Sumários

Introduction to orbit mechanics - II

30 Outubro 2025, 11:30 • André Maria da Silva Dias Moitinho de Almeida

  • Orbit Observation and determination:
    • Two/Three Line Elements (TLSs)
    • Simplified Perturbation models (SGP, SGP4, SDP4, SGP8 and SDP8)
  • Orbit types 
    • LEO
    • GEO
    • Molniya
    • Polar
    • MEO and Satellite constellations

CCD image processing (Part V)

28 Outubro 2025, 09:00 • André Maria da Silva Dias Moitinho de Almeida

Shutter effects

  • Creation and analysis of  shutter timing images
  • High frequency filtering (noise filtering): "boxcar" mean and median filtering
  • Correction of shutter timing in flatfield and object images

Introduction to orbit mechanics - I

28 Outubro 2025, 08:00 • André Maria da Silva Dias Moitinho de Almeida

  • Space Situation Awareness
    • Distribution of orbital objects
    • Types and sizes of orbital objects
    • Risks
  • Orbit Description
    • Ground traces
    • Orbit description: Keplerian elements
Further reading:
Chapter 4 of Fortescue et al. (Spacecraft Systems Engineering)

Telescopes, instruments and astronomical observatories - IV

23 Outubro 2025, 11:30 • André Maria da Silva Dias Moitinho de Almeida

  • Presentation of some of the best observatories in the world: Paranal, Mauna Kea, La Palma
  • The great telescopes of the next decade: the Extremely Large Telescopes, E-ELT, TMT and GMT
  • Astronomical observations in space. Reasons and presentation of recent ESA missions.
  • Radio telescopes (single dish and interferometry)
  • High energy observations: X-rays and gamma rays

CCD image processing (Part IV)

21 Outubro 2025, 09:00 • André Maria da Silva Dias Moitinho de Almeida

  • Flatfield correction
    • Combination of flat field images for each band.
    • Examination of the combined images.
    • Identification and fixing of artifacts in the combined flats.
    • Application of flat-field corrections.
    • Examination of the final images.