ICID 20 => DARK_WLS_PRNU_UNBINNED

Illumination:

  • Dark (background) measurements corresponding to unbinned White Light Source (WLS) measurements of ICID 21.

Purpose:

  • Unbinned dark (background) measurements corresponding to unbinned White Light Source (LED) measurements.

Location:

  • Eclipse side of the orbit.

Usage:

  • From launch onwards, once per week.

Description:

Dark (background) measurements with the exact same instrument settings as the WLS_PRNU_UNBINNED light measurement of ICID 21. The dark (background) measurements are performed directly prior to the unbinned WLS light measurements on the eclipse side of the orbit with the Sun Aperture Mechanism (SAM) closed and with the Folding Mirror Mechanism (FMM) in the position that blocks all Earth light. The dark (background) measurements are eventually used to correct the light measurements in the 0-1 data processing.