Searched for: subject%3A%22Star%255C+tracker%22
(1 - 12 of 12)
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Casini, S. (author), Cervone, A. (author), Monna, G.L.E. (author), Gill, E.K.A. (author)
Line-of-Sight (LoS) navigation is an optical navigation technique that exploits the direction to visible celestial bodies, obtained from an onboard imaging system, to estimate the position and velocity of a spacecraft. The directions are fed to an estimation filter, where they are matched with the actual position of the observed bodies,...
journal article 2023
document
van Oorschot, Marijn (author)
Spacecraft navigation and control is difficult in deep space operations. Especially around asteroids, the irregular gravity field increases the difficulty of estimating the spacecraft trajectory. Autonomous navigation can increase the safety and accuracy for orbit proximity operations. Furthermore, it eliminates the need for continuous...
master thesis 2022
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Ali Nawaz, Ali (author)
Though NanoSats are becoming increasingly capable of featuring active payloads, and acquiring inertial data at arcsec level precision; the payload operational duty-cycle largely remains limited by its data downlink capabilities. NanoSat laser communication terminal (LCT) promises 1 Gbps data downlink capabilities. However, LEO to ground free...
master thesis 2020
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Visser, P.N.A.M. (author)
A method for validating the calibration parameters of the six accelerometers on board the Gravity field and steady-state Ocean Circulation Explorer (GOCE) from star tracker observations that was originally tested by an end-to-end simulation, has been updated and applied to real data from GOCE. It is shown that the method provides estimates of...
journal article 2017
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Garu Sanchez, Yeray (author)
Airbus Defence and Space GmbH in Friedrichshafen is the project coordinator of the NEOShield-2 project whose purpose is to develop the technology needed for near-Earth object (NEO) impact prevention. This research is located within the scope of a kinetic impactor mission which typically consists of two spacecraft: impactor and observer. This...
master thesis 2017
document
Visser, G.H. (author)
Many satellites need to know their attitude. A star tracking system is able to provide this information accurately. The objective of this thesis project is to develop a precise, robust and fast algorithm chain for a star tracker that performs better than the currently used algorithms on that star tracker. The performance of this algorithm chain...
master thesis 2017
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Munatsi, P. (author)
Spacecraft attitude refers to the orientation of the spacecraft body axes with respect to the inertial reference frame. Attitude determination and control is the estimation of the current orientation of a satellite and controlling or changing it on demand to reach a desired orientation. The SPS-2 Attitude Control System consists of four modes:...
master thesis 2017
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Fraile Garcia, E. (author)
This Thesis report is written for the space community, specially for people interested in the field of nanosatellites, who know how star trackers work, but are unfamiliar with their operations and limitations in an earth observation mission. To introduce users to the topic, this document is primarily concerned with a single aperture star tracker...
master thesis 2014
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Visser, P.N.A.M. (author)
A method has been developed and tested for estimating calibration parameters for the six accelerometers on board the Gravity field and steady-state Ocean Circulation Explorer (GOCE) from star tracker observations. These six accelerometers are part of the gradiometer, which is the prime instrument on board GOCE. It will be shown that by taking...
journal article 2008
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van Woerkom, P.Th.L.M. (author), Sonnenschein, F.J. (author)
The study deals with the rotational motion of a spin-stabilized spacecraft equipped with a V-slit sun sensor and the X-slit ESA starmapper. Assuming complete absence of an a priori attitude estimate, it is required to produce a rough estimate of the spacecraft attitude motion. It was assumed that sensor misalignments, external torques and...
report 1979
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van Woerkom, P.Th.L.M. (author), Sonnenschein, F.J. (author)
The study deals with the rotational motion of a spin-stabilized spacecraft equipped with a V-slit sun sensor and the X-slit ESA starmapper. Assuming complete absence of an a priori attitude estimate, it is required to produce a rough estimate of the spacecraft attitude motion. It was assumed that sensor misalignments, external torques and...
report 1979
document
Traas, C.R. (author)
The present issue is the second and final part of a report describing the results of a study about digital filtering. The first part is available as the report NLR TR 760U8 U. The report considers a number of digital filtering methods and gives examples of their application. The methods include batch processing methods and recursive methods....
report 1979
Searched for: subject%3A%22Star%255C+tracker%22
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