Seminario en Departamento de Astronomía
Susana Garay Romero 26 Jul 202126/07/21 a las 13:45 hrs.2021-07-26 13:45:26
Estimado/as
El Jueves 29 de Julio a las 12:15 hrs, tendremos seminario en el Departamento de Astronomía de la Universidad de Chile.
Speaker: Sebastien Bouquillon
FCLA/DAS and Paris ObservatoryTitle: GAIA GROUND BASED OPTICAL TRACKING :What we learnt about digital astrometry of moving objects
Abstract: The Gaia satellite (ESA) evolves on a Lissajous orbit around the Sun-Earth L2 Lagrangian Point. To fully achieve the scientific objectives of the mission, and to completely eliminate effects such as aberration, the daily position and velocity vectors of the spacecraft have to be known to an accuracy respectively greater than 20 mas and 2.5mm/s. As these accuracies can not be reached by traditional techniques of spacecraft tracking (in particular in the normal plane to the line of sight) a Ground Based Optical Tracking (GBOT) of the satellite has been adopted. In this framework, we carried out a theoretical study with the aim of proving the feasibility of the GBOT project and optimizing the observational strategy by characterizing the astrometric precision limit for moving targets observed with digital-array detectors (Bouquillon et al, A&A 2017). This research led to useful results for planning astrometric observation of all kinds of moving bodies as meteors, satellites, space debris or asteroids.
Virtual room: uchile.zoom.us/ ... NkNpdGFZb0sxRVZJdz09
Rene A. Mendez
Seminar Coordinator
DAS/UChile - rmendez@uchile.cl
--
--
Saludos,
Alejandro Leal Obreque
Departamento de Astronomía
FCFM - UNIVERSIDAD DE CHILE
22 977 1154
aleal@das.uchile.clwww.das.uchile.cl
--
Dr. Rene A. Mendez B. www.das.uchile.cl/~rmendez/
Departamento de Astronomia & Observatorio Astronomico Nacional
Universidad de Chile Email: rmendez@uchile.cl
Casilla 36-D Skype: rene_a_mendez
Santiago Tel: 56-2-2 977 1117
Chile Time Zone: UTC-4
Libre de virus. www.avg.com
El Jueves 29 de Julio a las 12:15 hrs, tendremos seminario en el Departamento de Astronomía de la Universidad de Chile.
Speaker: Sebastien Bouquillon
FCLA/DAS and Paris ObservatoryTitle: GAIA GROUND BASED OPTICAL TRACKING :What we learnt about digital astrometry of moving objects
Abstract: The Gaia satellite (ESA) evolves on a Lissajous orbit around the Sun-Earth L2 Lagrangian Point. To fully achieve the scientific objectives of the mission, and to completely eliminate effects such as aberration, the daily position and velocity vectors of the spacecraft have to be known to an accuracy respectively greater than 20 mas and 2.5mm/s. As these accuracies can not be reached by traditional techniques of spacecraft tracking (in particular in the normal plane to the line of sight) a Ground Based Optical Tracking (GBOT) of the satellite has been adopted. In this framework, we carried out a theoretical study with the aim of proving the feasibility of the GBOT project and optimizing the observational strategy by characterizing the astrometric precision limit for moving targets observed with digital-array detectors (Bouquillon et al, A&A 2017). This research led to useful results for planning astrometric observation of all kinds of moving bodies as meteors, satellites, space debris or asteroids.
Virtual room: uchile.zoom.us/ ... NkNpdGFZb0sxRVZJdz09
Rene A. Mendez
Seminar Coordinator
DAS/UChile - rmendez@uchile.cl
--
--
Saludos,
Alejandro Leal Obreque
Departamento de Astronomía
FCFM - UNIVERSIDAD DE CHILE
22 977 1154
aleal@das.uchile.clwww.das.uchile.cl
--
Dr. Rene A. Mendez B. www.das.uchile.cl/~rmendez/
Departamento de Astronomia & Observatorio Astronomico Nacional
Universidad de Chile Email: rmendez@uchile.cl
Casilla 36-D Skype: rene_a_mendez
Santiago Tel: 56-2-2 977 1117
Chile Time Zone: UTC-4
Libre de virus. www.avg.com
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