The residual plotting tool is shown in the Figure below. It allows the user to plot residuals from first (only clock functions and one zenith wet delay per station estimated) and main (all parameters estimated) solutions. Those can furthermore be visualized per station, per baseline and per source to e.g. detect problematic sources, stations or baselines.
By clicking Load all sessions in the chosen folder ('/' corresponds to /DATA/LEVEL3/ are loaded by the program and shown in the second popupmenu. In the second popupmenu you can switch to a particular session, which will be displayed in the window immediately. If nothing seems to happen the chosen folder might be empty.
If a session contains a clock break, a jump in the residuals at the epoch of the clock break might be observed. This can be removed interactively when station-wise residuals are plotted. The user has to click Add clock break, select the time epoch of the clock break (simply click with the white cross on the plot; the y-value is not important) and confirm that the information is written to the OPT-file. The OPT-folder will be the same as chosen in File - Set input files. The clock-break will be applied the next time this session is analyzed with VieVS.
Outliers can be removed by clicking Select outliers in the residual plot window. The user can either click on one value or drag-open a box containing the outlier values. All values will be marked with black crosses. To write all those values to the OUTLIER file, the button Remove Outliers must be pushed. Similar to the clock break information, the outlier information is written to the outlier folder selected in File - Set input files. The outliers will be removed right at the beginning in all following VieVS runs.
In this block you can select data on the residual plot manually or you can assign a particular time span during session time. The selected data are written in the OPT-file.
It is designed to do the selection as follows:
Select time span by your mouse on the window. As a result of your action you will see
Doing either way manually or not:
If you would like to come back in manual mode, click once more on Display and start select data by mouse in the window.
The selected data for Station or Source in the block Plot per can be removed by writing in OPT-file. Whatever time span you selected, click on Remove. An appeared info message lists the time span which you are going to write down in OPT-file and the directory where this file is located. You can confirm this action YES or cancel NO.
To visualize estimated parameters, VieVS includes a plotting window (Plotting - parameters. Besides the axes on the right, there are three panels where you can load data separately - the three panels plot the data in different colors (panel1: black, panel2: red, panel3: blue) for e.g. comparison. To load data, select the subfolder you chose before processing (if you did not select any, leave '/') and click on Load. All the sessions which are in the selected directory appear in the popupmenu One session. Select this radiobutton to plot single session, otherwise (if you want to plot parameters from all those sessions) click All sessions. Select the parameter and station (only needed for station dependent parameters, such as station coordinates, zenith wet delays or tropospheric gradients) and select Plot below. If nothing appears on the axes, the parameter you selected was not estimated for the chosen session.
You can save values depicted in the window to the text file by clicking Save values as … (text-file) or as a figure-file Save as … below.
In Plotting - Session analysis next session-related informations can be plotted:
Up to four sessions can be selected to visualize the station network. The baseline length repeatability can be plotted for up to four data sets (do not forget to check Add network/BLR below the folder).