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Add MTG Highres config #48

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Add MTG Highres config #48

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1dc3119
Add MTG Highres config
jacobbieker Aug 12, 2025
09f754f
Remove _FillValue to write MTG correctly
jacobbieker Aug 15, 2025
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24 changes: 23 additions & 1 deletion src/satellite_consumer/config.py
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Original file line number Diff line number Diff line change
Expand Up @@ -549,7 +549,7 @@ class SatelliteMetadata:
(
"Rectified (level 1c) Meteosat-12 image data for Europe and Africa. ",
"The data is transmitted as High Rate transmissions in 16 spectral channels ",
"(12 low and 4 high resolution). ",
"(12 low and 4 high resolution). This is the low resolution subset.",
"See https://user.eumetsat.int/catalogue/EO:EUM:DAT:0662",
),
),
Expand All @@ -560,5 +560,27 @@ class SatelliteMetadata:
# Matches the files that cover only the top of the disk (UK)
file_filter_regex=r"\S+BODY\S+00(?:[3][2-9]|40).nc$",
),
"odegree-12-highres": SatelliteMetadata(
region="europe, africa",
cadence_mins=10,
longitude=0.0,
height=35786400,
product_id="EO:EUM:DAT:0665",
channels=MTG_1KM_CHANNELS,
description="".join(
(
"Rectified (level 1c) Meteosat-12 image data for Europe and Africa. ",
"The data is transmitted as High Rate transmissions in 16 spectral channels ",
"(12 low and 4 high resolution). This is the high resolution subset.",
"See https://user.eumetsat.int/catalogue/EO:EUM:DAT:0665",
),
),
spatial_coordinates={
"x_geostationary": list(np.linspace(-5567499.9985508835, 5567499.998550878, 22272)),
"y_geostationary": list(np.linspace(-5567499.998550887, 5567499.998550878, 22272)),
},
# Matches the files that cover only the top of the disk (UK)
file_filter_regex=r"\S+BODY\S+00(?:[3][2-9]|40).nc$",
),
}
"""Metadata for the available satellite data sets."""
2 changes: 1 addition & 1 deletion src/satellite_consumer/process.py
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Expand Up @@ -152,7 +152,7 @@ def _serialize(d: dict[str, Any]) -> dict[str, Any]:
if "time" not in da.dims:
time = pd.to_datetime(rounded_time)
da = da.assign_coords({"time": time}).expand_dims("time")

da.attrs.pop("_FillValue", None)
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@peterdudfield peterdudfield Aug 15, 2025

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im not sure this is right? I saw some errors like this with the upgrade from zarr2 to zarr3. What error do you get if you dont include this?

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@jacobbieker jacobbieker Aug 15, 2025

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If this isn't here, it gives an error of

16:58:40.876 ERROR   [main.py:119] | Error: failed to prevent overwriting existing key _FillValue in attrs. This is probably an encoding field used by xarray to describe how a variable is serialized. To proceed, remove this key from the variable's attributes manually.

Removing the FillValue here fixes that and allows for the dataarrays to be added to the Icechunk store successfully

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@peterdudfield peterdudfield Aug 17, 2025

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a funny, does that happen for you on the other satellites?

What python version you running? What zarr, xarray and icechunk version you running?

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@jacobbieker jacobbieker Aug 18, 2025

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Its with Zarr 3.1.1, Xarray 2025.7.1, icechunk 1.1.1

It doesn't with the other ones, but the MTG format is quite a bit different than the MSG ones. In #44, this also does show up for other geostationary satellites as well.

# Increase clarity of coordinates, including coordinate dimension names and attributes
da = da.rename({"x": "x_geostationary", "y": "y_geostationary"})
for name in ["x_geostationary", "y_geostationary"]:
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