diff --git a/python_src/lasp/lasp_measurementset.py b/python_src/lasp/lasp_measurementset.py
index 6973868..98904c2 100644
--- a/python_src/lasp/lasp_measurementset.py
+++ b/python_src/lasp/lasp_measurementset.py
@@ -14,17 +14,16 @@ class MeasurementSet(list):
     """
     Group of measurements that have some correspondence to one another. Class
     is used to operate on multiple measurements at once.
-
     """
 
     def __init__(self, mlist: List[Measurement] = []):
         """
         Initialize a measurement set
 
-        Args:
+        Arg:
             mlist: Measurement list
-
         """
+
         if any([not isinstance(i, Measurement) for i in mlist]):
             raise TypeError("Object in list should be of Measurement type")
 
@@ -33,11 +32,17 @@ class MeasurementSet(list):
         super().__init__(mlist)
 
     def getNewestReferenceMeasurement(self, mtype: MeasurementType):
-        """Return the newest (in time) measurement in the current list of a certain type. Returns None in case no measurement could be found.
-
-        Args:
-            mtype (MeasurementType): The type required.
         """
+        Get the NEWEST ref. measurement of a current type, in the current set.
+
+        Arg:
+            mtype (MeasurementType): The type required.
+
+        Return:
+            - The newest (in time) measurement in the current list of a certain type.
+            - None, in case no measurement could be found.
+        """
+
         mnewest = None
         for m in self:
             if m.measurementType() == mtype:
@@ -49,19 +54,26 @@ class MeasurementSet(list):
         return mnewest
 
     def getReferenceMeasurements(self, mtype: MeasurementType):
-        """Get all available reference measurements of a certain type in the
-        current set.
+        """Get ALL ref. measurements of a certain type, in the current set.
 
-        Args:
+        Arg:
             mtype (MeasurementType): The type of which to list
 
-        Returns:
-            a new measurement set including all measurements of a certain type
+        Return:
+            A new measurement set, including all measurements of a certain type
         """
+
         return [m for m in self if m.measurementType() == mtype]
 
     def getNewestReferenceMeasurements(self):
-        """Returns a dictionary with newest measurement of each type that is not specific returns None in case no measurement is found."""
+        """
+        Get the NEWEST ref. measurement of all types, in the current set.
+
+        Return:
+            - A dictionary with the newest measurement of each type that is not specific
+            - None, in case no measurement is found.
+        """
+
         newest = {}
         for m in self:
             mtype = m.measurementType()
@@ -75,8 +87,17 @@ class MeasurementSet(list):
         return newest
 
     def newestReferenceOlderThan(self, secs):
-        """Returns a dictionary of references with the newest reference, that is still
-        older than `secs` seconds."""
+        """
+        Get a dictionary of reference measurements which are older than a
+        specified threshold. Only one of each type is returned.
+
+        Args:
+            - secs: time threshold, in seconds
+
+        Return:
+            - a dictionary of references with the newest reference, that is still
+            older than `secs` seconds
+        """
         curtime = time.time()
         newest = self.getNewestReferenceMeasurements()
         newest_older_than = {}
@@ -87,25 +108,29 @@ class MeasurementSet(list):
 
     def measTimeSame(self):
         """
-        Returns True if all measurements have the same measurement
-        time (recorded time)
-
+        Returns True if all measurements have the same measurement length and
+        sample rate
         """
+
         if len(self) > 0:
-            first = self[0].N
-            return all([first == meas.N for meas in self])
+            firstN = self[0].N              # samples
+            firstFS = self[0].samplerate    # sample rate
+            sameN = all([firstN == meas.N for meas in self])
+            sameFS = all([firstFS == meas.samplerate for meas in self])
+            return sameN and sameFS
         else:
             return False
 
     def measSimilar(self):
         """
         Similar means: channel metadata is the same, and the measurement time
-        is the same. It means that the recorded data is, of course, different.
+        is the same.
 
         Returns:
-            True if measChannelsSame() and measTimeSame() else False
-
+            - True if measChannelsSame() and measTimeSame()
+            - False otherwise
         """
+
         return self.measTimeSame() and self.measChannelsSame()
 
     def measChannelsSame(self):
@@ -115,6 +140,7 @@ class MeasurementSet(list):
         a set of measurements, simultaneously. If the channel data is the same
         (name, sensitivity, ...) it returns True.
         """
+
         if len(self) > 0:
             first = self[0].channelConfig
             return all([first == meas.channelConfig for meas in self])