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List of datasets covered by this document
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Acronyms
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Target requirements | |
Spatial resolution | NA |
Temporal coverage | 1st January 1979 - present |
Accuracy | TCDR : < 1 W/m² |
Stability | TCDR : < 0.3 W/m²/decade |
1.3 Data Format
The data comes as a simple ASCII text file that can be opened with many tools such as text editors (e.g. vi, gedit, notepad, etc.), spreadsheets (e.g. excel), and graphical tools (e.g. gnuplot). It contains a header followed by the actual data. The header provides information about the CDR such as the version, type (CDR or ICDR), creation date and time, license, documentation, input time series (instruments) that have been used, and scaling factors. Any user of the data should have a careful look at the header. The data part is organized per line, with 1 line per day, with 23 columns with the content specified in Table 1-4.
Table 1-4: Data format per column of the C3S v3.x daily TSI CDR. Anchor table1_4 table1_4
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Instrument flag code | |
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0 | No data available for this day. The value in the instrument column is “NaN”. |
1 | Data available for this day, but not used in the composite. The non-used value is in the instrument column. |
2 | Data available for this day and used in the composite. The non-used value is in the instrument column. |
3 | Data are not available for this day but interpolation is done. The interpolated value is given in the instrument’s column. |
4 | Data rejected for this day (e.g. outlier), interpolation is done. The original value is given in the instrument’s column. |
The following figure 1-2 shows the beginning of the C3S TSI data file. The two last columns provide the TSI value from the SATIRE-S (
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2014a and 2014b) and the NRL TSI v2 semi-empirical models. These models are not used in the CDR, except SATIRE-S at the very beginning of the record (between 1st January 1979 and 6 November 1980).
Figure 1-2: Beginning of the C3S TSI data file. Anchor figure1_2 figure1_2
The users are invited to read the ATBD [D1], the PQAD [D2], the PQAR [D3], the SQAD [D4] and the TRGAD [D5] documents for additional information on the data product and production system.
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Crommelynck,
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D.
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Crommelynck, D., Domingo, V., Domingo, V., Fichot, A., & Lee, R. (1994). Total Solar Irradiance Observations from the EURECA and ATLAS Experiments. International Astronomical Union Colloquium, 143, 63-69. doi:10.1017/S0252921100024544
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Willson, R.C., S. Gulkis, M. Janssen, H.S. Hudson, G.A. Chapman, (1980): Observations of Solar Irradiance Variability, Science, 211, 700 - 702. doi: 10.1126/science.211.4483.700
Yeo K.L., Krivova N.A., Solanki S.K., Glassmeier K.H. (2014a): Reconstruction of total and spectral solar irradiance from 1974 to 2013 based on KPVT, SoHO/MDI and SDO/HMI observations, Astron. Astrophys., 570, A85. https://doi.org/10.1051/0004-6361/201423628
Yeo K.L., Krivova N.A., Solanki S.K. (2014b): Solar cycle variation in solar irradiance, Space Sci. Rev., https://doi.org/10.1007/s11214-014-0061-7
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This document has been produced with funding by the European Unionin the context of the Copernicus Climate Change Service (C3S) , operated. The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of C3S on behalf onof the European Union (Delegation Agreement signed on 11/11/2014 and Contribution Agreement signed on 22/07/2021). All information in this document is provided “as is”"as is" and no guarantee ofor warranty is given that the information is fit for any particular purpose. The users thereof use the information at their sole risk and liability. For the avoidance of all doubt , the European Commission and the European Centre for Medium - Range Weather Forecasts have no liability in respect of this document, which is merely representing the author’sauthor's view. |
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