Assessment of chosen GRACE related gravity models based on the GOCE satellite precise science orbit

• Autorzy: Bobojć Andrzej

Identyfikatory

DOI

10.1007/s11600-019-00317-y

• Języki publikacji: EN

Abstrakty

EN

Eight selected geopotential models obtained through the International Center for Global Earth Models were used in the dynamic orbit determination process of the satellite of the Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) mission. For the estimation of various GOCE orbital arc variants, the following gravity models were taken into account: HUST-GRACE2016S, ITU_GRACE16, ITSG-GRACE2014S, ITSG-GRACE2014K, TONGJI-GRACE01, EIGEN-51C, EIGEN5S, EGM2008. The ofcial kinematic and reduced-dynamic precise science orbit (PSO) of the GOCE satellite received via the European Space Agency was adopted as the reference orbit. Cartesian coordinates of the GOCE satellite in this orbit were treated as pseudo-observations in the estimation process using the classical least-squares method. The estimated orbital arcs were ftted to the corresponding arcs of the reference orbit. This allowed the values of 3D root-mean-square (RMS) of the distance between the estimated and reference arcs to be computed. The averages for these 3D RMS values, computed for ten and ffty orbital arcs, made it possible to compare the orbital performance of selected gravity models. Additionally, the ft to both types of the GOCE PSO, i.e., the kinematic orbit and the reduced-dynamic orbit made it possible to compare their quality. Investigation of the gravity model performance was also the opportunity to describe the efectiveness of dynamic orbit determination solutions, depending on the estimated arc lengths, type of reference orbit and the use (or not) of the background models.

Słowa kluczowe

EN

dynamic orbit determination; GRACE gravity models; GOCE Precise Science Orbit

PL

wyznaczanie orbity dynamiczne

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2019
• Tom: Vol. 67, no. 4
• Strony: 1265--1275
• Opis fizyczny: Bibliogr. 38 poz.

Twórcy

autor

Bobojć Andrzej

• Institute of Geodesy, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).