Derivation of VCDtrop from SCDtotal

As part of the retrieval of data from remote sensing, therefore, we need to convert the SCDtotal measurements made for each pixel scanned by the satellite instrument into VCDtrop values.

Fig 3.4.1.4.1: Derivation of VCDtrop from SCDtotal.

Image: AT2-ELS

This derivation is carried out in four retrieval stages.

  1. Determination of the total slant column density, SCDtotal.
  2. Determination of the stratospheric slant column density, SCDstrat.
  3. Derivation of the tropospheric slant column density, SCDtrop
  4. Derivation of the tropospheric slant column density, VCDtrop

These stages are considered in detail in the following steps.