Observation of BDS-2 IGSO/MEOs yaw-attitude behavior during eclipse seasons

Xia, Fengyu; Ye, Shirong; Chen, Dezhong; Jiang, Nana

doi:10.1007/s10291-019-0857-8

Cited by 12 publications

(5 citation statements)

References 16 publications

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“…Generally, the model can predict the yaw behaviors quite well, however, a reverse midnightturn maneuvers was first observed for I06 on DOY 171, 2017, when the β angle was less than 0.1° (Wang et al, 2018). Later more evens were identified for BDS-2 C13 and C14 when β angles falls into the range (0°, 0.14°) (Xia et al, 2019). Hence, a yaw bias of 0.14° is introduced to predict the features of the reverse midnight-turn yaw maneuvers (Xia et al, 2019).…”

Section: Yaw Attitudementioning

confidence: 95%

“…The above models are quite consistent because the yaw angles at orbit angle of 90° are about ± 4° for the low β angle. However, the analysis of all historical attitude switch events of BDS-2 IGSO and MEO satellites from 2016 to 2019 demonstrates that there are a few events occurring with |β| > 4° for YS to ON and |β| < 4° for ON to YS switch, respectively (Xia et al, 2019).…”

Section: Yaw Attitudementioning

confidence: 99%

“…Later more evens were identified for BDS-2 C13 and C14 when β angles falls into the range (0°, 0.14°) (Xia et al, 2019). Hence, a yaw bias of 0.14° is introduced to predict the features of the reverse midnight-turn yaw maneuvers (Xia et al, 2019).…”

Section: Yaw Attitudementioning

confidence: 99%

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Precise orbit determination for BDS satellites

et al. 2022

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Since the first pair of BeiDou satellites was deployed in 2000, China has made continuous efforts to establish its own independent BeiDou Navigation Satellite System (BDS) to provide the regional radio determination satellite service as well as regional and global radio navigation satellite services, which rely on the high quality of orbit and clock products. This article summarizes the achievements in the precise orbit determination (POD) of BDS satellites in the past decade with the focus on observation and orbit dynamic models. First, the disclosed metadata of BDS satellites is presented and the contribution to BDS POD is addressed. The complete optical properties of the satellite bus as well as solar panels are derived based on the absorbed parameters as well the material properties. Secondly, the status and tracking capabilities of the L-band data from accessible ground networks are presented, while some low earth orbiter satellites with onboard BDS tracking capability are listed. The topological structure and measurement scheme of BDS Inter-Satellite-Link (ISL) data are described. After highlighting the progress on observation models as well as orbit perturbations for BDS, e.g., phase center corrections, satellite attitude, and solar radiation pressure, different POD strategies used for BDS are summarized. In addition, the urgent requirement for error modeling of the ISL data is emphasized based on the analysis of the observation noises, and the incompatible characteristics of orbit and clock derived with L-band and ISL data are illuminated and discussed. The further researches on the improvement of phase center calibration and orbit dynamic models, the refinement of ISL observation models, and the potential contribution of BDS to the estimation of geodetic parameters based on L-band or ISL data are identified. With this, it is promising that BDS can achieve better performance and provides vital contributions to the geodesy and navigation.

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Section: Yaw Attitudementioning

confidence: 95%

Section: Yaw Attitudementioning

confidence: 99%

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Precise orbit determination for BDS satellites

et al. 2022

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“…When the absolute value of β angle is less than a critical value, the satellite enters the eclipse seasons [44]. For GEO and IGSO satellites, the value is 8.5 deg, while for MEO satellites the value is 14.5 deg [45,46]. The shaded regions in Figure 4 represent the eclipse seasons.…”

