Datasets:

Scallions
/

Greenland-GPS-PWV

Error code:   DatasetGenerationError
Exception:    UnicodeDecodeError
Message:      'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte
Traceback:    Traceback (most recent call last):
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1835, in _prepare_split_single
                  for key, table in generator:
                                    ^^^^^^^^^
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 621, in wrapped
                  for item in generator(*args, **kwargs):
                              ~~~~~~~~~^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/text/text.py", line 98, in _generate_tables
                  batch = f.read(self.config.chunksize)
                File "/usr/local/lib/python3.14/site-packages/datasets/utils/file_utils.py", line 838, in read_with_retries
                  out = read(*args, **kwargs)
                File "<frozen codecs>", line 325, in decode
              UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8b in position 1: invalid start byte
              
              The above exception was the direct cause of the following exception:
              
              Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1379, in compute_config_parquet_and_info_response
                  parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
                                                                        ~~~~~~~~~~~~~~~~~~~~~~~~~^
                      builder, max_dataset_size_bytes=max_dataset_size_bytes
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                  )
                  ^
                File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 956, in stream_convert_to_parquet
                  builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
                  ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1702, in _prepare_split
                  for job_id, done, content in self._prepare_split_single(
                                               ~~~~~~~~~~~~~~~~~~~~~~~~~~^
                      gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                  ):
                  ^
                File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1887, in _prepare_split_single
                  raise DatasetGenerationError("An error occurred while generating the dataset") from e
              datasets.exceptions.DatasetGenerationError: An error occurred while generating the dataset

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End of preview.

Greenland GPS PWV — pilot year 2020

数据进度与范围 / Status & Coverage

最后更新 (last updated): 2026-11-11 06:27 CST (UTC+8) 试点年份 (pilot year) 2020；区域 (region) 55–84°N, 80–10°W

部分 (part)	状态 (status)	时间范围 (temporal)	空间/分辨率 (spatial)	内容/变量 (variables)	文件数 / 大小 (files / size)
NGL GNSS ZTD (`raw/ngl/`)	✅ 完成 (done)	2020 全年 (yearly zips)	205 个候选测站, 124 个有 2020 年数据 (stations with 2020 data)	5 分钟 ZTD、梯度 (5-min tropo)	121 / 0.22 GB
ERA5 单层 (`raw/era5/era5_sl_*`)	✅ 完成 (done) 12/12 (100.0%) 月	计划 2020-01 – 2020-12；已上传 2020-01 – 2020-12	区域子集 (regional subset)	地面气压/温度/TCWV 等 (single-level fields for ZHD & comparison)	12 / 1.29 GB
ERA5 气压层 (`raw/era5/era5_pl_*`)	✅ 完成 (done) 12/12 (100.0%) 月	计划 2020-01 – 2020-12；已上传 2020-01 – 2020-12	0.5°, 3 小时 (3-hourly), 27 层 1000–100 hPa	t, q, z（用于 Tm）	12 / 3.11 GB
IGRA2 探空 (`raw/igra2/`)	✅ 完成 (done)	全记录 (period of record)	12 个探空站 (radiosonde stations)	data-por + derived-por	24 / 1.08 GB
逐小时 PWV (`processed/pwv_hourly/`)	✅ 完成 (done) 12/12 (100.0%) 月已处理 (months processed)	已处理月份 (processed months): 2020-01, 2020-02, 2020-03, 2020-04, 2020-05, 2020-06, 2020-07, 2020-08, 2020-09, 2020-10, 2020-11, 2020-12	119 个测站 (stations)	PWV (mm) + 质量标记 (QC flags)	119 / 0.11 GB

与 ERA5 TCWV、IGRA2 的对比结果在 12 个月处理完后生成于 processed/comparison/（目前为基于 NGL 自带 PWV 的临时对比 provisional）。

Hourly GNSS precipitable water vapour (PWV) for ~119 GNSS stations in Greenland, Iceland and the Canadian Arctic (55–84°N, 80–10°W), derived from Nevada Geodetic Laboratory 5-min zenith total delays, with ERA5-based ZHD (Saastamoinen) and Tm, and comparisons against ERA5 TCWV and IGRA2 radiosonde PW. See METHODS.md.

Layout

raw/ngl/ NGL IGS20 tropo yearly zips (+ station list files), raw/era5/ monthly ERA5 NetCDF (single + pressure levels), raw/igra2/ IGRA2 data-por / derived-por zips. Full manifest with md5 and source URLs: manifest_raw.csv.
processed/pwv_hourly/ per-station hourly PWV with quality flags; processed/igra2/ 2020 radiosonde PW; processed/comparison/ stats tables and figures.
stations.csv station list (name, lat, lon, ellipsoidal height, data span).

Sources, licences, citations

GNSS ZTD: Nevada Geodetic Laboratory, http://geodesy.unr.edu. Cite: Blewitt, G., Hammond, W. C., Kreemer, C. (2018), Harnessing the GPS data explosion for interdisciplinary science, Eos 99, doi:10.1029/2018EO104623. Freely available; please acknowledge NGL and the original GNSS data providers (e.g. GNET/DTU Space & SDFE, IMO Iceland, NRCan).
ERA5: Hersbach, H. et al. (2020), The ERA5 global reanalysis, QJRMS 146, 1999–2049, doi:10.1002/qj.3803. Data: Copernicus Climate Change Service (C3S) Climate Data Store, doi:10.24381/cds.adbb2d47 and doi:10.24381/cds.bd0915c6. Licence CC-BY 4.0. "Contains modified Copernicus Climate Change Service information 2020."
IGRA2: Durre, I., Yin, X., Vose, R. S., Applequist, S., Arnfield, J. (2018), Enhancing the Data Coverage in the Integrated Global Radiosonde Archive, J. Atmos. Oceanic Technol. 35, 1753–1770; Durre, I., Vose, R. S., Wuertz, D. B. (2006), J. Climate 19, 53–68. NOAA NCEI, public domain.

Derived products (this repo's processed/) are released under CC-BY 4.0.

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