Still attempting to fix the documentation

.readthedocs.yml

@@ -1,14 +1,29 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
 version: 2
 
+# Set the version of Python and other tools you might need
 build:
-  image: latest
+  os: ubuntu-20.04
+  tools:
+    python: "3.9"
+    # You can also specify other tool versions:
+    # nodejs: "16"
+    # rust: "1.55"
+    # golang: "1.17"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+   configuration: doc/conf.py
+
+# If using Sphinx, optionally build your docs in additional formats such as PDF
+# formats:
+#    - pdf
 
+# Optionally declare the Python requirements required to build your docs
 python:
-  version: 3.8
-  install:
-    - method: pip
-      path: .
-      extra_requirements:
-        - docs
-        - xarray
-        - astropy
+   install:
+   - requirements: doc/requirements.txt

doc/conf.py

@@ -166,4 +166,4 @@
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {'https://docs.python.org/3': None}
-autodoc_mock_imports = ['xarray', 'astropy']
+#autodoc_mock_imports = ['xarray', 'astropy']

doc/requirements.txt

@@ -0,0 +1,2 @@
+xarray
+astropy