diff --git a/changelog/169.bugfix.rst b/changelog/169.bugfix.rst
new file mode 100644
index 00000000..e69de29b
diff --git a/docs/conf.py b/docs/conf.py
index 44427a11..7caefbdc 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -2,7 +2,7 @@
 #
 # This file does only contain a selection of the most common options. For a
 # full list see the documentation:
-# http://www.sphinx-doc.org/en/master/config
+# https://www.sphinx-doc.org/en/master/config
 
 # flake8: NOQA: E402
 
@@ -20,7 +20,7 @@
     os.environ["HOME"] = "/home/docs/"
     os.environ["LANG"] = "C"
     os.environ["LC_ALL"] = "C"
-    os.environ["HIDE_PARFIVE_PROGESS"] = "True"
+    os.environ["HIDE_PARFIVE_PROGRESS"] = "True"
 
 
 # -- Project information -----------------------------------------------------
diff --git a/radiospectra/spectrogram/sources/callisto.py b/radiospectra/spectrogram/sources/callisto.py
index 1baef81b..d8cf028b 100644
--- a/radiospectra/spectrogram/sources/callisto.py
+++ b/radiospectra/spectrogram/sources/callisto.py
@@ -31,8 +31,8 @@ def __init__(self, data, meta, **kwargs):
 
     @property
     def observatory_location(self):
-        lat = self.meta["fits_meta"]["OBS_LAT"] * u.deg * 1.0 if self.meta["fits_meta"]["OBS_LAC"] == "N" else -1.0
-        lon = self.meta["fits_meta"]["OBS_LON"] * u.deg * 1.0 if self.meta["fits_meta"]["OBS_LOC"] == "E" else -1.0
+        lat = self.meta["fits_meta"]["OBS_LAT"] * u.deg * (1.0 if self.meta["fits_meta"]["OBS_LAC"] == "N" else -1.0)
+        lon = self.meta["fits_meta"]["OBS_LON"] * u.deg * (1.0 if self.meta["fits_meta"]["OBS_LOC"] == "E" else -1.0)
         height = self.meta["fits_meta"]["OBS_ALT"] * u.m
         return EarthLocation(lat=lat, lon=lon, height=height)
 
diff --git a/radiospectra/spectrogram/spectrogrambase.py b/radiospectra/spectrogram/spectrogrambase.py
index f1cb2b3f..fd3f4395 100644
--- a/radiospectra/spectrogram/spectrogrambase.py
+++ b/radiospectra/spectrogram/spectrogrambase.py
@@ -11,9 +11,9 @@ class GenericSpectrogram(PcolormeshPlotMixin, NonUniformImagePlotMixin):
     Attributes
     ----------
     meta : `dict-like`
-        Meta data for the spectrogram.
+        Metadata for the spectrogram.
     data : `numpy.ndarray`
-        The spectrogram data itself a 2D array.
+        The spectrogram data itself is a 2D array.
     """
 
     _registry = {}
@@ -91,7 +91,7 @@ def _validate_meta(self):
         This method includes very basic validation checks which apply to
         all of the kinds of files that radiospectra can read.
         Datasource-specific validation should be handled in the relevant
-        file in the radiospectra.spectrogram.sources.
+        file in radiospectra.spectrogram.sources.
         """
         msg = "Spectrogram coordinate units for {} axis not present in metadata."
         err_message = []