diff --git a/python/lsst/summit/utils/efdUtils.py b/python/lsst/summit/utils/efdUtils.py
index d6d3512c..0f46250a 100644
--- a/python/lsst/summit/utils/efdUtils.py
+++ b/python/lsst/summit/utils/efdUtils.py
@@ -832,6 +832,8 @@ def getCommands(
                     timeKey = time.to_pydatetime()
 
             if timeKey in commandTimes:
-                raise ValueError(f"There is already a command at {timeKey=} - make a better data structure!")
+                msg = f"There is already a command at {timeKey=} - make a better data structure!"
+                msg += f"Colliding commands = {commandTimes[timeKey]} and {command}"
+                raise ValueError(msg)
             commandTimes[timeKey] = command
     return commandTimes
diff --git a/python/lsst/summit/utils/simonyi/__init__.py b/python/lsst/summit/utils/simonyi/__init__.py
new file mode 100644
index 00000000..83c18f36
--- /dev/null
+++ b/python/lsst/summit/utils/simonyi/__init__.py
@@ -0,0 +1,22 @@
+# This file is part of summit_utils.
+#
+# Developed for the LSST Data Management System.
+# This product includes software developed by the LSST Project
+# (https://www.lsst.org).
+# See the COPYRIGHT file at the top-level directory of this distribution
+# for details of code ownership.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+from .mountData import *
diff --git a/python/lsst/summit/utils/simonyi/mountAnalysis.py b/python/lsst/summit/utils/simonyi/mountAnalysis.py
new file mode 100644
index 00000000..5fad628a
--- /dev/null
+++ b/python/lsst/summit/utils/simonyi/mountAnalysis.py
@@ -0,0 +1,359 @@
+# This file is part of summit_utils.
+#
+# Developed for the LSST Data Management System.
+# This product includes software developed by the LSST Project
+# (https://www.lsst.org).
+# See the COPYRIGHT file at the top-level directory of this distribution
+# for details of code ownership.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+__all__ = ["calculateMountErrors", "plotMountErrors"]
+
+import logging
+from dataclasses import dataclass
+from typing import TYPE_CHECKING
+from zoneinfo import ZoneInfo
+
+import matplotlib.dates as mdates
+import matplotlib.pyplot as plt
+import numpy as np
+from matplotlib.dates import num2date
+from matplotlib.ticker import FuncFormatter
+
+from lsst.summit.utils.tmaUtils import filterBadValues
+from lsst.summit.utils.utils import dayObsIntToString
+
+from .mountData import getAzElRotDataForExposure
+
+if TYPE_CHECKING:
+    from lsst_efd_client import EfdClient
+    from matplotlib.figure import Figure
+
+    from lsst.daf.butler import DimensionRecord
+
+    from .mountData import MountData
+
+
+NON_TRACKING_IMAGE_TYPES = ["BIAS", "FLAT"]
+
+COMCAM_ANGLE_TO_EDGE_OF_FIELD_ARCSEC = 1800.0
+LSSTCAM_ANGLE_TO_EDGE_OF_FIELD_ARCSEC = 8500.0
+
+# These levels determine the colouring of the cells in the RubinTV.
+# Yellow for warning level, red for bad level
+MOUNT_IMAGE_WARNING_LEVEL = 0.05
+MOUNT_IMAGE_BAD_LEVEL = 0.10  # and red for this
+
+N_REPLACED_WARNING_LEVEL = 999999  # fill these values in once you've spoken to Craig and Brian
+N_REPLACED_BAD_LEVEL = 999999  # fill these values in once you've spoken to Craig and Brian
+
+
+@dataclass
+class MountErrors:
+    azRms: float
+    elRms: float
+    rotRms: float
+    imageAzRms: float
+    imageElRms: float
+    imageRotRms: float
+    imageImpactRms: float
+    residualFiltering: bool
+    nReplacedAz: int
+    nReplacedEl: int
+
+
+def tickFormatter(value: float, tick_number: float) -> str:
+    # Convert the value to a string without subtracting large numbers
+    # tick_number is unused.