Section: Analysis Of Periodic Variations In Bds Satellite Clock Offsetsmentioning

confidence: 99%

BDS Satellite Clock Prediction Considering Periodic Variations

Zhao

et al. 2021

Remote Sensing

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The periodic noise exists in BeiDou navigation satellite system (BDS) clock offsets. As a commonly used satellite clock prediction model, the spectral analysis model (SAM) typically detects and identifies the periodic terms by the Fast Fourier transform (FFT) according to long-term clock offset series. The FFT makes an aggregate assessment in frequency domain but cannot characterize the periodic noise in a time domain. Due to space environment changes, temperature variations, and various disturbances, the periodic noise is time-varying, and the spectral peaks vary over time, which will affect the prediction accuracy of the SAM. In this paper, we investigate the periodic noise and its variations present in BDS clock offsets, and improve the clock prediction model by considering the periodic variations. The periodic noise and its variations over time are analyzed and quantified by short time Fourier transform (STFT). The results show that both the amplitude and frequency of the main periodic term in BDS clock offsets vary with time. To minimize the impact of periodic variations on clock prediction, a time frequency analysis model (TFAM) based on STFT is constructed, in which the periodic term can be quantified and compensated accurately. The experiment results show that both the fitting and prediction accuracy of TFAM are better than SAM. Compared with SAM, the average improvement of the prediction accuracy using TFAM of the 6 h, 12 h, 18 h and 24 h is in the range of 6.4% to 10% for the GNSS Research Center of Wuhan University (WHU) clock offsets, and 11.1% to 14.4% for the Geo Forschungs Zentrum (GFZ) clock offsets. For the satellites C06, C14, and C32 with marked periodic variations, the prediction accuracy is improved by 26.7%, 16.2%, and 16.3% for WHU clock offsets, and 29.8%, 16.0%, 21.0%, and 9.0% of C06, C14, C28, and C32 for GFZ clock offsets.

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“…When the β angle is close to zero (-4°to 4°), the attitude model will be changed from yaw-steering to orbit-normal. Furthermore, C06, C13 and C14 employ a former attitude model at their early times and the new attitude model after 2017059, 2016089, and 2016300 respectively [37]. The PCO…”

Section: Processing Strategymentioning

confidence: 99%

Improved Antenna Phase Center Offsets for BDS-2 IGSO/MEO Satellites Based on MGEX Long-Term Observations

Zeng

Zhou

et al. 2020

IEEE Access

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For the purpose of further improving the solution accuracies of the orbital and geodetic parameters for BDS (BeiDou Navigation Satellite System) precise applications, this paper focuses on the enhancements of antenna phase center offsets (PCOs) for BDS-2 IGSOs (Inclined Geosynchronous Satellite Orbits) and MEOs (Medium Earth Orbits) through processing observations from a global tracking network. The daily estimated horizontal and vertical PCO time series of nearly three years from DOY (Day of Year) 001 in 2018 to DOY 180 in 2020 are obtained using the PANDA (Position And Navigation Data Analysis) software. The long-term PCO time series have seasonal variations and systematic effects along with the elevation angle of the Sun with respect to the orbital plane. Then, type-specific x-offsets and y-offsets of IGSOs and MEOs are comprehensively available considering the good consistency for the same satellite type. And a set of satellite-specific vertical offsets are recommended to BDS-2 IGSOs and MEOs since the low coherence of these satellites with the same type. Validation experiments are carried out for comparison between the original MGEX (Multi-GNSS Experiment) PCOs and the newly improved values (iMGEX PCOs for short), including the Precise Orbit Determination (POD) and Precise Point Positioning (PPP). Based on the orbital overlap analysis, the qualities of BDS-2 orbits show great enhancements in the alongtrack, cross-track and radial components, when the iMGEX PCOs are employed. Results of the independent assessment using SLR (Satellite Laser Ranging) also indicate the improvements on the radial component for C08, C10 and C11 satellites, and most of the orbit RMSs (Root Mean Squares) of iMGEX results decreased by 40.5% on average compared with the MGEX values. Additionally, the experimental station coordinates by static PPP achieve improvements at the rate of 27.1%, 32.6% and 28.4% in the east, north, and up component, respectively, in which more than a half stations realize sub-centimeter positioning accuracy in the north component using the iMGEX PCOs.

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Observation of BDS-2 IGSO/MEOs yaw-attitude behavior during eclipse seasons

Cited by 12 publications

References 16 publications

Precise orbit determination for BDS satellites

Precise orbit determination for BDS satellites

BDS Satellite Clock Prediction Considering Periodic Variations

Improved Antenna Phase Center Offsets for BDS-2 IGSO/MEO Satellites Based on MGEX Long-Term Observations

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