Fixed marci ephemeris time difference (#600)

* Fixed marci ephemeris time difference

* Updated Marci load test with new times

* Added Changelog entry

CHANGELOG.md

@@ -50,7 +50,6 @@ release.
 - Changed how push frame sensor drivers compute the `ephemeris_time` property [#595](https://github.com/DOI-USGS/ale/pull/595)
 
 ### Fixed
-
 - Fixed landed sensors to correctly project locally [#590](https://github.com/DOI-USGS/ale/pull/590)
 - Fixed Hayabusa amica center time computation to match ISIS [#592](https://github.com/DOI-USGS/ale/pull/592)
 - Set Lunar Oribter abberation correction to None as it is in ISIS [#593](https://github.com/DOI-USGS/ale/pull/593)
@@ -58,6 +57,7 @@ release.
 - Fixed missing sensor_model_version attribute on VikingIsisLabelNaifSpiceDriver [#583](https://github.com/DOI-USGS/ale/pull/583)
 - Fixed incorrect distortion look up in Orex camera when working with PolyCam images [#583](https://github.com/DOI-USGS/ale/pull/583)
 - Brought timing in line with ISIS for the KaguyaMiIsisLabelNaifSpiceDriver [#599](https://github.com/DOI-USGS/ale/pull/599)
+- Brought timing in line with ISIS for the MroMarciIsisLabelNaifSpiceDriver [#600](https://github.com/DOI-USGS/ale/pull/600)
 
 ## [0.10.0] - 2024-01-08 
 

ale/drivers/mro_drivers.py

+import numpy as np
 import spiceypy as spice
 
 from ale.base import Driver
@@ -180,6 +181,12 @@ class MroMarciIsisLabelNaifSpiceDriver(LineScanner, IsisLabel, NaifSpice, NoDist
             self._ephemeris_stop_time = max(self.compute_marci_time(line))
         return self._ephemeris_stop_time
     
+    @property
+    def ephemeris_time(self):
+        if not hasattr(self, "_ephemeris_time"):
+            self._ephemeris_time = np.linspace(self.ephemeris_start_time, self.ephemeris_stop_time + self.interframe_delay, self.image_lines + 1)
+        return self._ephemeris_time
+
     @property
     def detector_center_line(self):
         """