Absolute calibration of a geodetic time transfer system

Plumb, John; Larson, Kristine M.; White, J.; Powers, Edward

doi:10.1109/tuffc.2005.1561658

Cited by 50 publications

(32 citation statements)

References 12 publications

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“…3 (actually 2 Digital IF Boards are placed inside were used in the 19"-1U assembled receiver), has been ported on a single Board together with the GAL-SIS-GEN. The theoretical lower bound for the PLL is extrapolated by (2). Note that since receiver tracks the Pilot channel, the Squaring Loss can be neglected [4], in agreement with (2).…”

Section: Fig 2 Galileo Tranceivermentioning

confidence: 71%

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Design and implementation of a true GALILEO Transceiver

Tabacco

Cornacchini

Vernucci

et al. 2012

2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL)

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The paper describes an optimized solution for the a Galileo Pseudolite based on a Transceiver consisting in the integration of a very accurate dual carrier (programmable E1-E6 or E1-E5) GALILEO Signal In Space Generator and a matched dual carrier GALILEO precision Time Receiver in a very compact (16 mm by 10 mm) state of art Software Radio Hardware platform. This solution simplifies the synchronization of the pseudolite to a system time without the necessity to foresee the presence of dedicate infrastructure such as reference station.

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Section: Fig 2 Galileo Tranceivermentioning

confidence: 71%

“…The GNSS receiver core technology used by Space Engineering for the implementation of the TRS is based on the assumption that the Space Technology GAL Receiver shall allow the Absolute calibration [2] assuming the Calibration bench portrayed in Fig. 10.…”

Section: Time Calibrationmentioning

confidence: 99%

Design and implementation of a true GALILEO Transceiver

Tabacco

Cornacchini

Vernucci

et al. 2012

2012 IEEE First AESS European Conference on Satellite Telecommunications (ESTEL)

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“…The absolute calibration method was first defined and put into operations by NRL [6] and the University of Colorado [4]. Since 2005, CNES is developing this method with a similar approach [5,7].…”

Section: Receiver Calibrationmentioning

confidence: 99%

“…With this approach, the measurement uncertainty is about 0.2 ns [4]. The CNES method is based on the same measurement but where a post-treatment is added.…”

Section: B Main Differences Between Both Techniquesmentioning

confidence: 99%

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Absolute calibration of GNSS time transfer systems: NRL and CNES techniques comparison

Proia

Cibiel

White

et al. 2011

2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings

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The GNSS reception chains (timing receiver + antenna + antenna cable) are used to perform time comparisons of remote atomic clocks. This time transfer system represents the basis of the time laboratories contributions for the realization of the Temps Atomique International (TAI). The calibration of these chains are necessary to ensure accuracy and long term stability of time links used in TAI but also in precise time station (PTS) dedicated to GALILEO. Currently, the most widely used approach to determine the electrical-delay of these devices is the differential method developed by the BIPM (Bureau des Poids et Mesures). Another solution is the absolute calibration of each reception chain element in using artificial signals. This method was first defined and put into operation by NRL (Naval Research Laboratory) and the University of Colorado. In 2005, CNES (Centre National d'Etudes Spatiales) decided to develop this technique with a similar approach.This paper will compare the results of NRL and CNES absolute calibrations performed on two different time transfer systems. First of all, it will describe the calibration method used by each laboratory and the differences which characterize them. An uncertainty budget will be presented for the results of both calibration techniques. Then, both time transfer systems, composed of different receivers and antennas models, will be described briefly. Finally, the absolute calibrations results performed using the NRL and the CNES methods will be compared..

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What We Measure and What We Process

Menn¹

2012

Instrumentation and Metrology in Oceanography

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Absolute calibration of a geodetic time transfer system

Cited by 50 publications

References 12 publications

Design and implementation of a true GALILEO Transceiver

Design and implementation of a true GALILEO Transceiver

Absolute calibration of GNSS time transfer systems: NRL and CNES techniques comparison

What We Measure and What We Process

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