Information on Service 'Experimental SST/SSTRED Data Access'

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Further access options are discussed below

Simple service for accessing the SST/SSTRED data, Vizier-like date search on DATE-BEG.

For a list of all services and tables belonging to this service's resource, see Information on resource 'Observations of the Sun by CRISP, CRISP2, or CHROMIS on the SST'

Service Documentation

Details

The data available here are observations from the Swedish 1-meter Solar telescope (SST), using the imaging spectro(polari)meters CRISP, CRISP2, and CHROMIS. The data products are science-ready data cubes in FITS files, produced by running the SSTRED data processing pipeline.

The FITS files are all 5-dimensional, where the dimensions are [spatial, spatial, spectral, Stokes, repeat], although depending on the observing program or processing details, any of the latter three dimensions can be of length unity.

The WCS coordinates are tabulated (except for the Stokes coordinate).

References

Overview

You can access this service using:

This service is published as follows:

local means it is listed on our front page, ivo_managed means it has a record in the VO registry.

Input Fields

The following fields are available to provide input to the service (with some renderers, some of these fields may be unavailable):

NameTable Head DescriptionUnitUCD
date_beg DATE-BEG Observation start time (UTC) N/A time.start

Default Output Fields

The following fields are contained in the output by default. More fields may be available for selection; these would be given below in the VOTable output fields.

NameTable Head DescriptionUnitUCD
access_url Data Access N/A N/A N/A
date_beg DATE-BEG N/A N/A N/A
granule_uid Granule ID N/A N/A N/A
thumbnail_url Thumbnail N/A N/A meta.ref.url

VOTable Output Fields

The following fields are available in VOTable output. The verbosity level is a number intended to represent the relative importance of the field on a scale of 1 to 30. The services take a VERB argument. A field is included in the output if their verbosity level is less or equal VERB*10.

NameTable Head DescriptionUnitUCD Verb. Level
pol_xel |Pol| Number of elements (typically pixels) along the polarization axis. N/A meta.number 10
pol_states Pol. States List of polarization states in the data set N/A meta.code;phys.polarization 15
granule_uid Granule_uid Internal table row index, which must be unique within the table. Can be alphanumeric. N/A meta.id 20
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 20
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 20
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 20
target_name Target_name Standard IAU name of target (from a list related to target class), case sensitive N/A meta.id;src 20
target_class Target_class Type of target, from a controlled vocabulary. N/A src.class 20
time_min Time_min Acquisition start time (in JD), as UTC at time_refposition d time.start;obs 20
time_max Time_max Acquisition stop time (in JD), as UTC at time_refposition d time.end;obs 20
time_sampling_step_min Time_sampling_step_min Sampling time for measurements of dynamical phenomena, lower limit. s time.resolution;stat.min 20
time_sampling_step_max Time_sampling_step_max Sampling time for measurements of dynamical phenomena, upper limit s time.resolution;stat.max 20
time_exp_min Time_exp_min Integration time of the measurement, lower limit. s time.duration;obs.exposure;stat.min 20
time_exp_max Time_exp_max Integration time of the measurement, upper limit s time.duration;obs.exposure;stat.max 20
spectral_range_min Spectral_range_min Spectral range (frequency), lower limit. Hz em.freq;stat.min 20
spectral_range_max Spectral_range_max Spectral range (frequency), upper limit Hz em.freq;stat.max 20
spectral_sampling_step_min Spectral_sampling_step_min Spectral sampling step, lower limit. Hz em.freq;spect.binSize;stat.min 20
spectral_sampling_step_max Spectral_sampling_step_max Spectral sampling step, upper limit Hz em.freq;spect.binSize;stat.max 20
spectral_resolution_min Spectral_resolution_min Spectral resolution, lower limit. N/A spect.resolution;stat.min 20
spectral_resolution_max Spectral_resolution_max Spectral resolution, upper limit N/A spect.resolution;stat.max 20
c1min C1min Right Ascension (ICRS), lower limit. deg pos.eq.ra;stat.min 20
c1max C1max Right Ascension (ICRS), upper limit deg pos.eq.ra;stat.max 20
c2min C2min Declination (ICRS), lower limit. deg pos.eq.dec;stat.min 20
c2max C2max Declination (ICRS), upper limit deg pos.eq.dec;stat.max 20
c3min C3min Distance from coordinate origin, lower limit. AU pos.distance;stat.min 20
c3max C3max Distance from coordinate origin, upper limit AU pos.distance;stat.max 20
s_region S_region ObsCore-like footprint, valid for celestial, spherical, or body-fixed frames N/A pos.outline;obs.field 20
c1_resol_min C1_resol_min Resolution in the first coordinate, lower limit. deg pos.angResolution;stat.min 20
c1_resol_max C1_resol_max Resolution in the first coordinate, upper limit deg pos.angResolution;stat.max 20
c2_resol_min C2_resol_min Resolution in the second coordinate, lower limit. deg pos.angResolution;stat.min 20
c2_resol_max C2_resol_max Resolution in the second coordinate, upper limit deg pos.angResolution;stat.max 20
c3_resol_min C3_resol_min Resolution in the third coordinate, lower limit. AU pos.resolution;stat.min 20
c3_resol_max C3_resol_max Resolution in the third coordinate, upper limit AU pos.resolution;stat.max 20
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 20
incidence_min Incidence_min Incidence angle (solar zenithal angle) during data acquisition, lower limit. deg pos.incidenceAng;stat.min 20
incidence_max Incidence_max Incidence angle (solar zenithal angle) during data acquisition, upper limit deg pos.incidenceAng;stat.max 20
emergence_min Emergence_min Emergence angle during data acquisition, lower limit. deg pos.emergenceAng;stat.min 20
emergence_max Emergence_max Emergence angle during data acquisition, upper limit deg pos.emergenceAng;stat.max 20
phase_min Phase_min Phase angle during data acquisition, lower limit. deg pos.phaseAng;stat.min 20
phase_max Phase_max Phase angle during data acquisition, upper limit deg pos.phaseAng;stat.max 20
instrument_host_name Instrument_host_name Standard name of the observatory or spacecraft N/A meta.id;instr.obsty 20
instrument_name Instrument_name Standard name of instrument N/A meta.id;instr 20
measurement_type Measurement_type UCD(s) defining the data, with multiple entries separated by hash (#) characters. N/A meta.ucd 20
processing_level Processing_level Dataset-related encoding, or simplified CODMAC calibration level Note et_cal N/A meta.calibLevel 20
creation_date Creation_date Date of first entry of this granule N/A time.creation 20
modification_date Modification_date Date of last modification (used to handle mirroring) N/A time.processing 20
release_date Release_date Start of public access period N/A time.release 20
service_title Service_title Title of resource (an acronym really, will be used to handle multiservice results) N/A meta.title 20
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 20
access_format Access_format File format type (RFC 6838 Media Type a.k.a. MIME type) N/A meta.code.mime 20
access_estsize Access_estsize Estimated file size in kbyte. kbyte phys.size;meta.file 20
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 20
file_name File_name Name of the data file only, case sensitive N/A meta.id;meta.file 20
publisher Publisher A short string identifying the entity running the data service used N/A meta.curation 20
bib_reference Bib_reference Bibcode or DOI preferred if available, or other bibliographic identifier or URL N/A meta.bib 20
filter Filter Identifies filter in use, typically for images N/A meta.id;instr.filter 20
spatial_coordinate_description Spatial_coordinate_description ID of specific coordinate system and version or properties. N/A meta.code.class;pos.frame 20
spatial_origin Spatial_origin Defines the frame origin N/A meta.ref;pos.frame 20
time_scale Time_scale Defaults to UTC in data services; takes values from http://www.ivoa.net/rdf/time_scale otherwise N/A time.scale 20
obs_mode Obs_mode Observing mode N/A meta.code;instr.setup 20
orientation Orientation Position angle of an image y-axis, in direct sense from north deg pos.posAng 20
date_beg DATE-BEG Observation start time (UTC) N/A time.start 20

