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import pathlib
import pytest
import xarray as xr
from xarray_sentinel import esa_safe
DATA_FOLDER = pathlib.Path(__file__).parent / "data"
COMMON_ATTRIBUTES = {
"family_name": "SENTINEL-1",
"number": "B",
"mode": "IW",
"swaths": ["IW1", "IW2", "IW3"],
"orbit_number": 26269,
"relative_orbit_number": 168,
"pass": "DESCENDING",
"ascending_node_time": "2021-04-01T04:49:55.637823",
"transmitter_receiver_polarisations": ["VV", "VH"],
"product_type": "SLC",
}
SENTINEL1_SLC_PRODUCTS = [
(
DATA_FOLDER
/ "S1B_IW_SLC__1SDV_20210401T052622_20210401T052650_026269_032297_EFA4.SAFE",
"IW1/VV",
),
(
DATA_FOLDER
/ "S1A_EW_SLC__1SDH_20210403T122536_20210403T122630_037286_046484_8152.SAFE",
"EW1/HH",
),
(
DATA_FOLDER
/ "S1A_S3_SLC__1SDV_20210401T152855_20210401T152914_037258_04638E_6001.SAFE",
"S3/VH",
),
]
SENTINEL1_GRD_PRODUCTS = [
(
DATA_FOLDER
/ "S1B_IW_GRDH_1SDV_20210401T052623_20210401T052648_026269_032297_ECC8.SAFE",
"IW/VV",
),
]
SENTINEL1_PRODUCTS = SENTINEL1_SLC_PRODUCTS + SENTINEL1_GRD_PRODUCTS
def test_open_dataset_root() -> None:
product_path = (
DATA_FOLDER
/ "S1B_IW_SLC__1SDV_20210401T052622_20210401T052650_026269_032297_EFA4.SAFE"
)
res = xr.open_dataset(product_path, engine="sentinel-1")
assert isinstance(res, xr.Dataset)
for attr_name in COMMON_ATTRIBUTES:
assert attr_name in res.attrs
assert res.attrs[attr_name] == COMMON_ATTRIBUTES[attr_name]
res = xr.open_dataset(product_path)
assert isinstance(res, xr.Dataset)
product_path = product_path / "manifest.safe"
res = xr.open_dataset(product_path, engine="sentinel-1")
assert isinstance(res, xr.Dataset)
res = xr.open_dataset(product_path)
assert isinstance(res, xr.Dataset)
with pytest.raises(ValueError):
xr.open_dataset("")
@pytest.mark.parametrize("product_path,swath_pol", SENTINEL1_SLC_PRODUCTS)
def test_open_dataset_polarisation_slc(
product_path: esa_safe.PathType,
swath_pol: str,
) -> None:
res = xr.open_dataset(product_path, engine="sentinel-1", group=swath_pol)
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"line", "pixel"} or set(res.dims) == {
"azimuth_time",
"slant_range_time",
}
assert set(res.coords) == {"azimuth_time", "slant_range_time", "line", "pixel"}
@pytest.mark.parametrize("product_path,swath_pol", SENTINEL1_GRD_PRODUCTS)
def test_open_dataset_polarisation_grd(
product_path: esa_safe.PathType,
swath_pol: str,
) -> None:
res = xr.open_dataset(product_path, engine="sentinel-1", group=swath_pol)
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"line", "pixel"} or set(res.dims) == {
"azimuth_time",
"ground_range",
}
assert set(res.coords) == {"azimuth_time", "ground_range", "line", "pixel"}
@pytest.mark.parametrize("product_path,swath_pol", SENTINEL1_PRODUCTS)
def test_open_dataset_orbit(
product_path: esa_safe.PathType,
swath_pol: str,
) -> None:
res = xr.open_dataset(product_path, engine="sentinel-1", group=f"{swath_pol}/orbit")
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"axis", "azimuth_time"}
assert set(res.variables) == {"azimuth_time", "axis", "velocity", "position"}
@pytest.mark.parametrize("product_path,swath_pol", SENTINEL1_PRODUCTS)
def test_open_dataset_attitude(
product_path: esa_safe.PathType,
swath_pol: str,
) -> None:
res = xr.open_dataset(
product_path, engine="sentinel-1", group=f"{swath_pol}/attitude"
)
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"azimuth_time"}
expected = {
"azimuth_time",
"roll",
"pitch",
"yaw",
"q0",
"q1",
"q2",
"q3",
"wx",
"wy",
"wz",
}
assert set(res.variables) == expected
@pytest.mark.parametrize("product_path,swath_pol", SENTINEL1_PRODUCTS)
def test_open_dataset_gcp(
product_path: esa_safe.PathType,
swath_pol: str,
) -> None:
res = xr.open_dataset(product_path, engine="sentinel-1", group=f"{swath_pol}/gcp")
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"azimuth_time", "slant_range_time"}
@pytest.mark.parametrize("product_path,swath_pol", SENTINEL1_PRODUCTS)
def test_open_dataset_dc_estimate(
product_path: esa_safe.PathType,
swath_pol: str,
) -> None:
res = xr.open_dataset(
product_path, engine="sentinel-1", group=f"{swath_pol}/dc_estimate"
)
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"azimuth_time", "degree"}
def test_open_pol_dataset() -> None:
product_path = (
DATA_FOLDER
/ "S1B_IW_SLC__1SDV_20210401T052622_20210401T052650_026269_032297_EFA4.SAFE"
)
expected_variables = {
"measurement",
"line",
"pixel",
"slant_range_time",
"azimuth_time",
}
res = xr.open_dataset(product_path, engine="sentinel-1", group="IW1/VV")
assert isinstance(res, xr.Dataset)
for attr_name in COMMON_ATTRIBUTES:
assert attr_name in res.attrs
assert res.attrs[attr_name] == COMMON_ATTRIBUTES[attr_name]
assert set(res.dims) == {"line", "pixel"}
assert set(res.variables) == expected_variables
def test_burst_id_attribute() -> None:
product_path = (
DATA_FOLDER
/ "S1A_IW_SLC__1SDH_20220414T102209_20220414T102236_042768_051AA4_E677.SAFE"
)
res = xr.open_dataset(product_path, engine="sentinel-1", group="IW1/HH")
assert "burst_ids" in res.attrs
assert len(res.attrs["burst_ids"]) == res.attrs["number_of_bursts"]
product_path = (
DATA_FOLDER
/ "S1B_IW_SLC__1SDV_20210401T052622_20210401T052650_026269_032297_EFA4.SAFE"
)
res = xr.open_dataset(product_path, engine="sentinel-1", group="IW1/VV")
assert "burst_ids" not in res.attrs
def test_open_calibration_dataset() -> None:
annotation_path = (
DATA_FOLDER
/ "S1B_IW_SLC__1SDV_20210401T052622_20210401T052650_026269_032297_EFA4.SAFE"
)
res = xr.open_dataset(
annotation_path, engine="sentinel-1", group="IW1/VV/calibration"
)
assert isinstance(res, xr.Dataset)
assert set(res.dims) == {"line", "pixel"}
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