Order-per-order weight profiles of disk-integrated stellar spectra in the first (blue) and last (red) exposures of WASP-76 epoch 1 (the lower panel shows a zoom-in of the upper panel). This shows how lower weights are given at the edges of detector orders, at the bottom of telluric lines, and in regions more strongly corrected for Earth’s atmospheric diffusion (i.e., toward blue wavelengths and at the start/end of epochs). The stellar spectrum is not included, as it does not contribute to disk-integrated spectra weighing.