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Remote Sensing

Remote Sensing. What is Remote Sensing?. “The acquisition of information about an object without being in physical contact with it." (Charles Elachi) Value is the Ability to Acquire a lot of information In a very short time With minimal labor input. Platforms.

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Remote Sensing

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  1. Remote Sensing

  2. What is Remote Sensing? • “The acquisition of information about an object without being in physical contact with it." (Charles Elachi) • Value is the Ability to • Acquire a lot of information • In a very short time • With minimal labor input

  3. Platforms • Done with many different platforms • Satellites • Aircraft • Mobile Platform Precision Agriculture – Lesson 4

  4. Interaction Precision Agriculture – Lesson 4

  5. Electromagnetic Energy • Involves the measurement of electromagnetic energy Precision Agriculture – Lesson 4

  6. Electromagnetic Spectrum Precision Agriculture – Lesson 4

  7. Indices • Normalized Difference Vegetation Index (NDVI) • (NIR - VIS)/(NIR + VIS) • Calibrated Vegetation Map • Enhanced Vegetation Index (EVI) • Vegetation Change Map • Greenness Index • Soil Color Map

  8. Indices Precision Agriculture – Lesson 4

  9. Measures of Performance • Spatial Resolution • Spectral Response • Spectral Resolution • Frequency of Coverage Precision Agriculture – Lesson 4

  10. Spatial Resolution • The size of the smallest object that can be distinguished in an image. Precision Agriculture – Lesson 4

  11. Spectral Response • The ability to respond to radiation measurements within a spectral band. Precision Agriculture – Lesson 4

  12. Spectral Resolution • The ability to differentiate between electromagnetic radiation of different wavelengths. Landsat TM image (bands 6-4-2) Alto Image (comparable bands Precision Agriculture – Lesson 4

  13. Frequency of Coverage • How often a sensing system is available to collect data.

  14. Other Considerations • Timeliness of Provider • Cost of Service • Projection and Coordinate System Used • Ground Truthing

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