VOResource XML (that's something exclusively for VO nerds)

Note et_cal

CODMAC levels are:

1 -- raw

2 -- edited

3 -- calibrated

4 -- resampled

5 -- derived

6 -- ancillary

Note et_prod

The following values are defined for this field:

im -- image
associated scalar fields with two spatial axes, e.g., images with multiple color planes like from multichannel or filter cameras. Preview images (e.g. map with axis and caption) also belong here. Conversely, all vectorial 2D fields are described as catalogue (see below).
ma -- map
scalar field/rasters with two spatial axes covering a large area and projected either on the sky or on a planetary body, associated to a Projection parameter (with a short enumerated list of possible values). This is mostly intended to identify complete coverages that can be used as reference basemaps.
sp-- spectrum
measurements organized primarily along a spectral axis, e.g., radiance spectra. This includes spectral aggregates (series of related spectra with non-connected spectral ranges, e.g., from several channels of the same instrument
ds -- dynamic spectrum
consecutive spectral measurements through time, organized as a time series. This typically implies successive spectra of the same target or field of view.
sc -- spectral cube
sets of spectral measurements with 1 or 2 D spatial coverage, e.g., imaging spectroscopy. The choice between Image and spectral_cube is related to the characteristics of the instrument (which dimension is most resolved and which dimensions are acquired simultaneously). The choice between dynamic_spectrum and spectral_cube is related to the uniformity of the field of view.
pr -- profile
scalar or vectorial measurements along 1 spatial dimension, e.g., atmospheric profiles, atmospheric paths, sub-surface profiles, traverses…
pf -- photometric profile
scalar or vectorial measurements along 1 angular dimension, e.g., phase or polarization curves, phase functions, emission-phase function sequences… typically associated to variations in illumination angle parameters.
vo -- volume
other measurements with 3 spatial dimensions, e.g., internal or atmospheric structures, including shells/shape models (3D surfaces).
mo -- movie
sets of chronological 2 D spatial measurements.
cu -- cube
multidimensional data with 3 or more axes, e.g., all that is not described by other 3 D data types such as spectral cubes or volume. This is mostly intended to accommodate unusual data with multiple dimensions.
ts -- time series
measurements organized primarily as a function of time (with exception of dynamical spectra and movies, i.e. usually a scalar quantity). Typical examples of time series include space-borne dust detector measurements, daily or seasonal curves measured at a given location (e.g., a lander), and light curves.
ca -- catalog
applies to a single granule providing a list of events, a catalog of object parameters, a list of features… It is good practice to describe the type of data included in the catalogue using a hash-separated-list (e.g., a table of spectra should be described by ca#sp, so that it will respond to a query for spectra).
ci -- catalogue item
applies when the service itself provides a catalogue, with entries described as individual granules. The service can be, e.g., a list of asteroid properties or spectral lines. Catalogue_item can be limited to scalar quantities (including strings), and possibly to a single element. This organization allows the user to search inside the catalogue from the TAP query interface.
sv -- spatial vector
vector information associated to localization, such as spatial footprints or a GIS-related element. This could contain a kml or geojson file (STC-S strings are provided though the s_region parameter, though). This includes maps of vectors, e.g., wind maps.
ev -- event
individual events, typically formatted in VOEvent. Characteristics are provided via the event_* parameters.