On the charged particle drag acting on LAGEOS

Andrés, J.I.; Sanmartín Losada, Juan Ramón y Noomen, R. (2007). On the charged particle drag acting on LAGEOS. En: "10th Spacecraft Charging Technology Conference", 18-21 jun, Biarritz.

Descripción

Título: On the charged particle drag acting on LAGEOS
Autor/es:
  • Andrés, J.I.
  • Sanmartín Losada, Juan Ramón
  • Noomen, R.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 10th Spacecraft Charging Technology Conference
Fechas del Evento: 18-21 jun
Lugar del Evento: Biarritz
Título del Libro: 10th Spacecraft Charging Technology Conference
Fecha: 2007
Materias:
Escuela: E.T.S.I. Aeronáuticos (UPM) [antigua denominación]
Departamento: Física Aplicada a la Ingeniería Aeronáutica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

A recent study by the authors points to Charged Particle Drag (CPD) as a contributor to revisit in the LAGEOS non-gravitational perturbations problem. Such perturbations must account for dynamical contributions in the order of pms−2 . The simulated effect takes into account: (i) spatial and temporal variations of the plasmatic parameters (temperature and concentration of the species), (ii) spacecraft potential variations caused by both the eclipse passages and variations in the parameters mentioned above, and (iii) solar and geomagnetic conditions. Furthermore, recent theoretical improvements concerning scattering drag overcome previous limitations allowing for a complete formulation of this effect. For each satellite the lifetime CPD instantaneous acceleration is computed. The plasmatic parameters have been obtained fromthe Sheffield Coupled Thermosphere-Ionosphere-Plasmasphere (SCTIP) semi-empirical model (up to the polar region), as well as alytical/empirical approximations based on spacecraft measurements for the auroral and polar regions. Results show that maximum amplitudes for LAGEOSI are larger than those for LAGEOS-II: −85 pms−2 and −70 pms−2 respectively. This is due to the almost (magnetically) polar orbit configuration of the first, producing larger combinations of plasmatic parameter values. High solar activity has a huge impact in the resulting LAGEOS accelerations: it yields a perfect modulation of the resulting acceleration with maximum amplitudes up to a factor of 10 when comparing low and high activity periods. On the other hand, the impact of the geomagnetic activity results into a reduction of the effect itself, probably due to a decrease in the hydrogen concentration for high energy input periods. The acceleration results will be used in a refined orbit computation in a subsequent investigation.

Más información

ID de Registro: 21785
Identificador DC: http://oa.upm.es/21785/
Identificador OAI: oai:oa.upm.es:21785
Depositado por: Biblioteca ETSI Aeronauticos
Depositado el: 12 May 2014 11:57
Ultima Modificación: 21 Abr 2016 12:32
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