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Dataset property | Achieved | Target requirement | ||||||||||
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Geographic coverage | Global | Global | ||||||||||
Temporal coverage | 01/1979 - 12/2017 | Multi-decadal and up-to-date | ||||||||||
Random error | Absolute:
| n/a | ||||||||||
Relative: | ||||||||||||
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Systematic error | 100% achieved* | 0.3 mm/d | ||||||||||
Stability | 0.027 mm/d/dec*,** | 0.034 mm/d/dec |
Info | ||||||||||||
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Table 3: Characteristics of the GPCP monthly mean precipitation rate v2.3 (ICDR – Jan 2018 onwards) Anchor table3 table3
Dataset property | Achieved | Target requirement |
---|---|---|
Geographic coverage Global Global | ||
Temporal coverage 01/2018 - present Continuous updates | ||
Random error Same distribution as in Table 2 applies. n/a | ||
Systematic error | 100% achieved | 2018 & 2019: 2020 onwards: |
Stability | n/a | n/a |
1.3 Data usage information
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Table 4: Input data for GPCP daily, see Table 1 and algorithm description in [D2]. Anchor table4 table4
Name | Data type | GPCP time period | Data source | Notes |
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RSS SSMI Tb CDR | Brightness temperature | 1996 to 2008 | NCEI | Satellite F13 The passive microwave (brightness temperature) observations are used to retrieve precipitation rates over the oceans |
RSS SSMIS Tb CDR | Brightness temperature | 2009 to present | NCEI | Replaces SSM/I Tb; data only from F17 |
GPCP Monthly Analysis V2.3 | Precipitation | 1996 to present | NCEI | Fractional rainfall observations are calibrated by GPCP monthly |
TOVS | Precipitation | 1996 to 2002 | GPCP/GSFC | TOVS-based precipitation estimates (Susskind et al., 1997) merged with SSMI-based estimates and replace those estimates moving poleward from 40 degree latitude. |
AIRS V6 | Precipitation | 2003 to present | GSFC DISC | Replaces TOVS |
IR 3 hourly files | Brightness temperature | 1996 to present | CPC | Infrared observations by geostationary satellites Files include IR histograms and OPI precipitation |
2.2 Target requirements
Table 5 provides an overview of achieved and targeted coverage- and error-related properties of the TCDR dataset. The target requirements (errors, stability) have been formulated in the context of monitoring the quality of precipitation products within C3S via Key Performance Indicators. They refer to the comparison of the dataset to a specific reference dataset. Here, the achieved specifications are computed in comparison with TMPA 3B42 (Goddard Earth Sciences Data and Information Services Center, 2016) which is available between 50°S and 50°N.
Table 5: Characteristics of the GPCP daily mean precipitation rate v1.3 (CDR) Anchor table5 table5
Dataset property | Achieved | Target requirement |
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Geographic coverage | Global | Global |
Temporal coverage | 10/1996 - 12/2017 | Multi-decadal and up-to-date |
Random error | n/a | n/a |
Systematic error | 92.47% achieved* | 0.3 mm/d |
Stability | 0.032 mm/d/dec*,** | 0.034 mm/d/dec |
Info | ||||||||||||
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Anchor | ||||
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Dataset property | Achieved | Target requirement |
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Geographic coverage | Global | Global |
Temporal coverage | 01/2018 - present | Continuous updates |
Random error | n/a | n/a |
Systematic error | 100% achieved | 2018 & 2019: 2020 onwards: |
Stability | n/a | n/a |
2.3 Data usage information
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