6th International Conference on Astrodynamics Tools and Techniques (ICATT)

Session

Loitering / Orbiting (II)

15 Mar 2016, 10:40

Darmstadtium

Description

Low Earth Orbits (LEO), Medium Earth Orbits (MEO), High Earth Orbits (HEO), Geostationary Orbits (GEO); station-keeping; optimization of loitering arcs; computation of drag-free orbits; circular and elliptical orbits around planets and Moons; resonant orbits and fuel efficient trajectories;

152. Hybrid SGP4: tools and methods

Dr Juan Félix San-Juan (Scientific Computing Group (GRUCACI), University of La Rioja)

15/03/2016, 11:00

02: Loitering / Orbiting

Oral presentation at the conference

The propagation of an orbit which is subject to perturbation forces is a non-integrable 6-degree-of-freedom problem that has been classically tackled in three different ways. General Perturbation Theories attempt to deduce an analytical expression for the future position and velocity of the orbiter as a function of its initial conditions and time. Nevertheless, the non-integrability of the...

157. Proposed algorithm for on-board maneouvres calculation

Mrs Itziar Barat (Deimos Space @ ESA/ESTEC)

15/03/2016, 11:20

02: Loitering / Orbiting

Oral presentation at the conference

The orbit control for LEO missions is becoming more and more demanding in terms of manoeuvring. This paper proposes a simplified algorithm in order to calculated on board the drag make-up manoeuvres. It is not pretended to give a full solution of the problem, but a starting point for future implementations. There are two main rationale of calculating this manoeuvres on-board, the first one...

125. Fast Low Earth Orbit Acquisition Plan Optimiser

Dr Sérgio Brás (National Trainee @ ESA/ESTEC)

15/03/2016, 11:40

02: Loitering / Orbiting

Oral presentation at the conference

Earth observation data is key for a more efficient use of land and natural resources, better land and sea monitoring, more informed political decisions, and better understanding of the weather, climate, and land changes. Many Earth observation satellites are operated in low Earth orbits which provide a good trade-off between revisit time and spatial resolution. Repeat ground track orbits...

82. An implementation of SGP4 in non-singular variables using a functional paradigm

Mr Pablo Pita Leira (Goetzfried Professionals GmbH)

15/03/2016, 12:00

02: Loitering / Orbiting

Oral presentation at the conference

The SGP4 (Simplified General Perturbations 4) orbit propagator is a widely used tool for the fast, short term propagation of space orbits. The algorithms in which it is based are thoroughly described in the SPACETRACK report #3, as well as in Vallado et al. update. Current implementations of SGP4 are based on Brouwer's gravity solution and Lane atmospheric model, but using Lyddane's...

8. New tool for finding periodic Halo orbits: the solver of a Spacecraft Simulator (ESPSS -EcosimPro® European Space Propulsion System Simulation)

Mr christophe Koppel (KopooS Consulting Ind.)

15/03/2016, 12:20

02: Loitering / Orbiting

Oral presentation at the conference

Halo orbits and other periodic orbits in the restricted circular 3 body problem has always been very well explained in the literature since their discovery by Farquhar in the 60 of last century. However for finding the numerical values of such orbits, the availability of the tools dedicated for such tasks is not obvious. Due to the fact that the differential equations are quite simple, those...