  The NEID spectrograph on the WIYN 3.5-m telescope at Kitt Peak has completed
its first full year of science operations and is reliably delivering sub-m/s
precision radial velocity measurements. The NEID instrument control system uses
the TIMS package (Bender et al. 2016), which is a client-server software system
built around the twisted python software stack. During science observations,
interaction with the NEID spectrograph is handled through a pair of graphical
user interfaces (GUIs), written in PyQT, which wrap the underlying instrument
control software and provide straightforward and reliable access to the
instrument. Here, we detail the design of these interfaces and present an
overview of their use for NEID operations. Observers can use the NEID GUIs to
set the exposure time, signal-to-noise ratio (SNR) threshold, and other
relevant parameters for observations, configure the calibration bench and
observing mode, track or edit observation metadata, and monitor the current
state of the instrument. These GUIs facilitate automatic spectrograph
configuration and target ingestion from the nightly observing queue, which
improves operational efficiency and consistency across epochs. By interfacing
with the NEID exposure meter, the GUIs also allow observers to monitor the
progress of individual exposures and trigger the shutter on user-defined SNR
thresholds. In addition, inset plots of the instantaneous and cumulative
exposure meter counts as each observation progresses allow for rapid diagnosis
of changing observing conditions as well as guiding failure and other emergent
issues.
