This table is available for ADQL queries and through the TAP endpoint.
Resource Description:
GAIA-DEM
GAIA-DEM is a database of Differential Emission Measure (DEM) maps. The DEM is a
measure of the thermal structure of the coronal plasma, representing the quantity of
light emitting plasma along the line of sight, at different temperatures. In GAIA-DEM, the
DEM is modelled by a specific function of temperature, namely a Gaussian of the
logarithm of electron temperature. GAIA-DEM maps are then maps of the DEM
maximum temperature, of the DEM integral (total Emission Measure), and DEM width (in
temperature). These maps are obtained by inversion from the SDO/AIA EUV images in 6
coronal channels (9.4, 13.1, 17.1, 19.3, 21.1, and 33.5 nm). In addition, maps of the χ²
for the inversion are provided.
GAIA-DEM is available from a specific interface at
http://medoc-dem.ias.u-psud.fr, as
well as part of the generic MEDOC interface which is currently located at
https://idoc-medoc.ias.u-psud.fr.
These interfaces are based on the CNES SiTools2 framework.
GAIA-DEM is also available from IDL and Python scripts, using a specialization of the
generic SiTools2 IDL and Python clients developed by MEDOC.
For a list of all services and tables belonging to this table's resource, see Information on resource 'SDO GAIA-DEM'
Resource Reference URL: https://idoc-medoc.ias.u-psud.fr
To cite the table as such, we suggest the following BibTeX entry:
@MISC{vo:gaia_dem_epn_cor, year=2018, title={{SDO} {GAIA}-{DEM}}, author={{IDOC}: Integrated Data and Operating Center}, url={https://idoc-dachs.ias.u-psud.fr/tableinfo/gaia_dem.epn_core}, howpublished={{VO} resource provided by the {IDOC}: Integrated Data and Operating Center} }
Sorted alphabetically. [Sort by DB column index]
Name | Table Head | Description | Unit | UCD |
---|---|---|---|---|
access_estsize | Access_estsize | Estimated file size in kbyte. | kbyte | phys.size;meta.file |
access_format | Access_format | File format type (RFC 6838 Media Type a.k.a. MIME type) | N/A | meta.code.mime |
access_url | Access_url | URL of the data file, case sensitive. If present, then access_format and access_estsize are mandatory. | N/A | meta.ref.url;meta.file |
c1_resol_max | C1_resol_max | Resolution in the first coordinate, upper limit | deg | pos.angResolution;stat.max |
c1_resol_min | C1_resol_min | Resolution in the first coordinate, lower limit. | deg | pos.angResolution;stat.min |
c1max | C1max | Right Ascension (ICRS), upper limit | deg | pos.eq.ra;stat.max |
c1min | C1min | Right Ascension (ICRS), lower limit. | deg | pos.eq.ra;stat.min |
c2_resol_max | C2_resol_max | Resolution in the second coordinate, upper limit | deg | pos.angResolution;stat.max |
c2_resol_min | C2_resol_min | Resolution in the second coordinate, lower limit. | deg | pos.angResolution;stat.min |
c2max | C2max | Declination (ICRS), upper limit | deg | pos.eq.dec;stat.max |
c2min | C2min | Declination (ICRS), lower limit. | deg | pos.eq.dec;stat.min |
c3_resol_max | C3_resol_max | Resolution in the third coordinate, upper limit | AU | pos.resolution;stat.max |
c3_resol_min | C3_resol_min | Resolution in the third coordinate, lower limit. | AU | pos.resolution;stat.min |
c3max | C3max | Distance from coordinate origin, upper limit | AU | pos.distance;stat.max |
c3min | C3min | Distance from coordinate origin, lower limit. | AU | pos.distance;stat.min |
creation_date | Creation_date | Date of first entry of this granule | N/A | time.creation |
datalink_url | Datalink | Datalinks and services for this objet | N/A | meta.ref.url |
dataproduct_type | Dataproduct_type | The 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. [Note et_prod] | N/A | meta.code.class |
emergence_max | Emergence_max | Emergence angle during data acquisition, upper limit | deg | pos.emergenceAng;stat.max |
emergence_min | Emergence_min | Emergence angle during data acquisition, lower limit. | deg | pos.emergenceAng;stat.min |
file_name | File_name | Name of the data file only, case sensitive | N/A | meta.id;meta.file |
granule_gid | Granule_gid | Common to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric. | N/A | meta.id |
granule_uid | Granule_uid | Internal table row index, which must be unique within the table. Can be alphanumeric. | N/A | meta.id |
incidence_max | Incidence_max | Incidence angle (solar zenithal angle) during data acquisition, upper limit | deg | pos.incidenceAng;stat.max |
