Giancarlo Cerretto

rozdział

GPS time link calibrations in the frame of EURAMET Project 1156

Hector Esteban, F. Javier Galindo, Andreas Bauch, Thomas Polewka, więcej

2015 Joint Conference of the IEEE International Frequency Control Symposium & the European Frequency and Time Forum > 649 - 654

2015 Joint Conference of the IEEE International Frequency Control Symposium & the European Frequency and Time Forum (FCS)

Since 2010 ROA has supported the coordination of the EURAMET Technical Committee for Time and Frequency (TC-TF) Project 1156, a response from EURAMET TC-TF to Recommendation 2 of CCTF 2009: to study the characterization of GNSS equipment in use for establishing the time links between institutes contributing with their clocks to TAI. Starting that year, a GPS calibration campaign was organized between...

artykuł

Calibration of galileo signals for time metrology

Pascale Defraigne, Wim Aerts, Giancarlo Cerretto, Elena Cantoni, więcej

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2014 > 61 > 12 > 1967 - 1975

Using global navigation satellite system (GNSS) signals for accurate timing and time transfer requires the knowledge of all electric delays of the signals inside the receiving system. GNSS stations dedicated to timing or time transfer are classically calibrated only for Global Positioning System (GPS) signals. This paper proposes a procedure to determine the hardware delays of a GNSS receiving station...

rozdział

Near real-time comparison of UTC(k)'s through a Precise Point Positioning approach

Pascale Defraigne, Quentin Baire, Giancarlo Cerretto, Francois Lahaye, więcej

2012 European Frequency and Time Forum > 349 - 353

2012 European Frequency and Time Forum (EFTF)

The time-transfer technique based on Precise Point Positioning (PPP) allows the comparison of atomic clocks with precisions at the level of hundred picoseconds. This paper presents the results obtained in near real-time using satellite orbit and clock information from IGS real-time streams and from the NRCan Ultra Rapid products (EMU). These results can be considered quite interesting for the National...

rozdział

EURAMET Project 1156, GPSCALEU: Results of two years GPS receiver calibration campaign

Hector Esteban, Juan Palacio, Andreas Bauch, Dirk Piester, więcej

2012 European Frequency and Time Forum > 354 - 360

2012 European Frequency and Time Forum (EFTF)

Since 2010 ROA has supported the coordination of the EURAMET Technical Committee for Time and Frequency (TC-TF) Project 1156, GPSCALEU, a reaction from EURAMET TC-TF to Recommendation 2 of CCTF 2009: to study the characterization of GNSS equipment in use for establishing the time links between institutes contributing with their clocks to TAI. Starting that year, it was organized a GPS calibration...

artykuł

Near real-time comparison and monitoring of time scales with precise point positioning using nrcan ultra-rapid products

Giancarlo Cerretto, Patrizia Tavella, Francois Lahaye, Yves Mireault, więcej

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2012 > 59 > 3 > 545 - 551

This paper experimentally evaluates the assessment of precise point positioning (PPP) using the Natural Resources Canada (NRCan) Ultra-Rapid GPS products to serve as a short latency time-transfer tool to assist timing laboratories in operational maintenance of frequency standards and time scale dissemination. An automated data exchange and processing system has been set up to serve the international...

rozdział

PPP using NRCan Ultra Rapid products (EMU): Near real-time comparison and monitoring of time scales generated in time and frequency laboratories

Giancarlo Cerretto, Patrizia Tavella, Francois Lahaye, Yves Mireault, więcej

2011 Joint Conference of the IEEE International Frequency Control and the European Frequency and Time Forum (FCS) Proceedings > 1 - 6

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

The Precise Point Positioning (PPP) time-transfer technique requires the availability of precise estimates of GNSS satellite orbits and clock offsets. Several such products are available from the International GNSS Service (IGS), each having their own characteristics: robustness, update rate, latency and satellite clock offset time interval. The most frequently updated IGS products are the Ultra Rapid...

artykuł

GNSS geodetic techniques for time and frequency transfer applications

François Lahaye, Giancarlo Cerretto, Patrizia Tavella

Advances in Space Research > 2011 > 47 > 2 > 253-264

We performed an initial analysis of the pseudorange data of the GIOVE-B satellite, one of the two experimental Galileo satellites currently in operation, for time transfer.1The time transfer technique specified herein does not refer to the definition of Galileo Common View as set up by the European Space Agency, the Royal Observatory of Belgium and Timing Expert, nor the Common View GPS standard practice...

rozdział

Precise Point Positioning: Implementation of the constrained clock model and analysis of its effects in T/F transfer

Giancarlo Cerretto, Francois Lahaye, Patrizia Tavella, Sergio Vitrano

EFTF-2010 24th European Frequency and Time Forum > 1 - 5

EFTF-2010 24th European Frequency and Time Forum

In recent years, many national timing laboratories have collocated geodetic Global Positioning System receivers together with their traditional GPS/GLONASS Common View receivers and Two Way Satellite Time and Frequency Transfer equipment. Many of these geodetic receivers operate continuously within the International GNSS Service (IGS), and their data are regularly processed by IGS Analysis Centers...

rozdział

Near-real time synchronization through a network of GNSS receivers located in timing laboratories

Giancarlo Cerretto, Andrea Perucca, Patrizia Tavella, Ricardo Piriz

EFTF-2010 24th European Frequency and Time Forum > 1 - 9

EFTF-2010 24th European Frequency and Time Forum

Today, an increasing number of users need high-quality GNSS products, such as precise satellite orbit and clock estimations and predictions, accurate receiver coordinates or tropospheric delays, for their applications (e.g., precise point positioning, GNSS augmentation services, weather services, etc). In recent years, many national timing laboratories have collocated geodetic GNSS receivers together...

artykuł

Network time and frequency transfer with GNSS receivers located in time laboratories

Giancarlo Cerretto, Andrea Perucca, Patrizia Tavella, Álvaro Mozo, więcej

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control > 2010 > 57 > 6 > 1276 - 1284

In this paper we investigate a possible network solution, similar to the IGS analysis center solutions, that can be easily managed by a network of timing institutes to solve for all the clock differences (in addition to other quantities) in a unique system to understand the feasibility and the advantages of this approach in time and frequency transfer. The investigation is based on a suite of global...

INFONA - portal komunikacji naukowej

Wyniki wyszukiwania dla: Giancarlo Cerretto

GPS time link calibrations in the frame of EURAMET Project 1156

Calibration of galileo signals for time metrology

Near real-time comparison of UTC(k)'s through a Precise Point Positioning approach

EURAMET Project 1156, GPSCALEU: Results of two years GPS receiver calibration campaign

Near real-time comparison and monitoring of time scales with precise point positioning using nrcan ultra-rapid products

PPP using NRCan Ultra Rapid products (EMU): Near real-time comparison and monitoring of time scales generated in time and frequency laboratories

GNSS geodetic techniques for time and frequency transfer applications

Precise Point Positioning: Implementation of the constrained clock model and analysis of its effects in T/F transfer

Near-real time synchronization through a network of GNSS receivers located in timing laboratories

Network time and frequency transfer with GNSS receivers located in time laboratories

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INFONA - portal komunikacji naukowej

Wyniki wyszukiwania dla: Giancarlo Cerretto

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