmeta.curationcharnullableorbit_numberThe martian orbit number.meta.idshortcube_numberThe cube number on the specified orbit_number, depends on pixel numbers before projection.meta.idshortaltitude_minThe miminum altitude (in m) (MOLA ? ellipsoid as reference).mpos.bodyrc.alt;stat.minfloataltitude_maxThe maximum altitude (in m) (MOLA ? ellipsoid as reference).mpos.bodyrc.alt;stat.maxfloatwatericelin_minThe minimum watericelin index value. This criterion, described in Langevin et al. (2007) is based on the 1.5 ?m band depth. It can be used to detect icy frost presence at the surface and thick clouds in the atmosphere. Every OMEGA pixel with a watericelin value > 1.5% should be excluded.meta.id;stat.minfloatwatericelin_maxThe maximum watericelin index value. This criterion, described in Langevin et al. (2007) is based on the 1.5 ?m band depth. It can be used to detect icy frost presence at the surface and thick clouds in the atmosphere. Every OMEGA pixel with a watericelin value > 1.5% should be excluded.meta.id;stat.maxfloaticecloud_index_minThe minimum icecloud index. This criterion (reflectance at 3.4 ?m divided by reflectance at 3.52 ?m) is described in Langevin et al. (2007) to identify the presence of water ice clouds. Its values range from 0.5 to 1.0. The smallest values unambiguously indicate the presence of icy clouds. We usually exclude any OMEGA pixel with a value strictly inferior to 0.8.meta.id;stat.minfloaticecloud_index_maxThe maximum icecloud index. This criterion (reflectance at 3.4 ?m divided by reflectance at 3.52 ?m) is described in Langevin et al. (2007) to identify the presence of water ice clouds. Its values range from 0.5 to 1.0. The smallest values unambiguously indicate the presence of icy clouds. We usually exclude any OMEGA pixel with a value strictly inferior to 0.8.meta.id;stat.maxfloattau_minThe minimum effective dust opacity at a given longitude and latitude as τeff = τMER/cos i, where i is the solar incidence angle and τMER is the dust opacity measured by the Mars Exploration Rovers (MERs) during the same solar longitude and Martian year as the OMEGA observation (see Audouard et al. J. Geophys. Res. Planets, 119, 1969–1989 for more details).meta.id;stat.minfloattau_maxThe maximum effective dust opacity at a given longitude and latitude as τeff = τMER/cos i, where i is the solar incidence angle and τMER is the dust opacity measured by the Mars Exploration Rovers (MERs) during the same solar longitude and Martian year as the OMEGA observation (see Audouard et al. J. Geophys. Res. Planets, 119, 1969–1989 for more details).meta.id;stat.maxfloat