TY - GEN
T1 - Long term evolution of the eccentricity in the MEO region
T2 - AAS/AIAA Astrodynamics Specialist Conference, ASC 2015
AU - Deleflie, Florent
AU - Daquin, J.
AU - Alessi, E. M.
AU - Rossi, A.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - We study the long term evolution of the mean eccentricity of trajectories within the MEO region, and in particular at altitudes corresponding to Galileo nominal or disposal cases, following a semi-analytical and an analytical approach. The model accounts for all the significant perturbations acting on the trajectories: zonal and tesseral parameters of the Earth's gravity field, luni-solar attraction, atmospheric drag when relevant; we study the time evolution of the two components of the eccentricity vector, depending on the choice of the initial conditions: long period variations, that could even been seen as secular effects over some periods, are interpreted in terms of the influence of the luni-solar attraction. Maps of maximal eccentricity reached over less than 2 centuries are performed with the STELA s/w, and the role played by the Ω + 2ω resonance is underlined.
AB - We study the long term evolution of the mean eccentricity of trajectories within the MEO region, and in particular at altitudes corresponding to Galileo nominal or disposal cases, following a semi-analytical and an analytical approach. The model accounts for all the significant perturbations acting on the trajectories: zonal and tesseral parameters of the Earth's gravity field, luni-solar attraction, atmospheric drag when relevant; we study the time evolution of the two components of the eccentricity vector, depending on the choice of the initial conditions: long period variations, that could even been seen as secular effects over some periods, are interpreted in terms of the influence of the luni-solar attraction. Maps of maximal eccentricity reached over less than 2 centuries are performed with the STELA s/w, and the role played by the Ω + 2ω resonance is underlined.
UR - http://www.scopus.com/inward/record.url?scp=85007341999&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85007341999
SN - 9780877036296
T3 - Advances in the Astronautical Sciences
SP - 1149
EP - 1159
BT - Astrodynamics 2015
A2 - Turner, James D.
A2 - Wawrzyniak, Geoff G.
A2 - Cerven, William Todd
A2 - Majji, Manoranjan
PB - Univelt Inc.
Y2 - 9 August 2015 through 13 August 2015
ER -