Distributions of RMS noise level of the GLOSTAR B-configuration images (Fig. 1). The bin width is 0.002 mly beam⁻¹. The red, blue and black histograms represent values determined for the region discussed here (2° < ℓ < 28°, 36° < ℓ < 40°, and 56° < ℓ < 60°), the pilot region (28° < ℓ < 36°) published in Dzib et al. (2023), and the combined area 2° < ℓ < 40°, 56° < ℓ < 60° area. The median RMS noise level is ~ 0.08 mJy beam⁻¹ and 95% of the fields have a noise level < 0.13 mJy beam⁻¹.