Sökning: "Two-line elements"

Hittade 5 uppsatser innehållade orden Two-line elements.

1. 1. Initial Orbit Determination of Resident Space Objects From A Passive Optical Imaging System: : Application to Space Situational Awareness

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Jessica McKenna; [2023]
   Nyckelord :Space Situational Awareness; Space Science; Angles-Only Initial Orbit Determination;

   Sammanfattning : The probability of satellite collisions and disintegrations cluttering the near-Earth orbital environmentis ever-growing. This is especially true for the congested Low Earth Orbit (LEO) regime; once a critical density of objects is reached, a collisional cascading is projected to generate runaway growth of theorbital population. LÄS MER

3. 2. Simulation of Precise Automatic Radio Frequency GroundStation Tracking For S-Band Satellites

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Akila Wajirakumara; [2021]
   Nyckelord :;

   Sammanfattning : Satellites are often known for possessing invariable motion causing its apparent position to drift in the sky from the perspective of a ground station. If these irregular drifts are not compensated, the performance of the communication link would be greatly affected. Hence, the satellite motion has to be tracked by the ground station antenna. LÄS MER

4. 3. Combined Heuristic and Statistical Methodologies applied to Maneuver Detection in the SST Observation Correlation Process

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Arvind Mukundan; [2020]
   Nyckelord :Space Situational Awareness; Two Line Elements; Simplified Perturbations Model;

   Sammanfattning : In this project, an algorithm has been proposed to detect a satellite’s maneuver by comparingthe orbital elements observed from the two line element data and the orbital elements propagatedwith the help of Simplified perturbations models. A set of TLE data for an object orbiting Earthcontains a specific set of orbital elements. LÄS MER

5. 4. Detection of in-plane orbital manoeuvres from a catalogue of geostationary objects

   Master-uppsats, Luleå tekniska universitet/Rymdteknik

   Författare :Phuong Linh Ngo; [2020]
   Nyckelord :manoeuvre detection; geostationary orbit; perturbations; filters; Two-line elements; station keeping;

   Sammanfattning : The number of man-made space objects is dramatically growing nowadays. The continuous monitoring and studying of these objects are necessary to keep their number under control and ensure safe space operations. LÄS MER

7. 5. Simultaneous detection of potassium, water vapor and temperature with tunable diode laser absorption spectroscopy

   Master-uppsats, Umeå universitet/Institutionen för fysik

   Författare :Edvin Norén; [2015]
   Nyckelord :TDLAS; DAS; WMS; Simultaneous detection; Measurement; Potassium; Water vapor; Temperature; Biomass; Optics;

   Sammanfattning : Existing tunable diode laser absorption spectroscopy (TDLAS) sensors for potassium (K) and for water vapor (H2O) and temperature were combined to enable simultaneous measurements in combustion and gasification processes. In-situ real-time detection of the above mentioned combustion parameters will improve the understanding of ash-formation during thermochemical conversion of biomass. LÄS MER