Essays about: "attitude and position determination"

Showing result 1 - 5 of 6 essays containing the words attitude and position determination.

1. 1. Ground Based Attitude Determination Using a SWIR Star Tracker

   University essay from Linköpings universitet/Reglerteknik

   Author : Karl Gudmundson; [2019]
   Keywords : Star Tracking; Celestial Navigation; Navigation Systems; Attitude; Orientation; SWIR; MEKF;

   Abstract : This work investigates the possibility of obtaining attitude estimates by capturing images of stars using a SWIR camera. Today, many autonomous systems rely on the measurements from a GPS to obtain accurate position and attitude estimates. READ MORE

3. 2. Design and fabrication of test-bed for testing attitude determination of spin stablilized spacecraft.

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Venkata Narayana Chowdary Kudaravalli; [2017]
   Keywords : ;

   Abstract :  Attitude determination for a spin stabilized satellite is calibrated. A mock spacecraft and a spin simulation test bed are designed and developed. Spin simulation testbed which provides position data is used to acquire true position data. READ MORE

4. 3. Development of Star Tracker Attitude and Position Determination System for Spacecraft Maneuvering and Docking Facility

   University essay from Luleå tekniska universitet/Rymdteknik

   Author : Serkan Dikmen; [2016]
   Keywords : star sensor; optical sensor; image processing; vision system; OpenCV; star tracker algorithms; voting methods; star catalog; attitude and position determination; star image; ground station; TCP communication; spacecraft maneuvering and docking facility;

   Abstract : Attitude and position determination systems in satellites are absolutely necessary to keep the desired trajectory. A very accurate, reliable and most used sensor for attitude determination is the star tracker, which orient itself in space by observing and comparing star constellations with known star patterns. READ MORE

5. 4. Unscented Kalman Filters for Attitude and Orbit Estimation of a Low Earth Orbit CubeSat

   University essay from KTH/Rymd- och plasmafysik

   Author : Vlad Grigore; [2015]
   Keywords : ;

   Abstract : In this paper two Unscented Kalman Filters (UKF) are implemented to solve the estimation of a satellite's position in orbit and its orientation relative to Earth's Centered Inertial frame. Their aim is to see if an absolute position accuracy of less than 1 km and an orientation estimation to less than 1 0 are possible for a 3U CubeSat with GPS, sun sensors, magnetometers and a star tracker as sensors. READ MORE

6. 5. Enhancement of Positioning and Attitude Estimation Using Raw GPS Data in an Extended Kalman Filter

   University essay from Linköpings universitet/Reglerteknik; Linköpings universitet/Tekniska högskolan

   Author : Jesper Carlsson; [2014]
   Keywords : GPS; attitude determination; pseudorange; tight coupling;

   Abstract : A Global Positioning System (GPS) can be used to estimate an objects position,given that the object has a GPS antenna. However, the system requires informationfrom at least four independent satellites in order to be able to give a positionestimate. READ MORE