Centralized Autonomous Orbit Determination of Beidou Satellites Under the Constraint of Anchor Station

2018 ◽  
pp. 409-421
Author(s):  
Xufeng Wen ◽  
Jinming Hao ◽  
Xiaogong Hu ◽  
Chengpan Tang ◽  
Dongxia Wang ◽  
...  
Keyword(s):  
Orbit Determination ◽  
Anchor Station ◽  
Autonomous Orbit Determination ◽  
Beidou Satellites

scholarly journals Precise Orbit Determination of BeiDou Satellites with Contributions from Chinese National Continuous Operating Reference Stations

2017 ◽  
Vol 9 (8) ◽  
pp. 810 ◽  
Author(s):  
Ming Chen ◽  
Yang Liu ◽  
Jiming Guo ◽  
Weiwei Song ◽  
Peng Zhang ◽  
...  
Keyword(s):  
Orbit Determination ◽  
Precise Orbit Determination ◽  
Precise Orbit ◽  
Beidou Satellites

scholarly journals Autonomous Orbit Determination for Lagrangian Navigation Satellite Based on Neural Network Based State Observer

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Youtao Gao ◽  
Tanran Zhao ◽  
Bingyu Jin ◽  
Junkang Chen ◽  
Bo Xu
Keyword(s):  
Neural Network ◽  
Orbit Determination ◽  
Transition Matrix ◽  
State Observer ◽  
Nonlinear Perturbations ◽  
The Neural Network ◽  
Autonomous Orbit Determination ◽  
Simulation Results ◽  
Libration Orbits

In order to improve the accuracy of the dynamical model used in the orbit determination of the Lagrangian navigation satellites, the nonlinear perturbations acting on Lagrangian navigation satellites are estimated by a neural network. A neural network based state observer is applied to autonomously determine the orbits of Lagrangian navigation satellites using only satellite-to-satellite range. This autonomous orbit determination method does not require linearizing the dynamical mode. There is no need to calculate the transition matrix. It is proved that three satellite-to-satellite ranges are needed using this method; therefore, the navigation constellation should include four Lagrangian navigation satellites at least. Four satellites orbiting on the collinear libration orbits are chosen to construct a constellation which is used to demonstrate the utility of this method. Simulation results illustrate that the stable error of autonomous orbit determination is about 10 m. The perturbation can be estimated by the neural network.

A New Algorithm for Onboard Autonomous Orbit Determination of Navigation Satellites

2011 ◽  
Vol 64 (S1) ◽  
pp. S162-S179 ◽  
Author(s):  
Haihong Wang ◽  
Zhonggui Chen ◽  
Jinjun Zheng ◽  
Haibin Chu
Keyword(s):  
Data Processing ◽  
Orbit Determination ◽  
Transition Matrix ◽  
State Transition ◽  
State Transition Matrix ◽  
Processing Unit ◽  
Data Processing Unit ◽  
Autonomous Orbit Determination ◽  
Computing Method

Autonomous orbit determination of a navigation constellation is the process by which the orbit parameters of navigation satellites are autonomously calibrated onboard the satellites without the need for external aids. It commonly uses a satellite onboard data processing unit and a filtering method to process the measurements of inter-satellite ranges. The onboard data processing unit is the main module of autonomous navigation systems. In this paper, the two main factors that affect the accuracy of autonomous orbit determination for a navigation constellation are discussed first, and then a distributed onboard algorithm for autonomous orbit determination of navigation satellites is proposed. This method is based on a long-term ephemeris prediction and is suitable for the satellite hardware capability. The main feature of this method is that both the distributed computing method and an onboard analytical state transition matrix are used to process inter-satellite range measurements. One of the main advantages of this approach is high-speed computing since the amount of calculations needed is significantly less than that of the centralised computing method and those distributed methods that need to use an onboard numerical integrator. Another advantage of this approach is that the use of the onboard analytical state transition matrix algorithm can save a great amount of resources for both ground-to-satellite data transmissions and data storage units in satellites’ hardware. This could result in substantial cost reduction for space missions. Finally, a simulation method used for testing the proposed algorithm is presented. Results of tests over a period of 90 days show that the user range error of autonomous orbit determination derived from the proposed method is less than three metres.

Initial results of centralized autonomous orbit determination of the new-generation BDS satellites with inter-satellite link measurements

2018 ◽  
Vol 92 (10) ◽  
pp. 1155-1169 ◽  
Author(s):  
Chengpan Tang ◽  
Xiaogong Hu ◽  
Shanshi Zhou ◽  
Li Liu ◽  
Junyang Pan ◽  
...  
Keyword(s):  
Orbit Determination ◽  
Satellite Link ◽  
Autonomous Orbit Determination ◽  
New Generation ◽  
Initial Results
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