some basic setu

pyaerocom/plugins/mep/reader.py

@@ -10,7 +10,7 @@
 import xarray as xr
 
 from pyaerocom import const
-from pyaerocom.io.readungriddedbase import ReadUngriddedBase
+from pyaerocom.io.readgridded import ReadGridded
 from pyaerocom.stationdata import StationData
 from pyaerocom.ungriddeddata import UngriddedData
 

pyaerocom/plugins/tropomi/reader.py

@@ -0,0 +1,48 @@
+from __future__ import annotations
+
+import logging
+import re
+from collections import defaultdict
+from collections.abc import Iterable
+from functools import cached_property, lru_cache
+from pathlib import Path
+
+import xarray as xr
+
+from pyaerocom import const
+from pyaerocom.io.readgridded import ReadGriddedBase
+from pyaerocom.stationdata import StationData
+from pyaerocom.griddeddata import GriddedData
+
+logger = logging.getLogger(__name__)
+
+COLUMNS = (
+    "country",
+    "stationname",
+    "stationcode",
+    "latitude",
+    "longitude",
+    "altitude",
+    "timestamp",
+    "pollutant",
+    "unit",
+    "frequency",
+    "value",
+)
+
+
+class ReadTropomiL3(ReadGriddedData):
+    """
+    Class to read processed TROPOMI data (homebrewed L3 data) for use in SESAM.
+    e.g., Tropospheric vertical column of nitrogen dioxide
+    """
+
+    _FILEMASK = "S5p_*.nc"
+    __version__ = "0.01"
+
+    DATA_ID = ""
+
+    def __init__(self, data_id=None, data_dir=None):
+        if data_dir is None:
+            raise Exception("Need a data_dir")
+        super.__init__(data)