  The current proposal for the High Latitude Time Domain Survey (HLTDS) is two
tiers (wide and deep) of multi-band imaging and prism spectroscopy with a
cadence of five days (Rose et al., 2021). The five-day cadence is motivated by
the desire to measure mid-redshift SNe where time dilation is modest as well as
to better photometrically characterize the transients detected. This white
paper does not provide a conclusion as to the best cadence for the HLTDS.
Rather, it collects a set of considerations that should be used for a careful
study of cadence by a future committee optimizing the Roman survey. This study
should optimize the HLTDS for both SN Ia cosmology and other transient science.
