From cfc15ad82288bc7010196d413af05f26a176fc74 Mon Sep 17 00:00:00 2001
From: augustinm <augustinm@met.no>
Date: Fri, 20 Sep 2024 11:56:49 +0200
Subject: [PATCH] write time as days

---
 aprofiles/io/write_profiles.py | 12 ++++++------
 docs/changelog.rst             |  6 ++++++
 pyproject.toml                 |  2 +-
 3 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/aprofiles/io/write_profiles.py b/aprofiles/io/write_profiles.py
index 309780b..d214688 100644
--- a/aprofiles/io/write_profiles.py
+++ b/aprofiles/io/write_profiles.py
@@ -19,11 +19,11 @@ def write(profiles, base_dir, verbose):
         - verbose (bool): Verbose mode. Defaults to False.
     """
     
-    def _convert_time_after_epoch(ds, resolution='ms'):
-        time_attrs = ds["time"].attrs
-        ds = ds.assign_coords(time=ds.time.data.astype(f"datetime64[{resolution}]").astype(int))
-        ds["time"] = ds["time"].assign_attrs(time_attrs)
-        ds["time"].attrs['units'] = 'milliseconds since 1970-01-01T00:00:00'
+    def _convert_time_after_epoch(ds):
+        ds = ds.assign_coords(time=ds.time.data.astype(f"datetime64[ms]").astype(f'float32'))
+        # milliseconds to days
+        ds['time'] = ds['time'] / (1000 * 60 * 60 * 24) 
+        ds["time"].attrs['units'] = 'days since 1970-01-01T00:00:00'
         return ds
     
     def _classify_scene(ds):
@@ -131,7 +131,7 @@ def _classify_retrieval_scene(ds):
         ds_towrite = ds_towrite.drop(nodim_var)
 
     # converts time
-    ds_towrite = _convert_time_after_epoch(ds_towrite, resolution='ms')
+    ds_towrite = _convert_time_after_epoch(ds_towrite)
     
     # add altitude direction
     ds_towrite["altitude"] = ds_towrite["altitude"].assign_attrs({
diff --git a/docs/changelog.rst b/docs/changelog.rst
index d153f5f..cb8b1fe 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -4,6 +4,12 @@ Changelog
 .. image:: _static/images/history-solid.svg
    :class: awesome-svg
 
+0.6.5
+^^^^^^^
+Sep 20, 2024
+
+- Work on CF compliance (write time as days).
+
 0.6.4
 ^^^^^^^
 Sep 16, 2024
diff --git a/pyproject.toml b/pyproject.toml
index 5e9f2ab..252e0ce 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "aprofiles"
-version = "0.6.4"
+version = "0.6.5"
 description = "Analysis of atmospheric profilers measurements"
 authors = ["augustinm <augustinm@met.no>"]
 license = "GPL-3.0"