Table 6 Description of the quality flag variables and attributes of the NetCDF files.
From: QUANT: a long-term multi-city commercial air sensor dataset for performance evaluation
Header | Description | Data format |
|---|---|---|
qc_flag_*var | Quality flag indicator. | int16 |
- flag_values: quality indicator in integer format. It can take the values of 1, 2, 3, 4. | ||
- flag_meanings: string format of the quality indicator. These are: | ||
○ None: the data can be considered reliable without specific reservations; | ||
○ Info: additional information, it does not necessarily indicate a problem. | ||
○ Warning: data may have minor issues, but are not serious enough to invalidate the data; | ||
○ Error: the data has significant issues that affect its reliability. | ||
qc_flag_reason_*var | Quality flag reason behind each flag_*var. | int16 |
- flag_values: quality indicator in integer format. For most companies, it can take integer values between 1 and 4, but for others, this can range up to 16 (see *special cases). | ||
- flag_meanings: for the general case, it can take the string values: | ||
○ None: no issues; | ||
○ Retrospectively_collected: the data wasn’t collected right after it was generated; | ||
○ Power_problem: power outage at the site. | ||
*special cases: some companies offer extra metadata (follow the links): | ||
• Environmental Instruments: https://rb.gy/c1qs6t; | ||
• Kunak: https://rb.gy/qoo5z3; |
