Analysis of HY2A precise orbit determination using DORIS

Gao, Fan; Peng, Bibo; Zhang, Yu; Evariste, Ngatchou Heutchi; Liu, Jihua; Wang, Xiaohui; Zhong, Min; Lin, Mingsen; Wang, Nazi; Chen, Runjing; Xu, Haiming

doi:10.1016/j.asr.2014.11.032

Cited by 18 publications

(6 citation statements)

References 18 publications

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“…The SSALTO precise orbit named SSALTO or SSA orbit are released by the CNES-SSALTO/POD team in sp3 format for the missions with a DORIS receiver onboard. The accuracy of the precise orbit can reach 1.1 cm in the radial direction [32]. Table 3.…”

Section: Orbital Comparison Within Short-term Arc Periodmentioning

confidence: 99%

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Analysis of Precise Orbit Predictions for a HY-2A Satellite with Three Atmospheric Density Models Based on Dynamic Method

et al. 2018

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HY-2A (Haiyang 2A) is the first altimetry satellite in China, and it was designed to be in a repeated ground track orbit to achieve the mission targets. Maneuvers are necessary to keep the satellite on the designed orbit according to the dynamic precise orbital prediction. Atmospheric density models are essential for predicting the low Earth orbit (LEO) satellites, such as HY-2A. Nevertheless, it is a complex process to determine the optimal atmospheric density model for orbit prediction. In this paper, short-term and long-term orbit predictions based on the dynamic method using three different atmospheric density models are tested. Detailed comparisons and evaluation of the accuracy of the predicted results are performed. Furthermore, to assess the results for the ground tracking of the satellite, the interpolation method especially for a spherical surface is introduced. The results show that among the three models, the Jacchia 1971 model is in the closest agreement with Multi-Mission Ground Segment for Altimetry precise positioning and Orbitography (SSALTO) precise orbits. The root-mean-squares (RMSs) of radial orbit differences between the predicted and precise orbits are 0.016 m, 0.091 m, 0.176 m, 0.573 m, and 1.421 m for predicted 1-h, 12-h, 1-day, 3-day, and 7-day arcs, respectively.

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Section: Orbital Comparison Within Short-term Arc Periodmentioning

confidence: 99%

“…Table 2 gives the details of spacecraft surfaces and radiators, including the projected areas and optical characters. The solar arrays of HY-2A are unmovable, therefore the 13-plate macro-model of HY-2A is formed based on the information listed in Table 2 [32].…”

Section: The Orbit Prediction Strategymentioning

confidence: 99%

Analysis of Precise Orbit Predictions for a HY-2A Satellite with Three Atmospheric Density Models Based on Dynamic Method

et al. 2018

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“…In addition, the satellite also carries a laser retroreflector for the SLR. However, unlike the previous Haiyang-2A satellite [22], it does not carry a DORIS instrument. Thus, the GPS instrument is the only way to accomplish POD, which is of great significance for the Haiyang-2B missions, especially for processing altimetry data to invert the sea surface height.…”

Section: Table I Parameters Of the Gps Receivermentioning

confidence: 99%

Single-Differenced Ambiguity Resolution for Orbit Determination of the Haiyang-2B

Peng

Jiang

et al. 2021

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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In ambiguity resolution, the Hatch-Melbourne-Wübbena code and carrier phase combination is usually used to fix the wide-lane (WL) ambiguity, and thus, the quality of the code observations directly affects the fixing success rate, especially when there are some kind of serious bias errors. Unfortunately, we found that the P1 code multipath (MP) errors of the Haiyang-2B calculated using the MP combination formula rapidly increases from sub-meter to several meters at elevation less than 40°. These rapid variations lead to biases in the fixed WL ambiguities. In this article, we create a static correction map on a grid with 5°x 5°r esolution. Using this correction map, we reduced the root mean square of the P1 code bias errors from 1.04 to 0.47 m, which corresponds to an improvement of 54.8%. By comparing the different precise orbit determination solutions, we found that the ambiguity resolution significantly reduced the satellite laser ranging (SLR) residuals from 1.63 to 1.31 cm with an average improvement of 19.6%. However, because of the code errors, the ambiguity fixing rate of the P1 ambiguity-fixed solutions was much lower than that of the C1 solutions. By modeling this static correction, the impact of these errors was effectively reduced. The ambiguity fixing rate for the P1 solutions was improved by 15.6% and a 1-3 mm reduction in the SLR residuals was small but noticeable.Index Terms-Ambiguity resolution, code bias, Haiyang-2B, onboard global positioning system (GPS), orbit determination. I. INTRODUCTIONT HE Haiyang-2B microwave remote sensing satellite was launched using a CZ-4B rocket on October 25, 2018. In order to obtain high-precision orbit information, the satellite uses an onboard dual-frequency global positioning system (GPS) receiver as its key tracking system. This instrument was independently developed by the Space Star Technology Co., Ltd. and was used on several Chinese satellites, including ZY-3,

