[Marc, Shalika, Tsuzuki]

We set up a long term measurement over the week-end without sample (but its holder present) and p-polarized light.

We'll take 1 spectrum / hour.

We also took temperature and humidity sensor from TAMA FC (TSP01) that will provide temperature of the light source, integrating sphere together with temperature and humidity from the table were is located the spectrophotometer.

They will be measured every 900s.

Tsuzuki-san already performed such measurement last year with unpolarized light that showed strong correlation between background transmission and temperature.