This paper gives an overview of many aspects of satellite drag modelling for orbit determination.
The Plaid Model, which is a self-contained sequel to Richard Schwartz's Outer Billiards on Kites, provides a combinatorial model for orbits of outer billiards on kites.
Because private companies are focused on profit, they are likely to develop cheaper models for low-orbit travel, Mr. Lancaster said, like reusable rockets.
His demonstration of an alternative to Ptolemy's models for the orbits of Mercury and Venus with respect to the Sun gave Nicolaus Copernicus (1473 1543) the geometric key to reorient planetary motions around the Sun.
Precise orbit determination requires accurate models for the orbital perturbations.
For instance, by combining (1) and (2), the law of gravitation (a "fundamental" law, Cartwright 1983, 58 59), other source laws, and various simplifying assumptions, we might create a model for the orbit of Mars, treating the Sun and Mars as a 2-body system, ignoring the other planets, asteroids, and Mars' moons.
The DPOD model was tested for orbit determination for TOPEX/Poseidon (T/P), Jason-1 and Jason-2.
Experiments with Beidou data show that during the equinox periods the orbit-only contribution to the signal-in-space range error (SISRE ORB)) using the BDSPHERE model for GEOs in orbit determination arc and the 8-h and 24-h orbit predictions arc are 0.77, 0.80 and 1.62 m, respectively, which are smaller than those of the conventional SPHERE model by 53%, 60%and61%1%, respectively.
The increasing interest in IGRF for space applications may, for example, lead IAGA to consider in the future the introduction of models for magnetic sources internal to satellite orbits, including the magnetic field generated by currents flowing in the ionosphere or also quasi-static magnetospheric field contributions.
The chapter presents a variety of models for simulating relative motion in perturbed or unperturbed elliptic orbits.
