Comparison between the UVS background signal and the CRS count rate for protons above 70 MeV (hereafter IPGH), since 1992 (top). The color scale refers to time, and serves to separate pre- and post-jump data and to allow comparisons to Fig. 3. The two signals, although being fully independent measurements, are strikingly similar, allowing informative comparisons. Their ratio is displayed as a function of time (bottom panel). The global decrease and the temporary increases around the 1999−2003 solar maximum show that the energy range for UVS is globally higher than for the IPGH channel.