+    return f"{value:.2f}"
+
+
+def calculateMountErrors(
+    expRecord: DimensionRecord,
+    client: EfdClient,
+    maxDelta=0.1,
+    doFilterResiduals=True,
+) -> tuple[MountErrors, MountData] | tuple[None, None]:
+    """Queries EFD for a given exposure and calculates the RMS errors in the
+    axes during the exposure, optionally plotting and saving the data.
+    """
+    logger = logging.getLogger(__name__)
+
+    imgType = expRecord.observation_type.upper()
+    if imgType in NON_TRACKING_IMAGE_TYPES:
+        logger.info(f"Skipping mount torques for non-tracking image type {imgType} for {expRecord.id}")
+        return None, None
+
+    mountData = getAzElRotDataForExposure(client, expRecord)
+
+    elevation = 90 - expRecord.zenith_angle
+
+    azError = mountData.azimuthData["azError"].to_numpy()
+    elError = mountData.elevationData["elError"].to_numpy()
+    rotError = mountData.rotationData["rotError"].to_numpy()
+    nReplacedAz = 0
+    nReplacedEl = 0
+    if doFilterResiduals:
+        # Filtering out bad values
+        nReplacedAz = filterBadValues(azError, maxDelta)
+        nReplacedEl = filterBadValues(elError, maxDelta)
+        mountData.azimuthData["azError"] = azError
+        mountData.elevationData["elError"] = elError
+    azRms = np.sqrt(np.mean(azError * azError))
+    elRms = np.sqrt(np.mean(elError * elError))
+    rotRms = np.sqrt(np.mean(rotError * rotError))
+
+    # Calculate Image impact RMS
+    imageAzRms = azRms * np.cos(elevation * np.pi / 180.0)
+    imageElRms = elRms
+    imageRotRms = rotRms * COMCAM_ANGLE_TO_EDGE_OF_FIELD_ARCSEC * np.pi / 180.0 / 3600.0
+    imageImpactRms = np.sqrt(imageAzRms**2 + imageElRms**2 + imageRotRms**2)
+
+    mountErrors = MountErrors(
+        azRms=azRms,
+        elRms=elRms,
+        rotRms=rotRms,
+        imageAzRms=imageAzRms,
+        imageElRms=imageElRms,
+        imageRotRms=imageRotRms,
+        imageImpactRms=imageImpactRms,
+        residualFiltering=doFilterResiduals,
+        nReplacedAz=nReplacedAz,
+        nReplacedEl=nReplacedEl,
+    )
+
+    return (mountErrors, mountData)
+
+
+def plotMountErrors(
+    mountData: MountData,
+    mountErrors: MountErrors,
+    figure=None,
+    saveFilename: str = "",
+) -> Figure:
+    imageImpactRms = mountErrors.imageImpactRms
+    expRecord = mountData.expRecord
+    if expRecord is not None:
+        dayObsString = dayObsIntToString(expRecord.day_obs)
+        dataIdString = f"{expRecord.instrument} {dayObsString} - seqNum {expRecord.seq_num}"
+        title = f"{dataIdString} - Exposure time = {expRecord.exposure_time:.1f}s"
+
+    if figure is None:
+        figure = plt.figure(figsize=(12, 8))
+    else:
+        figure.clear()
+        ax = figure.gca()
+        ax.clear()
+
+    utc = ZoneInfo("UTC")
+    chile_tz = ZoneInfo("America/Santiago")
+
+    # Function to convert UTC to Chilean time
+    def offset_time_aware(utc_time):
+        # Ensure the time is timezone-aware in UTC
+        if utc_time.tzinfo is None:
+            utc_time = utc.localize(utc_time)
+        return utc_time.astimezone(chile_tz)
+
+    [[ax1, ax4], [ax2, ax5], [ax3, ax6]] = figure.subplots(
+        3,
+        2,
+        sharex="col",
+        sharey=False,
+        gridspec_kw={"wspace": 0.25, "hspace": 0, "height_ratios": [2.5, 1, 1], "width_ratios": [1.5, 1]},
+    )
+    # [ax1, ax4] = [azimuth, rotator]
+    # [ax2, ax5] = [azError, rotError]
+    # [ax3, ax6] = [azTorque, rotTorque]
+
+    # Use the native color cycle for the lines. Because they're on
+    # different axes they don't cycle by themselves
+    axs = [ax1, ax2, ax3, ax4, ax5, ax6]
+    lineColors = [p["color"] for p in plt.rcParams["axes.prop_cycle"]]
+    nColors = len(lineColors)
+    colorCounter = 0
+
+    ax1.plot(
