Comparison of time-distance inversion methods applied to SDO/HMI Dopplergrams

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F19%3A00511456" target="_blank" >RIV/67985815:_____/19:00511456 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/19:10405024

Result on the web

<a href="https://doi.org/10.1051/0004-6361/201936268" target="_blank" >https://doi.org/10.1051/0004-6361/201936268</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201936268" target="_blank" >10.1051/0004-6361/201936268</a>

Result language

angličtina

Original language name

Comparison of time-distance inversion methods applied to SDO/HMI Dopplergrams

Original language description

We compared the results from the JSOC pipeline for horizontal flow components and the perturbations of the speed of sound at set of depths with equivalent results from an independently implemented pipeline using a different time-distance inversion scheme. Our inversion pipeline allows inversion for all quantities at once while allowing minimisation of the crosstalk between them. This gives us an opportunity to discuss the possible biases present in the JSOC data products. We successfully reproduced the horizontal flow components. The sound-speed perturbations are strongly affected by the high level of the cross-talk in JSOC products. This leads to larger amplitudes in the inversions for the sound-speed perturbations. Different results were obtained when a target function localised around the target depth was used. This is a consequence of non-localised JSOC averaging kernels. We add that our methodology also allows inversion for the vertical flow.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

<a href="/en/project/GA18-06319S" target="_blank" >GA18-06319S: Evolution of sunspots and active regions</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

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Volume of the periodical

629

Issue of the periodical within the volume

September

Country of publishing house

FR - FRANCE

Number of pages

26

Pages from-to

A55

UT code for WoS article

000483723900003

EID of the result in the Scopus database

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