Assessment of Systematic Errors in the Computation of Gravity Gradients from Satellite Altimeter Data

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F11%3A00373768" target="_blank" >RIV/67985815:_____/11:00373768 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1080/01490419.2010.518498" target="_blank" >http://dx.doi.org/10.1080/01490419.2010.518498</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/01490419.2010.518498" target="_blank" >10.1080/01490419.2010.518498</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Assessment of Systematic Errors in the Computation of Gravity Gradients from Satellite Altimeter Data

Popis výsledku v původním jazyce

We show that some of the systematic errors cannot be neglected. In particular, we found that the negligence of the dynamic ocean topography (DOT) may introduce errors that are greater than the measurement noise induced errors. If the gravity gradients are to be used for GOCE validation, then also in this case the DOT may not be neglected as the signal at GOCE altitude of 260 km may be above the GOCE requirements. In addition, we show that the altimetry derived gravity gradients cannot be compared one-to-one with those in a local Cartesian frame. The differences are small compared with the total signal, but they may be larger than the satellite altimetry induced stochastic errors and may be above the GOCE requirements. The cubic splines second derivative truncation error requires the use of 10 Hz altimeter data for the computation of gravity gradients at the Earth's surface, while 1 Hz data are sufficient for validation at GOCE altitude.

Název v anglickém jazyce

Assessment of Systematic Errors in the Computation of Gravity Gradients from Satellite Altimeter Data

Popis výsledku anglicky

We show that some of the systematic errors cannot be neglected. In particular, we found that the negligence of the dynamic ocean topography (DOT) may introduce errors that are greater than the measurement noise induced errors. If the gravity gradients are to be used for GOCE validation, then also in this case the DOT may not be neglected as the signal at GOCE altitude of 260 km may be above the GOCE requirements. In addition, we show that the altimetry derived gravity gradients cannot be compared one-to-one with those in a local Cartesian frame. The differences are small compared with the total signal, but they may be larger than the satellite altimetry induced stochastic errors and may be above the GOCE requirements. The cubic splines second derivative truncation error requires the use of 10 Hz altimeter data for the computation of gravity gradients at the Earth's surface, while 1 Hz data are sufficient for validation at GOCE altitude.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Marine geodesy

ISSN

0149-0419

e-ISSN

—

Svazek periodika

34

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

23

Strana od-do

85-107

Kód UT WoS článku

000290668300001

EID výsledku v databázi Scopus

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