+        mountData.azimuthData["actualPosition"],
+        label="Azimuth position",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+    ax1.yaxis.set_major_formatter(FuncFormatter(tickFormatter))
+    ax1.set_ylabel("Azimuth (degrees)")
+
+    ax1_twin = ax1.twinx()
+    ax1_twin.plot(
+        mountData.elevationData["actualPosition"],
+        label="Elevation position",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+
+    ax2.plot(
+        mountData.azimuthData["azError"],
+        label="Azimuth tracking error",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+    ax2.plot(
+        mountData.elevationData["elError"],
+        label="Elevation tracking error",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+    ax2.axhline(0.01, ls="-.", color="black")
+    ax2.axhline(-0.01, ls="-.", color="black")
+    ax2.yaxis.set_major_formatter(FuncFormatter(tickFormatter))
+    ax2.set_ylabel("Tracking error (arcsec)")
+    ax2.set_xticks([])  # remove x tick labels on the hidden upper x-axis
+    ax2.set_ylim(-0.05, 0.05)
+    ax2.set_yticks([-0.04, -0.02, 0.0, 0.02, 0.04])
+    ax2.legend()
+    ax2.text(0.1, 0.9, f"Image impact RMS = {imageImpactRms:.3f} arcsec (with rot).", transform=ax2.transAxes)
+    if mountErrors.residualFiltering:
+        ax2.text(
+            0.1,
+            0.8,
+            (
+                f"{mountErrors.nReplacedAz} bad az values and "
+                f"{mountErrors.nReplacedEl} bad el values were replaced"
+            ),
+            transform=ax2.transAxes,
+        )
+    ax3_twin = ax3.twinx()
+    ax3.plot(
+        mountData.azimuthData["actualTorque"],
+        label="Azimuth torque",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+    ax3_twin.plot(
+        mountData.elevationData["actualTorque"],
+        label="Elevation torque",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+    ax3.set_ylabel("Azimuth torque (Nm)")
+    ax3_twin.set_ylabel("Elevation torque (Nm)")
+    ax3.set_xlabel("Time (UTC)")  # yes, it really is UTC, matplotlib converts this automatically!
+
+    # put the ticks at an angle, and right align with the tick marks
+    ax3.set_xticks(ax3.get_xticks())  # needed to supress a user warning
+    xlabels = ax3.get_xticks()
+    ax3.set_xticklabels(xlabels)
+    ax3.tick_params(axis="x", rotation=45)
+    ax3.xaxis.set_major_locator(mdates.AutoDateLocator())
+    ax3.xaxis.set_major_formatter(mdates.DateFormatter("%H:%M:%S"))
+
+    ax4.plot(
+        mountData.rotationData["actualPosition"],
+        label="Rotator position",
+        c=lineColors[colorCounter % nColors],
+    )
+    colorCounter += 1
+    ax4.yaxis.set_major_formatter(FuncFormatter(tickFormatter))
+    ax4.yaxis.tick_right()
+    ax4.set_ylabel("Rotator angle (degrees)")
+    ax4.yaxis.set_label_position("right")
+    ax5.plot(
+        mountData.rotationData["rotError"],
+        c=lineColors[colorCounter % nColors],
+    )
+
+    colorCounter += 1
+    ax5.axhline(0.1, ls="-.", color="black")
+    ax5.axhline(-0.1, ls="-.", color="black")
+    ax5.yaxis.set_major_formatter(FuncFormatter(tickFormatter))
+    ax5.set_ylabel("Tracking error (arcsec)")
+    ax5.tick_params(labelbottom=False)  # Hide x-axis tick labels without removing ticks
+    ax5.set_ylim(-0.5, 0.5)
+    ax5.set_yticks([-0.4, -0.2, 0.0, 0.2, 0.4])
+    ax5.yaxis.tick_right()
+    ax5.yaxis.set_label_position("right")
+
+    ax6.plot(mountData.rotationTorques["torque0"], label="Torque0", c=lineColors[colorCounter % nColors])
+    colorCounter += 1
+    ax6.plot(mountData.rotationTorques["torque1"], label="Torque1", c=lineColors[colorCounter % nColors])
+    ax6.set_ylabel("Rotator torque (Nm)")
+    ax6.set_xlabel("Time (UTC)")  # yes, it really is UTC, matplotlib converts this automatically!
