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Theses

Contribution à l'étalonnage en absolu d'une chaîne de réception GNSS

Abstract : The reception chains of navigation satellites signals (GNSS), composed of a receiver, an antenna cable and an antenna, are the most employed tool for the comparisons of spread worldwide atomic clocks necessary for the calculation of the International Atomic Clock (TAI). The calibration consists in determining the time delay of the signal during its propagation through the acquisition system. This measurement is necessary in order to guarantee the accuracy and the long-term stability of the time links. It exists two calibration techniques : the differential method and the absolute method. The differential technique consists in comparing the reception chain of the visited laboratory and a reference reception chain whose the delay is known. The absolu technique consists in determining independently each element of the reception chain with simulated signals in order to eliminate the noise due to the broadcast signal propagation. Since 2005, CNES (French Space Agency) develops this method. This thesis work consisted in developing and optimizing this method which opens the possibility to calibrate independently each element of the reception chain with a weak uncertainty. Moreover, this technique allows to characterize the performances of each element of the reception chain but also the thermal and hygrometric sensitivity of the receivers.
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Contributor : Amandine Proia <>
Submitted on : Thursday, February 9, 2012 - 5:04:35 PM
Last modification on : Monday, October 19, 2020 - 10:58:48 AM
Long-term archiving on: : Thursday, May 10, 2012 - 2:57:26 AM

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  • HAL Id : tel-00668405, version 1

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Amandine Proia. Contribution à l'étalonnage en absolu d'une chaîne de réception GNSS. Instrumentations et Détecteurs [physics.ins-det]. Observatoire de Paris, 2011. Français. ⟨tel-00668405⟩

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