{"columns":[{"name":"PM10 (OPC) (ug/m3)","type":"double"},{"name":"PM2.5 (OPC, c15) (ug/m3)","type":"double"},{"name":"PM1.0 (OPC, c15) (ug/m3)","type":"double"},{"name":"NO (chemiluminescence) (ug/m3)","type":"double"},{"name":"NO2 (chemiluminescence) (ug/m3)","type":"double"},{"name":"NOx (chemiluminescence) (ug/m3)","type":"double"},{"name":"Air temp (deg.C)","type":"double"},{"name":"Rel_hum (%RH)","type":"double"},{"name":"Air pressure (hPa)","type":"double"},{"name":"datetime","type":"timestamp[ns]"}],"n_rows":69,"rows_kept":69,"cut":false,"text_format":"parquet-jsonl-2026-10-02","bounds":{"document_bytes":16777216,"package_text_limit_bytes":33554432,"package_text_slack_bytes":1024,"rows_first":2000,"rows_last":500,"rows_between":2000,"halvings":0,"cell_chars":16384,"cell_head_chars":4096,"vector_min":64,"vector_head_fixed":16,"vector_head_variable":64,"kv_value_chars":1048576,"nesting_max":64,"binary_text":true},"cells_cut":0,"cells_bad_utf8":0,"cells_raw":0,"cells_binary":0,"cells_binary_text":0,"cells_vector":0,"n_row_groups":1,"reader":"pyarrow 23.0.1, python 3.13","created_by":"parquet-cpp-arrow version 17.0.0","schema":{"fields":[{"name":"PM10 (OPC) (ug/m3)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"PM2.5 (OPC, c15) (ug/m3)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"PM1.0 (OPC, c15) (ug/m3)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"NO (chemiluminescence) (ug/m3)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"NO2 (chemiluminescence) (ug/m3)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"NOx (chemiluminescence) (ug/m3)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"Air temp (deg.C)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"Rel_hum (%RH)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"Air pressure (hPa)","type":"double","nullable":true,"metadata":null,"children":null},{"name":"datetime","type":"timestamp[ns]","nullable":true,"metadata":null,"children":null}],"parquet":"required group field_id=-1 schema {\n  optional double field_id=-1 PM10 (OPC) (ug/m3);\n  optional double field_id=-1 PM2.5 (OPC, c15) (ug/m3);\n  optional double field_id=-1 PM1.0 (OPC, c15) (ug/m3);\n  optional double field_id=-1 NO (chemiluminescence) (ug/m3);\n  optional double field_id=-1 NO2 (chemiluminescence) (ug/m3);\n  optional double field_id=-1 NOx (chemiluminescence) (ug/m3);\n  optional double field_id=-1 Air temp (deg.C);\n  optional double field_id=-1 Rel_hum (%RH);\n  optional double field_id=-1 Air pressure (hPa);\n  optional int64 field_id=-1 datetime (Timestamp(isAdjustedToUTC=false, timeUnit=nanoseconds, is_from_converted_type=false, force_set_converted_type=false));\n}\n"},"kv_metadata":[["ARROW:schema",{"$cut":{"chars":3320,"head":""}}],["pandas","{\"index_columns\": [\"datetime\"], \"column_indexes\": [{\"name\": null, \"field_name\": null, \"pandas_type\": \"unicode\", \"numpy_type\": \"object\", \"metadata\": {\"encoding\": \"UTF-8\"}}], \"columns\": [{\"name\": \"PM10 (OPC) (ug/m3)\", \"field_name\": \"PM10 (OPC) (ug/m3)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"PM2.5 (OPC, c15) (ug/m3)\", \"field_name\": \"PM2.5 (OPC, c15) (ug/m3)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"PM1.0 (OPC, c15) (ug/m3)\", \"field_name\": \"PM1.0 (OPC, c15) (ug/m3)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"NO (chemiluminescence) (ug/m3)\", \"field_name\": \"NO (chemiluminescence) (ug/m3)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"NO2 (chemiluminescence) (ug/m3)\", \"field_name\": \"NO2 (chemiluminescence) (ug/m3)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"NOx (chemiluminescence) (ug/m3)\", \"field_name\": \"NOx (chemiluminescence) (ug/m3)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"Air temp (deg.C)\", \"field_name\": \"Air temp (deg.C)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"Rel_hum (%RH)\", \"field_name\": \"Rel_hum (%RH)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"Air pressure (hPa)\", \"field_name\": \"Air pressure (hPa)\", \"pandas_type\": \"float64\", \"numpy_type\": \"float64\", \"metadata\": null}, {\"name\": \"datetime\", \"field_name\": \"datetime\", \"pandas_type\": \"datetime\", \"numpy_type\": \"datetime64[ns]\", \"metadata\": null}], \"creator\": {\"library\": \"pyarrow\", \"version\": \"17.0.0\"}, \"pandas_version\": \"2.2.2\"}"]]}
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