Enhancing the kinematic precise orbit determination of low earth orbiters using GPS receiver clock modelling

Yang, Yang; Yue, Xiaokui; Yuan, Jianping; Rizos, Chris

doi:10.1016/j.asr.2014.07.016

Cited by 13 publications

(13 citation statements)

References 28 publications

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“…Stable oscillators thus enable a robust clock model and can stabilize the radial orbital component. This concept is simulated for the GRACE mission to model the receiver clock offset, and a 40% improvement in the radial direction is shown (Yang et al 2014).…”

Section: Discussion On Postmission Podmentioning

confidence: 99%

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

2022

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Precise orbit determination (POD) is the procedure for determining the orbit of a satellite with high accuracy. Compared with global navigation satellite systems (GNSS), the low Earth orbit (LEO) satellites have some different features in space, mainly due to perturbations caused by dynamic forces related to their altitudes. Methods for POD of LEO satellites have been developed over the last decades. Nowadays, postprocessed precise orbits are used in different space applications such as radio occultation, satellite altimetry, and interferometric syntheticaperture radar missions. The advancements in technology decrease the size of LEO satellites and developments in theory increase their orbital accuracy. In recent years, onboard POD has become a hot topic in the navigation and positioning field, which is crucial for, e.g., formation flying of small satellites and GNSS-aided LEO megaconstellations for positioning purposes. This contribution reviews LEO POD methods based on undifferenced GNSS observations in both postmission and real-time data processing. It comprises the quality control step, the models used and their limitations, processing algorithms, and different validation methods. To have a clear insight into the current and the future state of the LEO POD, the most recent developments and important achievements are also discussed.

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Section: Discussion On Postmission Podmentioning

confidence: 99%

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

2022

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“…Hence, the GPS signal will not be affected by the troposphere. More details on how to correct these errors especially for LEO satellite orbit determination can be found in [24].…”

Section: Gps Observation Errors Correctionmentioning

confidence: 99%

“…The dynamic models/parameters used for orbit propagation and corresponding state transition matrix and sensitivity matrix are summarised in Table 2. Various error sources in the observation model equations (see (3)) should be carefully corrected, for example, the carrier phase windup effects, the antenna phase centre offsets, and some other systematic noises [24]. EKF parameter settings are given in Table 3.…”

Section: Grace Data Analysismentioning

confidence: 99%

GPS Based Reduced-Dynamic Orbit Determination for Low Earth Orbiters with Ambiguity Fixing

Yang

Yue

Yuan

2015

International Journal of Aerospace Engineering

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With the ever-increasing number of satellites in Low Earth Orbit (LEO) for scientific missions, the precise determination of the position and velocity of the satellite is a necessity. GPS (Global Positioning System) based reduced-dynamic orbit determination (RPOD) method is commonly used in the post processing with high precision. This paper presents a sequential RPOD strategy for LEO satellite in the framework of Extended Kalman Filter (EKF). Precise Point Positioning (PPP) technique is used to process the GPS observations, with carrier phase ambiguity resolution using Integer Phase Clocks (IPCs) products. A set of GRACE (Gravity Recovery And Climate Experiment) mission data is used to test and validate the RPOD performance. Results indicate that orbit determination accuracy could be improved by 15% in terms of 3D RMS error in comparison with traditional RPOD method with float ambiguity solutions.

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“…It is reported that the robustness and accuracy of satellite trajectory could be improved by about 40% in the radial direction and 7% in the along-track and cross-track directions, when a 60-s piecewise linear clock model is utilized [13]. Meanwhile, a three-order polynomial model is also available for this situation where the receiver clocks are expressed by offset, frequency offset and frequency drift based on the extended Kalman filter (EKF) solution [14,15]. Comparable results to the linear clock model could be achieved by the polynomial model.…”

Section: Introductionmentioning

confidence: 99%

Improving the GRACE Kinematic Precise Orbit Determination Through Modified Clock Estimating

Zhou

Jiang

Chen

et al. 2019

Sensors

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Utilizing global positioning system (GPS) to determine the precise kinematic orbits for the twin satellites of the Gravity Recovery and Climate Experiment (GRACE) plays a very important role in the earth’s gravitational and other scientific fields. However, the orbit quality is highly depended on the geometry of observed GPS satellites. In this study, we propose a kinematic orbit determination method for improving the GRACE orbit quality especially when the geometry of observed GPS satellites is weak, where an appropriate random walk clock constraint between adjacent epochs is recommended according to the stability of on-board GPS receiver clocks. GRACE data over one month were adopted in the experimental validation. Results show that the proposed method could improve the root mean square (RMS) by 20–40% in radial component and 5–20% in along and cross components. For those epochs with position dilution of precision (PDOP) larger than 4, the orbits were improved by 50–70% in radial component and 17–50% in along and cross components. Meanwhile, the Allan deviation of clock estimates in the proposed method was much closer to the reported Allan deviation of GRACE on-board oscillator. All the results confirmed the improvement of the proposed method.

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Enhancing the kinematic precise orbit determination of low earth orbiters using GPS receiver clock modelling

Cited by 13 publications

References 28 publications

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

Precise Orbit Determination of LEO Satellites Based on Undifferenced GNSS Observations

GPS Based Reduced-Dynamic Orbit Determination for Low Earth Orbiters with Ambiguity Fixing

Improving the GRACE Kinematic Precise Orbit Determination Through Modified Clock Estimating

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