incidence_min | Incidence_min | Incidence angle (solar zenithal angle) during data acquisition, lower limit. | deg | pos.incidenceAng;stat.min |
instrument_host_name | Instrument_host_name | Standard name of the observatory or spacecraft | N/A | meta.id;instr.obsty |
instrument_name | Instrument_name | Standard name of instrument | N/A | meta.id;instr |
measurement_type | Measurement_type | UCD(s) defining the data, with multiple entries separated by hash (#) characters. | N/A | meta.ucd |
modification_date | Modification_date | Date of last modification (used to handle mirroring) | N/A | time.processing |
obs_id | Obs_id | Associates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation. | N/A | meta.id;obs |
phase_max | Phase_max | Phase angle during data acquisition, upper limit | deg | pos.phaseAng;stat.max |
phase_min | Phase_min | Phase angle during data acquisition, lower limit. | deg | pos.phaseAng;stat.min |
processing_level | Processing_level | Dataset-related encoding, or simplified CODMAC calibration level [Note et_cal] | N/A | meta.calibLevel |
publisher | Publisher | A short string identifying the entity running the data service used | N/A | meta.curation |
release_date | Release_date | Start of public access period | N/A | time.release |
s_region | S_region | ObsCore-like footprint, valid for celestial, spherical, or body-fixed frames | N/A | pos.outline;obs.field |
service_title | Service_title | Title of resource (an acronym really, will be used to handle multiservice results) | N/A | meta.title |
spatial_coordinate_description | Spatial_coordinate_description | ID of specific coordinate system and version / properties | N/A | meta.code.class;pos.frame |
spatial_frame_type | Spatial_frame_type | Flavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined. | N/A | meta.code.class;pos.frame |
spatial_origin | Defines the frame origin | meta.ref;pos.frame | N/A | meta.code.class;pos.frame |
spectral_range_max | Spectral_range_max | Spectral range (frequency), upper limit | Hz | em.freq;stat.max |
spectral_range_min | Spectral_range_min | Spectral range (frequency), lower limit. | Hz | em.freq;stat.min |
spectral_resolution_max | Spectral_resolution_max | Spectral resolution, upper limit | N/A | spect.resolution;stat.max |
spectral_resolution_min | Spectral_resolution_min | Spectral resolution, lower limit. | N/A | spect.resolution;stat.min |
spectral_sampling_step_max | Spectral_sampling_step_max | Spectral sampling step, upper limit | Hz | em.freq;spect.binSize;stat.max |
spectral_sampling_step_min | Spectral_sampling_step_min | Spectral sampling step, lower limit. | Hz | em.freq;spect.binSize;stat.min |
target_class | Target_class | Type of target, from a controlled vocabulary. | N/A | src.class |
target_distance_max | Target_distance_max | Max observer-target distance | km | pos.distance;stat.max |
target_distance_min | Target_distance_min | Min observer-target distance | km | pos.distance;stat.min |
target_name | Target_name | Standard IAU name of target (from a list related to target class), case sensitive | N/A | meta.id;src |
target_time_max | Target_time_max | Max observing time in target frame | N/A | time.end;src |
target_time_min | Target_time_min | Min observing time in target frame | N/A | time.start;src |
thumbnail_url | Thumbnail_url | URL of a thumbnail image with predefined size (png ~200 pix, for use in a client only) | N/A | meta.ref.url;meta.preview |
time_exp_max | Time_exp_max | Integration time of the measurement, upper limit | s | time.duration;obs.exposure;stat.max |
time_exp_min | Time_exp_min | Integration time of the measurement, lower limit. | s | time.duration;obs.exposure;stat.min |
time_max | Time_max | Acquisition stop time (in JD), as UTC at time_refposition | d | time.end;obs |
time_min | Time_min | Acquisition start time (in JD), as UTC at time_refposition | d | time.start;obs |
time_sampling_step_max | Time_sampling_step_max | Sampling time for measurements of dynamical phenomena, upper limit | s | time.resolution;stat.max |
time_sampling_step_min | Time_sampling_step_min | Sampling time for measurements of dynamical phenomena, lower limit. | s | time.resolution;stat.min |
Columns that are parts of indices are marked like this.
The following services may use the data contained in this table:
VO nerds may sometimes need VOResource XML for this table.
Copyright and such: