Added a few metrics for measuring performance

spatz/sensors/gps/erinome1.py

@@ -14,4 +14,6 @@ class Erinome_I(GPS):
     def _sensor_specific_effects(self, x: ArrayLike) -> ArrayLike:
         # TODO: What's the GPS module's behavior?
 
+        # TODO: Only return measurements every second
+
         return x

spatz/sensors/gps/gps.py

@@ -16,7 +16,7 @@ class GPS(Sensor):
         """GPS Module which provides the following information:
         - Longitude (in °)
         - Latitiude (in °)
-        - Altitude (in °)
+        - Altitude (in m)
         """
         super().__init__(dataset, logger, transforms)