[AAA] Fwd: Seminario Virtual Room DAS - UChile:: GAIA GROUND BASED OPTICAL TRACKING :What we learnt about digital astrometry of moving objects, Jueves 29 de Julio

[Rene A. Mendez]

Estimado/as,

Les recuerdo que 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 Observatory

*Title*: 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 ofproving 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: 
https://uchile.zoom.us/j/89046359858?pwd=dURFTjIzbXU0NkNpdGFZb0sxRVZJdz09 
<https://uchile.zoom.us/j/89046359858?pwd=dURFTjIzbXU0NkNpdGFZb0sxRVZJdz09>

Rene A. Mendez
Seminar Coordinator
DAS/UChile - rmendez en uchile.cl <mailto:rmendez en uchile.cl>

-- 
-- 
Saludos,

Alejandro Leal Obreque
Departamento de Astronomía
FCFM - UNIVERSIDAD DE CHILE
22 977 1154
aleal en das.uchile.cl <mailto:aleal en das.uchile.cl>
www.das.uchile.cl <http://www.das.uchile.cl/>


<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 
	Libre de virus. www.avg.com 
<http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> 


<#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>


-- 
Este correo electrónico ha sido comprobado en busca de virus por AVG.
http://www.avg.com
------------ próxima parte ------------
Se ha borrado un adjunto en formato HTML...
URL: <http://fcaglp.fcaglp.unlp.edu.ar/pipermail/aaa/attachments/20210723/988af18d/attachment.html>