Small fix

python/lsst/ts/observatory/control/base_tcs.py

@@ -861,11 +861,9 @@ async def slew_to_planet(
     # implemented.
     async def slew_ephem_target(
         self,
-        ephemFile: str,
-        targetName: str,
+        ephem_file: str,
+        target_name: str,
         trackId: int,
-        dRA: float = 0.0,
-        dDec: float = 0.0,
         rot_sky: float = 0.0,
         slew_timeout: float = 1200.0,
     ) -> None:
@@ -875,22 +873,15 @@ async def slew_ephem_target(
 
         Parameters
         ----------
-        ephemFile : str
+        ephem_file : str
             Name of the file containing ephemeris data.
-        targetName : str
+        target_name : str
             Target name.
-        dRA : float, optional
-            Differential Track Rate in RA (arcsec/s), default is 0.0.
-        dDec : float, optional
-            Differential Track Rate in Dec (arcsec/s), default is 0.0.
         trackId : int
             Target identifier.
         rot_sky : `float`
             Desired instrument position angle (degree), Eastwards from North.
             Default is 0.0.
-        validateOnly : bool, optional
-            If True, validate the target without changing the current
-            demand, default is False.
         slew_timeout : float, optional
             Timeout for the slew command in seconds, default is 1200
             seconds (20 minutes).
@@ -902,10 +893,10 @@ async def slew_ephem_target(
         # First, validate the parameters by issuing the command
         # with validateOnly=True
         await ptg.cmd_ephemTarget.set_start(
-            ephemFile=ephemFile,
-            targetName=targetName,
-            dRA=dRA,
-            dDec=dDec,
+            ephemFile=ephem_file,
+            targetName=target_name,
+            dRA=0.0,
+            dDec=0.0,
             trackId=trackId,
             rotPA=Angle(rot_sky, unit=u.deg).deg,
             validateOnly=True,
@@ -919,21 +910,21 @@ async def slew_ephem_target(
 
         if not validated_target.isValid:
             raise RuntimeError(
-                f"Validation failed for target {targetName}: Target is not "
+                f"Validation failed for target {target_name}: Target is not "
                 f"observable."
             )
         else:
             self.log.info(
-                f"Validation successful for target {targetName}. "
+                f"Validation successful for target {target_name}. "
                 f"Az: {validated_target.az}, El: {validated_target.el}, "
                 f"Rot: {validated_target.rot}"
             )
 
             await ptg.cmd_ephemTarget.set_start(
-                ephemFile=ephemFile,
-                targetName=targetName,
-                dRA=dRA,
-                dDec=dDec,
+                ephemFile=ephem_file,
+                targetName=target_name,
+                dRA=0.0,
+                dDec=0.0,
                 trackId=trackId,
                 rotPA=Angle(rot_sky, unit=u.deg).deg,
                 validateOnly=False,  # Now set validateOnly to False
@@ -942,7 +933,7 @@ async def slew_ephem_target(
 
             await self._slew_to(ptg.cmd_ephemTarget, slew_timeout=slew_timeout)
             self.log.info(
-                f"Telescope slewed to target {targetName} using ephemeris data."
+                f"Telescope slewed to target {target_name} using ephemeris data."
             )
 
     async def offset_radec(self, ra: float, dec: float) -> None: