Essays about: "optical earth observation"

Showing result 1 - 5 of 11 essays containing the words optical earth observation.

  1. 1. Development and Implementation of Techniques for the Simulation and Processing for Future SAR Systems

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Tim Kinnunen; [2023]
    Keywords : Synthetic Aperture Radar; SAR; Reverse Backprojection Algorithm; RBPA; Backprojection Algorithm; SAR simulator; SAR processing;

    Abstract : Synthetic Aperture Radar (SAR) is a type of radar system that can generate high-resolution images with which one can detect subtle changes on the scale of centimetres from space. It can operate in any weather condition and during both day and night, making it unique compared to optical sensors. READ MORE

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

    University essay from Luleå tekniska universitet/Rymdteknik

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

    Abstract : 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. READ MORE

  4. 3. Deep Neural Networks for Object Detection in Satellite Imagery

    University essay from Uppsala universitet/Avdelningen Vi3

    Author : Frederik Fritsch; [2023]
    Keywords : Object Detection; Satellite Imagery; Deep Neural Networks; YOLOv8; xView;

    Abstract : With the development of small satellites it has become easier and cheaper to deploy satellites for earth observation from space. While optical sensors capture high-resolution data, this data is traditionally sent to earth for analysis which puts a high constraint on the data link and increases the time for making data based decisions. READ MORE

  5. 4. Estimating stellar limb darkening using exoplanet transits

    University essay from Lunds universitet/Astrofysik; Lunds universitet/Fysiska institutionen

    Author : Sora Ishida; [2023]
    Keywords : Limb-darkening; CHEOPS; Transit; Exoplanet; PYCHEOPS; Physics and Astronomy;

    Abstract : The brightness of the stars is not uniform over the surface as it varies depending on the wavelength and the atmosphere that the light propagates. Limb darkening is an optical effect caused by a decrease in brightness of the star towards the edge. READ MORE

  6. 5. Improving the safe mode robustness of an Earth observation satellite

    University essay from KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Author : Guillaume Trimoreau; [2022]
    Keywords : avoidance; dazzling; magnetic control; Monte Carlo; safe mode; simulation; tuning; solundvikelsemanöver; solbländning; magnetisk kontroll; Monte Carlo-metoden; säkra läget; simulation; inställning;

    Abstract : Airbus Defence and Space is developing an Earth observation platform. The payload of that platform is an optical instrument, which has to be protected from Sun dazzling in order to preserve its integrity. READ MORE