Validation of Swarm accelerometer data by modelled nongravitational forces
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00478539" target="_blank" >RIV/67985815:_____/17:00478539 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.asr.2017.02.037" target="_blank" >http://dx.doi.org/10.1016/j.asr.2017.02.037</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.asr.2017.02.037" target="_blank" >10.1016/j.asr.2017.02.037</a>
Alternative languages
Result language
angličtina
Original language name
Validation of Swarm accelerometer data by modelled nongravitational forces
Original language description
Swarm is a three-satellite mission of the European Space Agency, in orbit since November 2013, whose main objective is the study of the Earth's magnetic field from space. As part of other scientific payload, each Swarm satellite is equipped with an accelerometer that measures the nongravitational forces (e.g. atmospheric drag and radiation pressure). Since the mission beginning, the Swarm onboard accelerometer observations have been facing a problem of much higher temperature influence than it had been anticipated in the prelaunch tests. In our paper, we use the a posteriori computed models of physical nongravitational forces acting on each satellite for external validation of the accelerometer measurements. To reduce the high temperature dependence, we apply a simple and straightforward method of linear temperature correction. The most successful application of this approach is for the along-track component of the accelerometer data, where the signal magnitude is strongest. The best performing accelerometer is that of the Swarm C satellite, the accelerometer of Swarm A displays more temperature dependence and noise, the noisiest accelerometer data set is provided by Swarm B. We analyzed the occurrence of anomalous periods in the along-track accelerometer component of Swarm A and Swarm C, when the number of accelerometer hardware anomalies is peaking. Over the time interval from June 2014 to December 2015, we found a correlation between these anomalous periods and the minima in the time-varying part of the modelled nongravitational signal.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - 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)
Result continuities
Project
<a href="/en/project/LG15003" target="_blank" >LG15003: Calibration of accelerometers onboard SWARM satellites by means of kinematic orbits and gravity field models</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Advances in Space Research
ISSN
0273-1177
e-ISSN
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Volume of the periodical
59
Issue of the periodical within the volume
10
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
2512-2521
UT code for WoS article
000401048900006
EID of the result in the Scopus database
2-s2.0-85015798210