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Calibration assessment over desert site

Calibration assessment over desert site. Eric Vermote. Surface Reflectance (smoothed) observed over desert site –band 1. Surface Reflectance (smoothed) observed over desert site –band 2. Method for monitoring degradation.

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Calibration assessment over desert site

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  1. Calibration assessment over desert site Eric Vermote

  2. Surface Reflectance (smoothed) observed over desert site –band 1

  3. Surface Reflectance (smoothed) observed over desert site –band 2

  4. Method for monitoring degradation Where the offset (between -8 and 8) is chosen to match viewing geometry (or AOI) Where i is between 0 and 15

  5. Aqua band 1 Terra band 1 Terra band 2 Aqua band 2

  6. Terra Band 1

  7. Terra Band 2

  8. Aqua Band 1

  9. Aqua Band 2

  10. Conclusion • The jump observed in Terra band 1 and 2 surface reflectance is in part of fully due to degradation not accounted for in collection 5 Level 1B due to introduction of extra solar diffuser degradation in April 2009 for almost all bands (1 to 4 and 8 – 19) 1.3% decrease in m1 -> 1.3% decrease in TOA reflectance

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