def METHOD_NAME():
    ds = FieldDataset("grid")
    ds.size = 1
    ds["air_temperature"] = [1, 2, 3]
    assert_array_equal(ds["air_temperature"], [[1, 2, 3]])
    ds["ground_temperature"] = [0, 0, 0, 0, 0]
    assert_array_equal(ds["ground_temperature"], [[0, 0, 0, 0, 0]])
    ds["gravity"] = 9.81
    assert ds["gravity"] == pytest.approx(9.81)