diff --git a/src/common/generate_urls_from_times.py b/src/common/generate_urls_from_times.py
index 4448098..6fa40ff 100644
--- a/src/common/generate_urls_from_times.py
+++ b/src/common/generate_urls_from_times.py
@@ -13,6 +13,12 @@
 # then aggregate and check duplicates 
 #
 
+"""
+    Time series extraction
+
+    Authors: Jeffrey L. Tilson
+"""
+
 import os,sys
 import numpy as np
 import pandas as pd
diff --git a/src/common/geopoints_url.py b/src/common/geopoints_url.py
index a96d96a..afb26e4 100644
--- a/src/common/geopoints_url.py
+++ b/src/common/geopoints_url.py
@@ -10,7 +10,11 @@
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 '''
 
-## Codes substantially derived from the utilities.py code written by Brian O. Blanton, RENCI
+"""
+    Time series extraction
+
+    Authors: Jeffrey L. Tilson, Brian O. Blanton 8/2024
+"""
 
 #!/usr/bin/env python
 # coding: utf-8
diff --git a/src/common/utilities.py b/src/common/utilities.py
index adb8b64..3c3a88b 100644
--- a/src/common/utilities.py
+++ b/src/common/utilities.py
@@ -10,6 +10,12 @@
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 '''
 
+"""
+    Time series extraction
+
+    Authors: Jeffrey L. Tilson, Brian O. Blanton 8/2024
+"""
+
 import sys 
 import numpy as np
 import pandas as pd