Marine remote sensing toolkit

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BRG The University of Queensland
Fundamentals

- Main page
- Pre-processing
  - Image acquisition
  - When to correct
  - Correction types
    - Radiometric
    - Atmospheric
    - Geometric
  - Masking
- Field data collection
- Mapping approaches
- Change and trends
- Delivery

# Absolute atmospheric corrections

"Absolute" correction uses atmospheric conditions and illumination and viewing geometries at the time of image acquisition to estimate the amount of scattering and absorption in each image band, and derives correction factors to re-scale the data from at-sensor to at-surface values.

Absolute atmospheric correction needs access to:

- suitable information on atmospheric conditions across the atmosphere in the imaged area
- radiative transfer code (e.g. Modtran, 6-S)
- software for implementation of correction algorithms in a programming environment (e.g. ENVI-IDL) or automated form (e.g. ENVI FLAASH)

## References:

Jensen, JR (2005). Introductory digital image processing: a remote sensing perspective. Third edition, Prentice Hall: 316p.