Top: NIRSpec template spectrum of the Orion Bar Atomic PDR (Peeters et al. 2024) with NIRCam filter throughputs, NIRSpec grating wavelength ranges, and NIRSpec wavelength gaps (from Table 3 in Böker et al. 2022) shaded in gray. Flux calibration of the NIRSpec IFU data (Sect. 3.2.1) was carried out using filters colored in green for G235H-F170LP and in red for G395H-F290LP. The calibration factors (A_filter in Eq. (3)) are given in Table 1. The other filters which were included in PDRs4All and observed the Orion Bar are shown in orange. Bottom: MIRI MRS template spectrum (thick black lines) of the Orion Bar Atomic PDR from Chown et al. (2024) and Van De Putte et al. (2024) together with the MIRI filter response functions (thin orange lines) employed in this study (F770W, F1000W, F1130W, and F1500W). We have MIRI images for all of these filters except for F1000W, which is included in the spectroscopy-only part of our analysis (Sect. 4). Flux cross-calibration with F770W and F1130W can only be performed on the stitched MRS cube because these filters span multiple MRS channels. The MRS/MIRI Imager cross-calibration results are shown in Table 2.