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The correction methods of water-level measurements and discharge measurements are a important kind of hydrodynamic model real-time correction methods. The existing hydrodynamic model real-time correction methods are almost designed based on Kalman filter. In which, an implicit condition is that the system noises are obeys a Gaussian distribution with known mean and variance. However, in practice,...
This paper deals with the investigation of the impact of relative navigation error on relative semimajor axis (SMA) estimation for formation flying of spacecraft in high earth orbit (HEO). The use of carrier-phase/code-phase differential Global Positioning System(GPS) measurements in relative navigation filters is analyzed, with a particular augmentation of crosslink range measurement when no visible...
A new relative navigation and attitude determination approach was developed for autonomous spacecraft rendezvous in this paper. The approach uses multiple optical line-of-sight vectors observations from spacecraft to another combined with radio measurements. A two order kalman filter was designed to determine relative attitude and position information. The modified rodrigues parameter was used to...
To improve the accuracy and better fault-tolerant performance for ultra-close spacecraft formation flying, a Global Position System (GPS)/Vision based Navigation (VISNAV) integrated Relative Navigation and Attitude Determination (RNAD) approach was presented in this paper. Onboard GPS was used for RNAD for formation spacecraft by multi-antennas configuration. The same RNAD information was also achieved...
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