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I-ALiRT CoDICE-Hi - update to include spin angle #3126

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I-ALiRT CoDICE-Hi - update to include spin angle #3126

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e81620f
update to use spin angle dimension
laspsandoval May 4, 2026
41e273b
spin angle
laspsandoval Jun 12, 2026
d01c672
reorder metadata
laspsandoval Jun 12, 2026
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14 changes: 14 additions & 0 deletions imap_processing/cdf/config/imap_ialirt_l1_variable_attrs.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -240,6 +240,20 @@ codice_hi_spin_sector:
VAR_TYPE: support_data
dtype: int32

codice_hi_spin_angle:
CATDESC: CoDICE-Hi spin angle for each spin sector and polar angle pair
DEPEND_1: codice_hi_spin_sector
DEPEND_2: codice_hi_polar
FIELDNAM: CoDICE-Hi spin angle
FILLVAL: -1.0e31
FORMAT: F12.6
SCALETYP: linear
UNITS: degrees
VALIDMAX: 360.0
VALIDMIN: 0.0
VAR_TYPE: support_data
dtype: float32

codice_hi_spin_sector_labels:
CATDESC: CoDICE-Hi spin sector labels
FIELDNAM: CoDICE-Hi spin sector labels
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11 changes: 11 additions & 0 deletions imap_processing/ialirt/utils/create_xarray.py
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Expand Up @@ -12,6 +12,7 @@
HI_IALIRT_ELEVATION_ANGLE,
)
from imap_processing.ialirt.utils.constants import (
HI_IALIRT_SPIN_ANGLE,
IALIRT_DIMS,
IALIRT_DTYPES,
codice_hi_energy_center,
Expand Down Expand Up @@ -232,6 +233,15 @@ def create_xarray_from_records(records: list[dict]) -> xr.Dataset: # noqa: PLR0
),
)

spin_angle = xr.DataArray(
data=HI_IALIRT_SPIN_ANGLE.T.astype(np.float32),
name="codice_hi_spin_angle",
dims=["codice_hi_spin_sector", "codice_hi_polar"],
attrs=cdf_manager.get_variable_attributes(
"codice_hi_spin_angle", check_schema=False
),
)

spin_sector_labels = xr.DataArray(
[
"0",
Expand Down Expand Up @@ -267,6 +277,7 @@ def create_xarray_from_records(records: list[dict]) -> xr.Dataset: # noqa: PLR0
"codice_hi_polar": polar,
"codice_hi_polar_labels": polar_labels,
"codice_hi_spin_sector": spin_sector,
"codice_hi_spin_angle": spin_angle,
"codice_hi_spin_sector_labels": spin_sector_labels,
"swe_electron_energy": swe_electron_energy,
}
Expand Down
11 changes: 10 additions & 1 deletion imap_processing/tests/ialirt/unit/test_create_xarray.py
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Expand Up @@ -6,7 +6,7 @@
import numpy.testing as npt

from imap_processing.cdf.utils import write_cdf
from imap_processing.ialirt.utils.constants import swe_energy
from imap_processing.ialirt.utils.constants import HI_IALIRT_SPIN_ANGLE, swe_energy
from imap_processing.ialirt.utils.create_xarray import create_xarray_from_records


Expand Down Expand Up @@ -166,3 +166,12 @@ def test_create_dataset():
)

assert test_data_path.exists()

# codice_hi_spin_angle should be a 2D array of actual spin angles (degrees).
# Shape: (spin_sector=4, polar=4).
spin_angle = dataset["codice_hi_spin_angle"]
assert spin_angle.dims == ("codice_hi_spin_sector", "codice_hi_polar")
assert spin_angle.shape == (4, 4)
npt.assert_allclose(
spin_angle.values, HI_IALIRT_SPIN_ANGLE.T.astype(np.float32), rtol=1e-6
)
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