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I-ALiRT - fix time conversion #2701

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Merged
laspsandoval merged 2 commits into from
Feb 18, 2026
Merged

I-ALiRT - fix time conversion #2701

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ab0fcfd
fix datetime conversion
Feb 13, 2026
4dc4f9c
hit quickfix
Feb 18, 2026
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9 changes: 5 additions & 4 deletions imap_processing/ialirt/l0/process_hit.py
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Original file line number Diff line number Diff line change
Expand Up @@ -168,15 +168,16 @@ def process_hit(xarray_data: xr.Dataset) -> list[dict]:
incomplete_groups.append(group)
continue

hit_met = grouped_data["hit_met"][(grouped_data["group"] == group).values]
mid_measurement = int((hit_met[0] + hit_met[-1]) // 2)
hit_met = int(
grouped_data["hit_met"][(grouped_data["group"] == group).values].values[0]
)

status_values = grouped_data["hit_status"][
(grouped_data["group"] == group).values
]

if np.any(status_values == 0):
logger.info(f"Off-nominal value detected at {met_to_utc(mid_measurement)}")
logger.info(f"Off-nominal value detected at {met_to_utc(hit_met)}")
continue

fast_rate_1 = grouped_data["hit_fast_rate_1"][
Expand All @@ -196,7 +197,7 @@ def process_hit(xarray_data: xr.Dataset) -> list[dict]:
_populate_instrument_header_items(met)
| {
"instrument": "hit",
"hit_epoch": int(met_to_ttj2000ns(mid_measurement)),
"hit_epoch": int(met_to_ttj2000ns(hit_met)),
"hit_e_a_side_low_en": Decimal(
f"{l1['IALRT_RATE_1'] + l1['IALRT_RATE_2']:.3f}"
),
Expand Down
40 changes: 34 additions & 6 deletions imap_processing/ialirt/utils/create_xarray.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@

import numpy as np
import xarray as xr
from cdflib.epochs import CDFepoch

from imap_processing.cdf.imap_cdf_manager import ImapCdfAttributes
from imap_processing.codice.constants import (
Expand All @@ -19,7 +20,6 @@
hit_restricted_fields,
swe_energy,
)
from imap_processing.spice.time import et_to_ttj2000ns, str_to_et


def create_xarray_from_records(records: list[dict]) -> xr.Dataset: # noqa: PLR0912
Expand Down Expand Up @@ -53,11 +53,39 @@ def create_xarray_from_records(records: list[dict]) -> xr.Dataset: # noqa: PLR0
dt = datetime.fromisoformat(date)

# Start and end of that UTC day
start_str = dt.date().isoformat() + "T00:00:00Z"
end_str = (dt.date() + timedelta(days=1)).isoformat() + "T00:00:00Z"

start_ttj2000 = et_to_ttj2000ns(str_to_et(start_str))
end_ttj2000 = et_to_ttj2000ns(str_to_et(end_str))
start_dt = dt.replace(hour=0, minute=0, second=0, microsecond=0)
end_dt = start_dt + timedelta(days=1)

start_ttj2000 = int(
CDFepoch.compute_tt2000(
[
start_dt.year,
start_dt.month,
start_dt.day,
start_dt.hour,
start_dt.minute,
start_dt.second,
0,
0,
0, # ms, us, ns
]
)
)
end_ttj2000 = int(
CDFepoch.compute_tt2000(
[
end_dt.year,
end_dt.month,
end_dt.day,
end_dt.hour,
end_dt.minute,
end_dt.second,
0,
0,
0, # ms, us, ns
]
)
)

for record in records:
inst = record.get("instrument")
Expand Down