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“…Triangular functions like sine and cosine are used in the along track, radial and cross track to absorb the un-modelled non-gravitational forces. This method has been applied to the orbit determination of many missions such as Sentinel-1 (Peter et al, 2017), Jason (Cerri et al, 2010), HY-2A (Gao et al, 2015), GRACE (Gravity Recovery and Climate Experiment) (Kang et al, 2006), GOCE (Gravity field and steady-state Ocean Circulation Explorer) (Casotto et al, 2013) and GNSS satellites Arnold et al, 2015). Although this approach has been widely used by the community, it does have drawbacks.…”

Section: Introductionmentioning

confidence: 99%

Fast solar radiation pressure modelling with ray tracing and multiple reflections

Ziebart

Bhattarai

et al. 2018

Advances in Space Research

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Physics based SRP (Solar Radiation Pressure) models using ray tracing methods are powerful tools when modelling the forces on complex real world space vehicles. Currently high resolution (1 mm) ray tracing with secondary intersections is done on high performance computers at UCL (University College London). This study introduces the BVH (Bounding Volume Hierarchy) into the ray tracing approach for physics based SRP modelling and makes it possible to run high resolution analysis on personal computers. The ray tracer is both general and efficient enough to cope with the complex shape of satellites and multiple reflections (three or more, with no upper limit). In this study, the traditional ray tracing technique is introduced in the first place and then the BVH is integrated into the ray tracing. Four aspects of the ray tracer were tested for investigating the performance including runtime, accuracy, the effects of multiple reflections and the effects of pixel array resolution.Test results in runtime on GPS IIR and Galileo IOV (In Orbit Validation) satellites show that the BVH can make the force model computation 30-50 times faster. The ray tracer has an absolute accuracy of several nanonewtons by comparing the test results for spheres and planes with the analytical computations. The multiple reflection effects are investigated both in the intersection number and acceleration on GPS IIR, Galileo IOV and Sentinel-1 spacecraft. Considering the number of intersections, the 3rd reflection can capture 99.12%, 99.14%, and 91.34% of the total reflections for GPS IIR, Galileo IOV satellite bus and the Sentinel-1 spacecraft respectively. In terms of the multiple reflection effects on the acceleration, the secondary reflection effect for Galileo IOV satellite and Sentinel-1 can reach 0.2 nm/s 2 and 0.4 nm/s 2 respectively. The error percentage in the accelerations magnitude results show that the 3rd reflection should be considered in order to make it less than 0.035%. The pixel array resolution tests show that the dimensions of the components have to be considered when choosing the spacing of the pixel in order not to miss some components of the satellite in ray tracing. This paper presents the first systematic and quantitative study of the secondary and higher order intersection effects. It shows conclusively the effect is non-negligible for certain classes of misson.

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Analysis of HY2A precise orbit determination using DORIS

Cited by 18 publications

References 18 publications

Analysis of Precise Orbit Predictions for a HY-2A Satellite with Three Atmospheric Density Models Based on Dynamic Method

Analysis of Precise Orbit Predictions for a HY-2A Satellite with Three Atmospheric Density Models Based on Dynamic Method

Single-Differenced Ambiguity Resolution for Orbit Determination of the Haiyang-2B

Fast solar radiation pressure modelling with ray tracing and multiple reflections

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