Space qualified frequency sources (clocks) for current and future GNSS applications

Mallette, Leo A.; White, J.; Rochat, P.

doi:10.1109/plans.2010.5507225

Cited by 21 publications

(10 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…QZS‐1 is equipped with a similar type of rubidium frequency standard (RFS) as the GPS Block IIF satellites . More details on this particular clock as well as on its in space performance can be found in .…”

Section: Clock Resultsmentioning

confidence: 99%

Orbit and Clock Determination of QZS-1 Based on the CONGO Network

et al. 2013

View full text Add to dashboard Cite

QZS-1 is the first satellite of the Japanese Quasi-Zenith Satellite System (QZSS) launched in September 2010. Five stations of the Cooperative Network for GIOVE Observation (CONGO) are able to track the QZSS L1, L2, and L5 navigation signals. Together with the GPS observations of these stations, QZS-1 orbit and clock parameters were estimated. Various orbit parameterizations were tested and a sub-meter accuracy of the best orbits could be achieved. Differences of orbits obtained from various linear combinations are on the decimeter level and differential code biases are on the few nanosecond level. Short periodic variations with a peak-to-peak amplitude of about 4 cm were detected in the QZS-1 clock estimates. Three time intervals with different periods of 13.6 -15.5 minutes could be identified. Three way carrier phase analysis confirmed the presence of these variations. The origin of these periodicities is considered to be an artifact of the time keeping system.

show abstract

Section: Clock Resultsmentioning

confidence: 99%

Orbit and Clock Determination of QZS-1 Based on the CONGO Network

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Instead, the four Rubidium atomic frequency standards onboard this satellite have been developed and produced in China (Mallette et al 2010).…”

mentioning

confidence: 99%

Characterization of Compass M-1 signals

et al. 2011

View full text Add to dashboard Cite

An analysis of observations from China's first medium earth orbit satellite Compass M-1 is presented, with main focus on the first orbit and clock solution for this satellite. The orbit is computed from laser ranging measurements. Based on this orbit solution, the apparent clock offset is estimated using measurements from two GNSS receivers, which allow Compass tracking. The analysis of the clock solutions reveals unexpectedly high dynamics in the pseudorange and carrier-phase observations. Furthermore, carrier-to-noise density ratio, pseudorange noise, and multipath are analyzed and compared to GPS and GIOVE. The results of the clock analysis motivate further research on the signals of the geostationary satellites of the Compass constellation.

show abstract

“…The MEO satellite, called Compass M-1, is an experimental satellite and has been launched in April 2007 and embarks Rubidium-cell clocks [7]. Some of the Beidou on-board clocks were Rb-cell clocks purchased from SpectraTime in Switzerland.…”

Section: Results For Beidou/compass Clocksmentioning

confidence: 99%

Short-term stability of GNSS on-board clocks using the polynomial method

Delporte

Boulanger

Mercier

2012

2012 European Frequency and Time Forum

View full text Add to dashboard Cite

The stability of on-board clocks is an essential issue in the performance of Global Navigation Satellite Systems (GNSS). We developed a straightforward method (the polynomial method) that allows to determine the short term stability of a GNSS on-board clock for a pass over a ground station driven by a clock, the characteristics of which are better than the space clock we want to characterize. In previous papers [1,2], we validated the method on GPS on-board clocks using IGS clock products as reference. In this paper, we continue this work with GLONASS, Galileo, COMPASS/Beidou and QZSS on-board clocks.

show abstract

Space qualified frequency sources (clocks) for current and future GNSS applications

Cited by 21 publications

References 6 publications

Orbit and Clock Determination of QZS-1 Based on the CONGO Network

Orbit and Clock Determination of QZS-1 Based on the CONGO Network

Characterization of Compass M-1 signals

Short-term stability of GNSS on-board clocks using the polynomial method

Contact Info

Product

Resources

About