Bibliografie VÚGTK
Estimation of the Length of Day (LOD) from DORIS observations
Štěpánek, Petr ; Filler, Vratislav ; Buday, Michal ; Hugentobler, Urs

Zdroj: Advances in Space Research : 62. (2), s.370-382 ISSN: 0273-1177

Typ publikace: článek v odborném periodiku
Rozsah: 13 stran

Anotace:
The paper is devoted to the estimation of the Length of the Day (LOD) from DORIS observations and summarizes the first successful experiment with LOD estimation at the level of geodetic precision. This result is confirmed by 9 years of DORIS data (2006.0 – 2015.0). The mean difference of the non smoothed LOD series with respect to the IERS C04 model reaches a value of tens μs and a standard deviation around 120 μs for the last years of the campaign 2012.0-2015.0. However, the mean difference with respect to the reference model varies over time, reaching negative values from -60 to -20 μs for the years 2006-2011 and positive values from 80 to 120 μs for the years 2012-2014. The time variable mean difference with respect to the changes in DORIS satellite constellation is discussed, as well as the possibility of the bias reduction applying the long-term averages of the cross-track harmonics or adjustment of the geopotential coefficient C20. Moreover, the possibility of LOD adjustment in the standard DORIS solution is discussed with focus on the station coordinates estimation. In addition, the power spectrum of the difference between estimated LOD and the reference model was performed, showing the domination of the annual signal. Also LOD estimated from single-satellite DORIS solutions was analyzed to identify satellite-specific issues. The paper includes a correlation analysis of the orbit parameters, Earth rotation parameters and the geopotential coefficient C20, based on covariance matrices from weekly solutions. High correlation around 0.96 was found for LOD and the sine amplitude of the cross-track harmonic empirical acceleration, which was also confirmed analytically.

Citace: ŠTĚPÁNEK, Petr, Vratislav FILLER, Michal BUDAY a Urs HUGENTOBLER. Estimation of the Length of Day (LOD) from DORIS observations. Advances in Space Research. Nizozemsko: Elsevier, 2018, 62(2), 370-382. DOI: 10.1016/j.asr.2018.04.038. ISSN 0273-1177. Dostupné také z: https://www.sciencedirect.com/science/article/pii/S0273117718303703?via%3Dihub

Záznam se nachází v těchto sbírkách:
Výsledky VÚGTK > Vědečtí pracovníci VÚGTK > Ing. Petr Štěpánek, Ph.D.
Výsledky VÚGTK > Vědečtí pracovníci VÚGTK > Ing. Vratislav Filler, Ph.D.
Výsledky VÚGTK > Podle útvarů / oddělení > 24: Geodézie a geodynamika
Dokumentační centrum VÚGTK > Články VÚGTK
Výsledky VÚGTK > Výsledky RIV

 Záznam vytvořen 2019-08-14, poslední editace 2019-08-14



Hodnotit tento dokument:

Rate this document:
1
2
3
 
(Ještě nerecenzováno)