<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Dear colleagues, <div class=""><br class=""></div><div class="">here is another VEP for the product-type vocabulary. </div><div class=""><br class=""></div><div class="">We propose a new term: #dynamic-spectrum</div><div class=""><br class=""></div><div class="">See here for details:</div><div class=""><a href="http://volute.g-vo.org/svn/trunk/projects/semantics/veps/VEP-008.txt" class="">http://volute.g-vo.org/svn/trunk/projects/semantics/veps/VEP-008.txt</a></div><div class=""><br class=""></div><div class="">I copy the initial proposed content below.</div><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Baptiste</div><div class=""><br class=""></div><div class=""><br class=""></div><div class="">———————</div><div class=""><br class=""></div><div class=""><pre style="word-wrap: break-word; white-space: pre-wrap;" class="">Vocabulary: <a href="http://www.ivoa.net/rdf/product-type" class="">http://www.ivoa.net/rdf/product-type</a>
Authors: Baptiste Cecconi <<a href="mailto:baptiste.cecconi@obspm.fr" class="">baptiste.cecconi@obspm.fr</a>>, Yan Grange <<a href="mailto:grange@astron.nl" class="">grange@astron.nl</a>>
Date: 2021-06-16
New Term: #dynamic-spectrum
Action: Addition
Label: Dynamic Spectrum
Description: Consecutive spectral measurements through time,
organized as a time series of successive spectra of the same
target or field of view.
Relationships: rdfs:subPropertyOf(two-d-array)
Used-in: <a href="http://vogate.obs-nancay.fr/tableinfo/nda.epn_core" class="">http://vogate.obs-nancay.fr/tableinfo/nda.epn_core</a>
Used-in: <a href="http://dorotka.ufa.cas.cz/tableinfo/thmsm.epn_core" class="">http://dorotka.ufa.cas.cz/tableinfo/thmsm.epn_core</a>
Used-in: <a href="http://cdpp-epntap.irap.omp.eu/tableinfo/amdadb.epn_core" class="">http://cdpp-epntap.irap.omp.eu/tableinfo/amdadb.epn_core</a>
To-be-used-in: <a href="https://vo.astron.nl/browse/__system__/obscore" class="">https://vo.astron.nl/browse/__system__/obscore</a>
Rationale:
The term #dynamic-spectrum is mostly use in low frequency radio
astronomy. A #dynamic-spectrum data product is a 2D product, with
a time axis and a spectral axis. Community-specific clients can
use this term to select adequate plotting style (such as, e.g.,
the "waterfall" style). In TOPCAT, the corresponding plotting
style would be the "spectrogram" option of its "Time Plot" window.
NB: The EPNcore short name for #dynamic-spectrum is `ds`. </pre><div class=""><br class=""></div></div></body></html>