Estimate Gaussian width from normalized derivate

docs/environment_docs.yml

@@ -7,6 +7,7 @@ dependencies:
   - xarray
   - sphinx
   - pydata-sphinx-theme
+  - arm-test-data
   - pip:
       - sphinx_gallery
       - sphinx-copybutton

pysp2/testing/sample_files.py

@@ -2,11 +2,28 @@
 These are the sample files used for testing PySP2.
 """
 import os
+from pathlib import Path
+from arm_test_data import DATASETS
 
-DATA_PATH = os.path.join(os.path.dirname(__file__), 'data')
-EXAMPLE_SP2B = os.path.join(
-    DATA_PATH, 'mosaossp2M1.00.20191216.130601.raw.20191216x193.sp2b')
-EXAMPLE_INI = os.path.join(
-    DATA_PATH, 'mosaossp2M1.00.20191216.000601.raw.20191216000000.ini')
-EXAMPLE_HK = os.path.join(
-    DATA_PATH, 'mosaossp2auxM1.00.20191217.010801.raw.20191216000000.hk')
+DATA_PATH = Path(__file__).resolve().parent / "data"
+
+
+def _sample_file(local_name: str) -> str:
+    local_path = DATA_PATH / local_name
+    if local_path.exists():
+        return str(local_path)
+    return DATASETS.fetch(local_name)
+
+#DATA_PATH = os.path.join(os.path.dirname(__file__), 'data')
+EXAMPLE_SP2B = _sample_file(
+    'mosaossp2M1.00.20191216.130601.raw.20191216x193.sp2b')
+EXAMPLE_INI = _sample_file(
+    'mosaossp2M1.00.20191216.000601.raw.20191216000000.ini')
+EXAMPLE_HK = _sample_file(
+    'mosaossp2auxM1.00.20191217.010801.raw.20191216000000.hk')
+
+print("Fetching files from ARM test data repository...")
+print("DATASETS:", DATASETS.registry_files)
+EXAMPLE_SP2B_PSL = _sample_file("20230721x002.sp2b")
+EXAMPLE_INI_PSL = _sample_file("20230721121710.ini")
+EXAMPLE_HK_PSL = _sample_file("20230721121711.hk")