Comparison of the signal injection scheme compared to the faster ‘pseudo-injection’ scheme described in Sect. 3.4. Top: direct comparison of the injected spectra using regular injection (black line) and pseudo-injection (red line). Also shown as grey dots are extracted spectral points at the location of the injection. Bottom: CCF outputs using injection (black line) and pseudo-injection (red line), compared to the actual water CCF for planet b (dashed line). The injection and pseudo-injection are both well representative of the real signal.