Determination of ocean tidal parameters from the long-period analysis of the orbit of Starlette

Ocean-tide parameters from the simultaneous long-period analysis of the orbits of Starlette and Stella

“…Illfitting data points were then relaxed in order to keep all weighted residuals below 2 . The results for this best fit are given in Tables 1, 2 Harwood and Swinerd (1996). The results from this analysis, and over this period, do not differ significantly from those of the previous analysis, with the exception of a small slope to the eccentricity variation.…”

“…Agreement for the diurnal and semi-diurnal tides is good. The multisatellite analysis has allowed the determination of more tidal coefficients than in the analysis by Cheng (1990) and the previous analysis by Harwood and Swinerd (1996) (without having to constrain the results to any particular model). As such, the results from this multisatellite analysis, including Stella data, show a significant improvement in those determined using Starlette data alone.…”

“…The package was written to conform to Project MERIT standards (Melbourne et al, 1983). In the previous analysis by Harwood and Swinerd (1996) the orbit of Starlette was determined over a 2-year period between January 1991 and December 1992. In this analysis the orbits have been redetermined over a longer period (January 1991 to December 1993) using a different orbital arc length and a different combination of orbital parameters.…”

“…The results showed some significant discrepancies in the recovered parameter values when compared with the results from short-arc analyses. Another long-term analysis by Harwood and Swinerd (1996) over a 2-year period utilized a novel long-period analysis technique (Harwood and Swinerd (1995) in order to determine the ocean tidal coefficients.…”

Ocean-tide parameters from the simultaneous long-period analysis of the orbits of Starlette and Stella

“…Dominant long-period changes in the orbital inclination occur only for the even-degree tidal harmonics and when t 0 (Harwood and Swinerd, 1996). For the right ascension of the ascending node, dominant terms arise when s is even, but now we have that t 0; 1; 2; and so the nodal perturbation is sensitive to the long-period tides.…”