+    # put the ticks at an angle, and right align with the tick marks
+    ax6.set_xticks(ax6.get_xticks())  # needed to supress a user warning
+    xlabels = ax6.get_xticks()
+    ax6.set_xticklabels(xlabels)
+    ax6.tick_params(axis="x", rotation=45)
+    ax6.xaxis.set_major_locator(mdates.AutoDateLocator())
+    ax6.xaxis.set_major_formatter(mdates.DateFormatter("%H:%M:%S"))
+    ax6.yaxis.tick_right()
+    ax6.yaxis.set_label_position("right")
+    ax6.legend()
+
+    ax1_twin.yaxis.set_major_formatter(FuncFormatter(tickFormatter))
+    ax1_twin.set_ylabel("Elevation (degrees)")
+    ax1.tick_params(labelbottom=False)  # Hide x-axis tick labels without removing ticks
+    # combine the legends and put inside the plot
+    handles1a, labels1a = ax1.get_legend_handles_labels()
+    handles1b, labels1b = ax1_twin.get_legend_handles_labels()
+    handles2a, labels2a = ax3.get_legend_handles_labels()
+    handles2b, labels2b = ax3_twin.get_legend_handles_labels()
+    handles = handles1a + handles1b + handles2a + handles2b
+    labels = labels1a + labels1b + labels2a + labels2b
+    # ax2 is "in front" of ax1 because it has the vlines plotted on it, and
+    # vlines are on ax2 so that they appear at the bottom of the legend, so
+    # make sure to plot the legend on ax2, otherwise the vlines will go on
+    # top of the otherwise-opaque legend.
+    ax1_twin.legend(handles, labels, facecolor="white", framealpha=1)
+
+    ax1.set_title("Azimuth and Elevation")
+    ax4.set_title("Rotator")
+    figure.subplots_adjust(top=0.85)  # Adjust the top margin to make room for the suptitle
+    figure.suptitle(title, fontsize=14, y=1.04)  # Adjust y to move the title up
+
+    # Create the upper axis for Chilean time
+    ax1_twiny = ax1.twiny()
+    ax1_twiny.set_xlim(ax1.get_xlim())  # Set the limits of the upper axis to match the lower axis
+    utcTicks = ax1.get_xticks()  # Use the same ticks as the lower UTC axis
+    utcTickLabels = [num2date(tick, tz=utc) for tick in utcTicks]
+    chileTickLabels = [offset_time_aware(label) for label in utcTickLabels]
+    # Set the same tick positions but with Chilean time labels
+    ax1_twiny.set_xticks(utcTicks)
+    ax1_twiny.set_xticklabels([tick.strftime("%H:%M:%S") for tick in chileTickLabels])
+    ax1_twiny.tick_params(axis="x", rotation=45)
+    ax1_twiny.set_xlabel("Time (Chilean Time)")
+
+    ax4_twiny = ax4.twiny()
+    ax4_twiny.set_xlim(ax4.get_xlim())  # Set the limits of the upper axis to match the lower axis
+    utcTicks = ax4.get_xticks()  # Use the same ticks as the lower UTC axis
+    utcTickLabels = [num2date(tick, tz=utc) for tick in utcTicks]
+    chileTickLabels = [offset_time_aware(label) for label in utcTickLabels]
+    # Set the same tick positions but with Chilean time labels
+    ax4_twiny.set_xticks(utcTicks)
+    ax4_twiny.set_xticklabels([tick.strftime("%H:%M:%S") for tick in chileTickLabels])
+    ax4_twiny.tick_params(axis="x", rotation=45)
+    ax4_twiny.set_xlabel("Time (Chilean Time)")
+
+    # Add exposure start and end:
+    for ax in axs:
+        if expRecord is not None:
+            # assert expRecord is not None, "expRecord is None"
+            ax.axvline(expRecord.timespan.begin.utc.datetime, ls="--", color="green")
+            ax.axvline(expRecord.timespan.end.utc.datetime, ls="--", color="red")
+
+    if saveFilename:
+        figure.savefig(saveFilename, bbox_inches="tight")
+
+    return figure
diff --git a/python/lsst/summit/utils/simonyi/mountData.py b/python/lsst/summit/utils/simonyi/mountData.py
new file mode 100644
index 00000000..df75f4d3
--- /dev/null
+++ b/python/lsst/summit/utils/simonyi/mountData.py
@@ -0,0 +1,115 @@
+# This file is part of summit_utils.
