Decametric radio observation from Nancay decameter array. The Nancay
Decameter Array (NDA) at the Station de Radioastronomie de Nancay
(SRN) is a phased array of 144 "Teepee" helicoidal antenna, half of
which being Right Handed (RH) polarized and the other half being Left
Handed (LH) polarized. Four receivers are currently connected to the
NDA, sampling data in spectral ranges within 5 to 80 MHz.EPN-TAP Decametric radio observation from Nancay decameter array. The Nancay
Decameter Array (NDA) at the Station de Radioastronomie de Nancay
(SRN) is a phased array of 144 "Teepee" helicoidal antenna, half of
which being Right Handed (RH) polarized and the other half being Left
Handed (LH) polarized. Four receivers are currently connected to the
NDA, sampling data in spectral ranges within 5 to 80 MHz. A. Lecacheux, The Nancay Decameter Array: A Useful Step Towards
Giant, New Generation Radio Telescopes for Long Wavelength Radio
Astronomy, in Radio Astronomy at Long Wavelengths, eds. R. G. Stone,
K. W. Weiler, M. L. Goldstein, and J.-L. Bougeret, AGU Geophys.
Monogr. Ser., 119, 321, 2000.Query successfulThis resource contains data associated with the publication 2000GMS...119..321LFor advice on how to cite the resource(s) that contributed to this result, see http://vogate.obs-nancay.fr/tableinfo/nda.epn_core#ti-citingMore information on a resource that contributed to this data is found at http://vogate.obs-nancay.fr/tableinfo/nda.epn_core
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.
CODMAC levels are:
1 -- raw
2 -- edited
3 -- calibrated
4 -- resampled
5 -- derived
6 -- ancillaryInternal table row index, which must be unique within the table. Can be alphanumeric.Common to granules of same type (e.g. same map projection, or geometry data products). Can be alphanumeric.Associates granules derived from the same data (e.g. various representations/processing levels). Can be alphanumeric, may be the ID of original observation.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.Standard IAU name of target (from a list related to target class), case sensitiveType of target, from a controlled vocabulary.Acquisition start time (in JD), as UTC at time_refpositionAcquisition stop time (in JD), as UTC at time_refpositionSampling time for measurements of dynamical phenomena, lower limit.Sampling time for measurements of dynamical phenomena, upper limitIntegration time of the measurement, lower limit.Integration time of the measurement, upper limitSpectral range (frequency), lower limit.Spectral range (frequency), upper limitSpectral sampling step, lower limit.Spectral sampling step, upper limitSpectral resolution, lower limit.Spectral resolution, upper limitLongitude on body, lower limit.Longitude on body, upper limitLatitude on body, lower limit.Latitude on body, upper limitAltitude from reference surface, lower limit.Altitude from reference surface, upper limitObsCore-like footprint, valid for celestial, spherical, or body-fixed framesResolution in the first coordinate, lower limit.Resolution in the first coordinate, upper limitResolution in the second coordinate, lower limit.Resolution in the second coordinate, upper limitResolution in the third coordinate, lower limit.Resolution in the third coordinate, upper limitFlavor of coordinate system, defines the nature of coordinates. From a controlled vocabulary, where 'none' means undefined.Incidence angle (solar zenithal angle) during data acquisition, lower limit.Incidence angle (solar zenithal angle) during data acquisition, upper limitEmergence angle during data acquisition, lower limit.Emergence angle during data acquisition, upper limitPhase angle during data acquisition, lower limit.Phase angle during data acquisition, upper limitStandard name of the observatory or spacecraftStandard name of instrumentUCD(s) defining the data, with multiple entries separated by hash (#) characters.Dataset-related encoding, or simplified CODMAC calibration levelDate of first entry of this granuleDate of last modification (used to handle mirroring)Start of public access periodTitle of resource (an acronym really, will be used to handle multiservice results)URL of the data file, case sensitive. If present, then access_format and access_estsize are mandatory.File format type (RFC 6838 Media Type a.k.a. MIME type)Estimated file size in kbyte.Defaults to UTC in data services; takes values from http://www.ivoa.net/rdf/time_scale otherwiseMD5 Hash for the fileURL of a thumbnail image with predefined size (png ~200 pix, for use in a client only)Identifies a chemical species, case sensitiveA short string identifying the entity running the data service usedBibcode or DOI preferred if available, or other bibliographic identifier or URLType of region or feature of interestSecondary name (can be standard name of region of interest)Receiver name used with the instrument.Access key for the dataOwner of the dataDate the data will become/became publicMIME type of the file servedSize of the data in bytesDatalinks and services for this objectB-W Preview PDF fileColor Preview PDF fileB-W Preview PNG fileColor Preview PNG fileB-W Thumbnail PNG fileColor Thumbnail PNG fileRaw format parent file (RT1)
A Datalink service to retrieve the data set as well as additional related files, plus possibly services for server-side processing.