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The user can manually identify the shifts by diurnal symmetry test - morning vs. afternoon (in kt/h0 space). The second option is to run auto-detection, which automatically suggests the location and value of shifts and drifts in the data. The detected shifts can be manually modified or deleted. The detection runs from a few seconds to a few minutes depending on the volume of data. The automatic recognition identifies these shifts within the recognition uncertainty. Always select the original data if you would like to shift the data manually.
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Component | Description |
Times series graph | Line graph of original records, records after shifting, and clear-sky. Lines is possible to switch off by clicking on the legend (without pan or zoom tool) |
Graph tools | Tools: Reset original view, Back to the previous view, Forward to next view, Pan, Zoom, Edit plot, Edit axis, curve and image parameters, Save the figure. Pan tool is able to use as a zoom tool by right click. |
Kt graphs | Graphs show diurnal symmetry (morning vs afternoon) of original and shifted data |
Shift overview graph | Line graph showing detected shifts in the dataset with uncertainty. The data are broken into segments, each segment has a uniform shift and its uncertainty. |
Dataset | Input dataset for Time reference check |
Column | Input column for Time reference check. The detection of time shifts is only based on this column. It must be either GHI or GTI type column. |
Time shifts arrow | Shows/hides the list of existing shifts |
Existing shifts | List of existing shifts |
New shifts | List of new shifts. You can disable time shift by checkbox. After running the auto-detection, the shift is shown with its uncertainty. The color shows the confidence of detected shift: green - high, yellow - medium, red - low. |
Auto-detection | Runs the automatic shift recognition. |
Import | Opens time shifts importer. You can choose another dataset and import time shifts from them. |
New | Creates a new shift. It is possible to create a new shift by selecting the time span in Time series graph (pan and zoom tools must be disabled). |
Remove | Deletes shift |
Reorder | Reorder time shifts from lowest to highest time stamp. |
Time from | Datetime setting the beginning of the span. |
Reset min | Resets datetime field to minimum possible value. |
Time to | Datetime setting the end of the span. |
Reset max | Resets datetime field to maximum possible value. |
Time shifts | Sets time shift value |
Draw kt diagrams only for the active shift | Allows you to display all records or only records from the actual time shift span. |
Redraw graphs | Redraws graphs by actual shifts and settings |
Settings | Opens settings window consisting of marker size setting and marker transparency setting for kt plots. |
Save | Saves changes |
Final save | Saves changes and QC status “TIME_REFERENCE_CHECK” will be assign to the dataset. |
Save as | Saves changes into the copy of dataset and QC status “TIME_REFERENCE_CHECK” will be assign to the dataset. |
Close | Closes window |
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Multi component tests compare related parameters against each other within a test group.
Single component test requires a parameter within a test group.
We recommend to group related parameters e.g. SPN1 GHI and DNI measurements.
Use flag icons to indicate which quality control results to save for particular parameter.
Flags of a parameter can be saved only within one test group.
Analyst pre-fills test groups by default after import. To change parameter assignment or add / remove test groups use test group editor.
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Component | Description |
Irradiance columns | Select columns of irradiance data type you want to quality check. Flags will be calculated into respective flag columns. Assign columns into groups - this is required for performing consistency test - testing calculated irradiance components versus measured. |
Advanced settings | Opens separated dialog with automatic quality check advanced settings. |
run between | Quality check can be performed on a subset of the dataset. If checked, values from both calendar widgets are taken into account. |
date from, date to | Defines a subset of the dataset by selecting two dates. |
Graph | The graphs including the QC flags are displayed. |
Irradiance components | The user can select the irradiances component to be displayed. Plot settings menu is active only for these Graph tabs: Heatmap flag plot, Time series flag plot. |
split heatmap by year | If checked, the heatmap is split by years. This checkbox is active only for the Heatmap flag plot. |
view in time zone | The time zone can be selected. |
Edit test groups | The user can edit, create or delete a test group. |
Run | Will start the process of automatic quality check. The result of the procedure is a flagged instance of every data record (if there are no flag columns, they will be created). Preview dialog (Quality report) is provided to let the user review the results. |
Save flags | This button is only enabled after running the quality check. It permanently saves generated flags into the dataset. QC status “AUTOMATIC_QUALITY_CHECK_IRRADIATION” will be assign to the dataset. |
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Test Groups are prefilled by default based on column order. In case default test groups do not correctly assign parameters, it is recommended to reorder columns via metadata editor and set default test groups. It is also possible to manually modify test groups.
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Advanced settings
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