Number of independent wavelengths used in the computation of the mean spectral resolution. The values trended here are for the red sensitive MIT detector, the 300V grism with no filter and a slit width of 0.29".
On 2018-08-28 new pipeline (v.5.3.35) was introduced. The method of calculating the number of wavelengths used changed. The new values are significantly lower.
DB Name: fors2_lss_wave
TPL.ID: FORS2_lss_cal_daycalib
QC1 DB parameter: nwave