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The Roman Coronagraph is expected to perform its high-order wavefront sensingand control (HOWFSC) with a ground-in-the-loop scheme due to the computationalcomplexity of the Electric-Field-Conjugation (EFC) algorithm. This schemeprovides the flexibility to alter the HOWFSC algorithm for given scienceobjectives. A new alternative implicit-EFC algorithm is of particular interestas it requires no optical model to create a dark-hole, making the finalcontrast independent of the model accuracy. The intended HOWFSC scheme involvesrunning EFC while observing a bright star such as $\zeta$ Puppis to create theinitial dark-hole, then slew to the science target while maintaining thecontrast with low-order WFSC over the given observation.  Given a similar scheme, the efficacy of iEFC is simulated for two coronagraphmodes, namely the Hybrid Lyot Coronagraph (HLC) and the wide-field-of-viewShaped-Pupil-Coronagraph (SPC-WFOV). End-to-end physical optics models for eachmode serve as the tool for the simulations. Initial monochromatic simulationsare presented and compared with monochromatic EFC results obtained with theFALCO software. Various sets of calibration modes are tested to understand theoptimal modes to use when generating an iEFC response matrix. Further iEFCsimulations are performed using broadband images with the assumption that$\zeta$ Puppis is the stellar object being observed. Shot noise, read noise,and dark current are included in the broadband simulations to determine if iEFCcould be a suitable alternative to EFC for the Roman Coronagraph.

Simulating the efficacy of the implicit-electric-field-conjugation algorithm for the Roman Coronagraph with noise