+#
+# Developed for the LSST Data Management System.
+# This product includes software developed by the LSST Project
+# (https://www.lsst.org).
+# See the COPYRIGHT file at the top-level directory of this distribution
+# for details of code ownership.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import TYPE_CHECKING
+
+from ..efdUtils import getEfdData
+
+if TYPE_CHECKING:
+    from astropy.time import Time
+    from lsst_efd_client import EfdClient
+    from pandas import DataFrame
+
+    from lsst.daf.butler import DimensionRecord
+
+
+@dataclass
+class MountData:
+    begin: Time
+    end: Time
+    azimuthData: DataFrame
+    elevationData: DataFrame
+    rotationData: DataFrame
+    rotationTorques: DataFrame
+    includedPrePadding: float
+    includedPostPadding: float
+    expRecord: DimensionRecord | None
+
+
+def getAzElRotDataForPeriod(
+    client: EfdClient, begin: Time, end: Time, prePadding: float = 0, postPadding: float = 0
+) -> MountData:
+    azimuthData = getEfdData(
+        client,
+        "lsst.sal.MTMount.azimuth",
+        begin=begin,
+        end=end,
+        prePadding=prePadding,
+        postPadding=postPadding,
+    )
+    elevationData = getEfdData(
+        client,
+        "lsst.sal.MTMount.elevation",
+        begin=begin,
+        end=end,
+        prePadding=prePadding,
+        postPadding=postPadding,
+    )
+    rotationData = getEfdData(
+        client,
+        "lsst.sal.MTRotator.rotation",
+        begin=begin,
+        end=end,
+        prePadding=prePadding,
+        postPadding=postPadding,
+    )
+    rotationTorques = getEfdData(
+        client,
+        "lsst.sal.MTRotator.motors",
+        begin=begin,
+        end=end,
+        prePadding=prePadding,
+        postPadding=postPadding,
+    )
+
+    azValues = azimuthData["actualPosition"].to_numpy()
+    elValues = elevationData["actualPosition"].to_numpy()
+    rotValues = rotationData["actualPosition"].to_numpy()
+    azDemand = azimuthData["demandPosition"].to_numpy()
+    elDemand = elevationData["demandPosition"].to_numpy()
+    rotDemand = rotationData["demandPosition"].to_numpy()
+
+    azError = (azValues - azDemand) * 3600
+    elError = (elValues - elDemand) * 3600
+    rotError = (rotValues - rotDemand) * 3600
+
+    azimuthData["azError"] = azError
+    elevationData["elError"] = elError
+    rotationData["rotError"] = rotError
+
+    mountData = MountData(
+        begin, end, azimuthData, elevationData, rotationData, rotationTorques, prePadding, postPadding, None
+    )
+    return mountData
+
+
+def getAzElRotDataForExposure(
+    client: EfdClient, expRecord: DimensionRecord, prePadding: float = 0, postPadding: float = 0
+) -> MountData:
+
+    begin = expRecord.timespan.begin
+    end = expRecord.timespan.end
+    mountData = getAzElRotDataForPeriod(client, begin, end, prePadding, postPadding)
+    mountData.expRecord = expRecord
+    return mountData