Naslov
Kinematic and Reduced-Dynamic Precise Orbit Determination of CHAMP satellite over one year using zero-differences

Autori
Švehla, Dražen ; Rothacher, M.

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
European Geophysical Society, Geophysical Research Abstracts, Vol. 5. / - Nica : European Geosciences Union (EGU), 2003

Skup
EGS-AGU-EUG Joint Assembly

Mjesto i datum
Nica, Francuska, 06.04.2003. - 11.04.2003

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
zero-difference GPS carrier-phase; SLR; DORIS; VLBI

Sažetak
Using zero­difference GPS carrier­phase measurements only, without any differenc­ ing in space or time domain, precise orbit determination (POD) of Low Earth Orbiters (LEO) can be performed. Among all space geodetic techniques (SLR, DORIS, VLBI, etc.) only GPS allows purely kinematic orbit determination where kinematic positions of the satellite are estimated independently of any force model or orbit altitude. Since the accuracy of the kinematic orbit determination depends only on the quality of the GPS measurements and the GPS orbit/clock accuracy, kinematic POD is an alternative to the classical dynamic or reduced­dynamic approach, where accuracy is limited by the quality of the dynamic models, e.g., gravity field, air­drag, solar radiation, etc. Highly accurate kinematic positions and kinematic velocities together with the variance­covariance information can be used as pseudo­observations in gravity field recovery and for the assessment of dynamical models in (reduced­)dynamic POD.

Izvorni jezik
Engleski

Znanstvena područja
Geodezija

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