diff --git a/ATR/isotope-analyzer-CRDS.yaml b/ATR/isotope-analyzer-CRDS.yaml
new file mode 100644
index 0000000..0ecd5c4
--- /dev/null
+++ b/ATR/isotope-analyzer-CRDS.yaml
@@ -0,0 +1,17 @@
+plugins:
+  source:
+    - module: intake_xarray
+
+sources:
+  ATR-0125:
+    description: Calibrated stable water vapour isotope measurements on board the ATR-42 during research flight 02
+    driver: opendap
+    args:
+      urlpath: https://observations.ipsl.fr/thredds/dodsC/EUREC4A/AIRCRAFT/ATR/vapour/EUREC4A_ATR_PICARRO_L3.0_20200125_as200002.nc
+      auth: null
+      chunks: null
+      engine: netcdf4
+    metadata:
+      maintainer: Franziska Aemisegger <franziska.aemisegger[at]env.ethz.ch>, Leonie Villiger <leonie.villiger[at]env.ethz.ch>
+      doi: https://doi.org/10.25326/244
+      note: https://observations.ipsl.fr/aeris/eurec4a-data/AIRCRAFT/ATR/vapour/ATR_RF02_20200125_info_Picarro.yaml
\ No newline at end of file
diff --git a/ATR/isotope-analyzer-wv.yaml b/ATR/isotope-analyzer-wv.yaml
new file mode 100644
index 0000000..74d7725
--- /dev/null
+++ b/ATR/isotope-analyzer-wv.yaml
@@ -0,0 +1,13 @@
+plugins:
+  source:
+    - module: intake_xarray
+
+sources:
+  CRDS:
+    args:
+      path: "{{CATALOG_DIR}}/isotope-analyzer-wv.yaml"
+      description: 'Calibrated stable water vapor isotope measurements on board the ATR-42'
+    driver: yaml_file_cat
+    metadata:
+      maintainer: Franziska Aemisegger <franziska.aemisegger[at]env.ethz.ch>, Leonie Villiger <leonie.villiger[at]env.ethz.ch>
+      doi: https://doi.org/10.25326/244
\ No newline at end of file
diff --git a/ATR/isotope-analyzer.yaml b/ATR/isotope-analyzer.yaml
new file mode 100644
index 0000000..84ab725
--- /dev/null
+++ b/ATR/isotope-analyzer.yaml
@@ -0,0 +1,11 @@
+plugins:
+  source:
+    - module: intake_xarray
+
+sources:
+  water_vapor:
+    args:
+      path: "{{CATALOG_DIR}}/isotope-analyzer-wv.yaml"
+    description: 'Water vapor isotope measurements on board the ATR-42'
+    driver: yaml_file_cat
+    metadata: {}
\ No newline at end of file
diff --git a/ATR/isotopes.yaml b/ATR/isotopes.yaml
deleted file mode 100644
index a9c9609..0000000
--- a/ATR/isotopes.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-plugins:
-  source:
-    - module: intake_xarray
-
-sources:
-  isotopes:
-    description: Calibrated stable water vapour isotope measurements on board the ATR-42 during research flight 02
-    driver: netcdf
-    args:
-      urlpath: simplecache::https://observations.ipsl.fr/aeris/eurec4a-data/AIRCRAFT/ATR/vapour/EUREC4A_ATR_PICARRO_L3.0_20200125_as200002.nc
-      chunks: null
-    metadata:
-      maintainer: Franziska Aemisegger <franziska.aemisegger[at]env.ethz.ch>, Leonie Villiger <leonie.villiger[at]env.ethz.ch>
-      doi: https://doi.org/10.25326/244
-
-  isotopes_metadata:
-    description: Important information for the usage of the calibrated stable water vapour isotope measurements on board the ATR-42 during research flight 02
-    driver: yaml
-    args:
-      urlpath: simplecache::https://observations.ipsl.fr/aeris/eurec4a-data/AIRCRAFT/ATR/vapour/ATR_RF02_20200125_info_Picarro.yaml
-      chunks: null
-    metadata:
-      maintainer: Franziska Aemisegger <franziska.aemisegger[at]env.ethz.ch>, Leonie Villiger <leonie.villiger[at]env.ethz.ch>
-      doi: https://doi.org/10.25326/244
\ No newline at end of file
diff --git a/ATR/main.yaml b/ATR/main.yaml
index cae5f80..17f7493 100644
--- a/ATR/main.yaml
+++ b/ATR/main.yaml
@@ -14,3 +14,9 @@ sources:
     metadata:
       tags:
         - track
+  isotope_analyzer:
+    args:
+      path: "{{CATALOG_DIR}}/isotope-analyzer.yaml"
+    description: 'Isotope measurements on board the ATR-42'
+    driver: yaml_file_cat
+    metadata: {}
\ No newline at end of file