A new GPS-based calibration of GRACE accelerometers using the arc-to-chord threshold uncovered sinusoidal disturbing signal

Abstract In order to guarantee an unbiased solution in accelerometer measurements, calibration parameters have been finally calculated without using any kind of regularization or constraint. In this paper, a better calibration of the GRACE accelerometers is achieved from the instantaneous GPS-based non-gravitational accelerations. The first derivatives of the precise-orbit velocity are computed under an a priori arc-to-chord threshold, while the modelled time-varying forces of gravitational origin and reference-system rotations are computed according to current conventions (including sub-daily tide variations). After subtracting the modelled time-varying gravity from the GPS-based accelerations, cross-track axes of both GRACE satellites seem to be affected by a periodic error of unknown source. With the purpose of extracting the underlying information from the resulting data, the systematic error is modelled and subtracted successfully. According to this approach, the resulting accelerations serve as a reliable reference for accelerometer calibration. © 2015 Elsevier Masson SAS.

Dergi Adı Aerospace Science and Technology
Dergi Cilt Bilgisi 45
Sayfalar 265 - 271
Yayın Yılı 2015
Eser Adı
[dc.title]
A new GPS-based calibration of GRACE accelerometers using the arc-to-chord threshold uncovered sinusoidal disturbing signal
Yazar
[dc.contributor.author]
Calabia A.
Yazar
[dc.contributor.author]
Jin S.
Yazar
[dc.contributor.author]
Tenzer R.
Yayın Yılı
[dc.date.issued]
2015
Yayıncı
[dc.publisher]
Elsevier Masson SAS
Yayın Türü
[dc.type]
article
Özet
[dc.description.abstract]
Abstract In order to guarantee an unbiased solution in accelerometer measurements, calibration parameters have been finally calculated without using any kind of regularization or constraint. In this paper, a better calibration of the GRACE accelerometers is achieved from the instantaneous GPS-based non-gravitational accelerations. The first derivatives of the precise-orbit velocity are computed under an a priori arc-to-chord threshold, while the modelled time-varying forces of gravitational origin and reference-system rotations are computed according to current conventions (including sub-daily tide variations). After subtracting the modelled time-varying gravity from the GPS-based accelerations, cross-track axes of both GRACE satellites seem to be affected by a periodic error of unknown source. With the purpose of extracting the underlying information from the resulting data, the systematic error is modelled and subtracted successfully. According to this approach, the resulting accelerations serve as a reliable reference for accelerometer calibration. © 2015 Elsevier Masson SAS.
Kayıt Giriş Tarihi
[dc.date.accessioned]
2019-12-23
Açık Erişim Tarihi
[dc.date.available]
2019-12-23
Yayın Dili
[dc.language.iso]
eng
Konu Başlıkları
[dc.subject]
Accelerometers
Konu Başlıkları
[dc.subject]
Calibration
Konu Başlıkları
[dc.subject]
Error analysis
Konu Başlıkları
[dc.subject]
Global Positioning System (GPS)
Konu Başlıkları
[dc.subject]
Low Earth Orbit (LEO) satellites
Haklar
[dc.rights]
info:eu-repo/semantics/closedAccess
ISSN
[dc.identifier.issn]
1270-9638
Sponsor YAYINCI
[dc.description.sponsorship]
Chinese Academy of Sciences National Natural Science Foundation of China: 11173050 National Natural Science Foundation of China: 11373059 Ministry of Science and Technology of the People's Republic of China: 973 Chinese Academy of Sciences: KJCX2-EW-T03
İlk Sayfa Sayısı
[dc.identifier.startpage]
265
Son Sayfa Sayısı
[dc.identifier.endpage]
271
Dergi Adı
[dc.relation.journal]
Aerospace Science and Technology
Dergi Cilt Bilgisi
[dc.identifier.volume]
45
Tek Biçim Adres
[dc.identifier.uri]
https://dx.doi.org/10.1016/j.ast.2015.05.013
Tek Biçim Adres
[dc.identifier.uri]
https://hdl.handle.net/20.500.12628/3974
Görüntülenme Sayısı ( Şehir )
Görüntülenme Sayısı ( Ülke )
Görüntülenme Sayısı ( Zaman Dağılımı )
Görüntülenme
7
09.12.2022 tarihinden bu yana
İndirme
1
09.12.2022 tarihinden bu yana
Son Erişim Tarihi
06 Şubat 2024 19:37
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Tıklayınız
accelerations calibration modelled accelerometer resulting GPS-based time-varying computed affected periodic satellites cross-track gravity subtracting variations) Masson unknown subtracted reference reliable approach According successfully systematic source Elsevier information underlying extracting (including purpose sub-daily Abstract conventions finally
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