  Although the Transiting Exoplanet Survey Satellite (TESS) primary mission
observed the northern and southern ecliptic hemispheres, generally avoiding the
ecliptic, and the Kepler space telescope during the K2 mission could only
observe near the ecliptic, many of the K2 fields extend far enough from the
ecliptic plane that sections overlap with TESS fields. Using photometric
observations from both K2 and TESS, combined with archival spectroscopic
observations, we globally modeled four known planetary systems discovered by K2
that were observed in the first year of the primary TESS mission. Specifically,
we provide updated ephemerides and system parameters for K2-114 b, K2-167 b,
K2-237 b, and K2-261 b. These were some of the first K2 planets to be observed
by TESS in the first year and include three Jovian sized planets and a
sub-Neptune with orbital periods less than 12 days. In each case, the updated
ephemeris significantly reduces the uncertainty in prediction of future times
of transit, which is valuable for planning observations with the James Webb
Space Telescope and other future facilities. The TESS extended mission is
expected to observe about half of the K2 fields, providing the opportunity to
perform this type of analysis on a larger number of systems.
