TOPIC 7 - AUDIO TO MEMORIZE SHIT

Earth Orbits: LEO and GEO

  • LEO (Low Earth Orbit)
    • Advantages:
      • Closer to Earth.
      • Higher spatial resolution.
    • Disadvantages:
      • Lower temporal resolution.
      • Limited area coverage.
      • Cannot provide continuous monitoring.
  • GEO (Geostationary Orbit)
    • Advantages:
      • Continuous monitoring.
    • Disadvantages:
      • Lower spatial resolution (less detail).

Types of Satellite Data

  • Optical Data
    • Analogy: Like a normal picture.
    • Advantages:
      • Very detailed and close-up.
      • High spatial resolution and sensitivity.
    • Disadvantages:
      • Can be quite expensive.
      • Often used commercially.
  • Multispectral Data
    • Capabilities: Detects colors beyond human vision.
    • Applications:
      • Detecting vegetation cover.
      • Assessing the state of soils.
    • Advantages:
      • Enables analysis of features invisible to the human eye.
    • Disadvantages:
      • Lower sensitivity and resolution compared to optical data.
      • Can be harder to interpret due to the presence of more colors.
  • Radar Data
    • Functionality: Emits and receives radio signals.
    • Advantages:
      • Works well at night.
      • Can penetrate clouds.
    • Disadvantages:
      • Very low spatial resolution.
      • Overall low resolution.
      • Harder to interpret (black and white imagery).
  • Atmospheric Data
    • Purpose: Monitors chemical reactions in the atmosphere.
    • Applications:
      • Targeting gases like nitrogen dioxide ($\NO_2$) and carbon monoxide ($\CO$).
    • Advantages:
      • Provides a tool for assessing air quality levels.
    • Disadvantages:
      • Very low resolution.
      • Can be complex to model.

Overall Advantages of Satellite Data

  • Observing phenomena on a greater scale.
  • Accessing remote or inaccessible areas.
  • Objective data collection.
  • Enables regional comparisons without field biases.

Disadvantages of Satellite Data

  • High cost, limiting accessibility.
  • Impact of cloud cover on data quality (except for radar and atmospheric data).
  • Necessity of ground truthing to validate satellite data (e.g., verifying soil infertility).

Trade-off

  • Trade-off between spatial and temporal resolution: cannot achieve continuous monitoring with the highest resolution in one area. Balancing these factors is essential based on the application.