Abstract's details
Construction of GPS-based LEO orbits referenced to the “instantaneous” Earth’s center of mass, through the adjustment of a parametric correction in the IGS GPS satellite clock solutions
CoAuthors
Event: 2017 Ocean Surface Topography Science Team Meeting
Session: Precision Orbit Determination
Presentation type: Type Oral
Contribution: not provided
Abstract:
The International GNSS Service (IGS) solutions for the GPS constellation are aligned to the ITRF origin. This strategy is not sufficient to model correctly the LEO GPS measurements, because the geocenter motion is not taken into account for the ground station positions in these solutions. As a consequence, the clock products are slightly biased in order to represent directly a convenient ITRF positioning for the users. All Analysis Centers (AC) follow this recommendation to align their solution to conform to the ITRF origin.
In order to be consistent with the dynamic motion of a LEO satellite, and also to be consistent with the other measurement systems where the geocenter motion is modelled (SLR and DORIS, annual part in the current GDR-E standards), it is necessary to take into account or to mitigate the miscentering effect of the constellation solution.
In this paper, we use a parametric model representing the reference network translations, and this model is adjusted in the Jason-2 LEO satellite orbit determination.
In order to be consistent with the dynamic motion of a LEO satellite, and also to be consistent with the other measurement systems where the geocenter motion is modelled (SLR and DORIS, annual part in the current GDR-E standards), it is necessary to take into account or to mitigate the miscentering effect of the constellation solution.
In this paper, we use a parametric model representing the reference network translations, and this model is adjusted in the Jason-2 LEO satellite orbit determination.