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Manual Scheduling

Before you start to create a manual schedule read the wiki about automatic scheduling. Everything must be specified in the Scheduling/General setup and Scheduling/Minor parameters Window first.

The only thing different to the automatic scheduling is, that you have to select manually in the Strategy panel.

Manual Scheduling GUI - auto schedule

After you pressed Save + Run a new window will appear with the manual scheduling options which will look somewhat similar to this. sched_manual.png Although it is calles Manual Scheduling you can also create a schedule automatically until a specific time.

At the top you find a popup menu where you can switch between the automatic mode and the manual mode. You also get some information about your current scheduling time, your current scheduling modified julian date, and about your hours since your scheduling start.


You can switch between different optimization strategies here. :!: normally you will only use Station-based strategy! More Information can be found here.

Fillin mode

Here you can change your fillin-modes. This corresponds to the settings PARA.FILLINMODE in param.txt. If you select both you use fillin mode 12, if you select between scans you use fillin mode 1, if you select after scan you use fillin mode 2, if you select none you use fillin mode 0.

Minimum SNR

Here you can set your minimum signal to noise ratio which is otherwise set in the VieVS main GUI unter Scheduling/Minor parameters.


Here you can change some parameters which are usually described in the param.txt file.

Station network

Here you see a list of all selected stations. You can deselect Stations by simply clicking at them. They should than move to the stations not to use: listbox. If you want to use the station again simply click it at the station not to use: listbox.

individual weight factors

Here you can change your parameters for the individual weight factors which are usually specified in the param.txt file.

minimum number of stations

Here you can change your minimum network size which is usually specified in the param.txt file.


Here you can enable or block subnetting. This corresponds to PARA.SUBNETTING 1 or 2 in param.txt.

schedule until

Here you can select how long the automatic scheduling tool should create the schedule with your selected parameters. You can schedule until a certain date and time, a certain modified julian date, for a specific duration or simply until the end of the session.

:!: Your schedule automatically stops if it reaches the end of a session which was specified in the main VieVS GUI under Scheduling/General setup.

How to start auto scheduling

If everything is set up correctly simply press the start auto sched button.

Manual Scheduling GUI - manual schedule

If you change the popup menu at the header to manual schedule you will see a display similar to this one: sched_manual_II.png

Via the popup menu you can switch between the following sections:

  • recommended
  • sources
  • stations
  • what's up

:!: This is the most important panel. Here you get a list of all recommended scans.

:!: You can in theory change the optimization strategy but currently only station based is supported.

Via the settings button you can change a lot of parameters, most of them are similar to the parameters in the param.txt file. If you change some parameters here, the list of recommended scans will update accordingly.

In the List of recommended scans you get a lot of information about all good and possible scans. If you select the checkbox at the left, this scan will be used next and everything will be filled out at the bottom at the next scan panel. You get information about the internal score of each possible next scan, the start time, duration and end time as well as the number of observations. Additionally the name of the source and the participating Stations are listed. If you use subnetting an additional second source could simultaneously be observed. This will also be listed here.

:!: If you always select the top recommended scan you will end up with the same schedule as the automatic scheduler would produce with this settings!


Here you get some additional statistics about each source. You get a list of the name, the right ascension, the declination and Information if it is a ICRS2 defining source or a star source. You also get the information how often this source was already observed and when.

:!: Note that you can sort this list by using the popup menu above.


This panel shows additional statistics for each station like the current position and their sky coverage.

What's up

This panel shows which source is currently visible from each station.

next scan

At the select source listbox you can select sources which you want to schedule next. Choose one or multiple sources by simply clicking on them. They should now appear at the scans(s) listbox. You can simply deselect sources by clicking on them in the scan(s) listbox.

After you have selected some sources they also appear at the right select source list. Here each line represents one station. In the first column the station name is written. You can specify which station should observe which source by using the dropdown menu at the second column. The next columns show which source is visible from which station.

:!: If you don't want to select the next scans by hand you can select your next scan at the recommended panel. At the left of each possible scan you find a small checkbox. If you check this checkbox everything is set up in the next scan panel.

:!: You can also change your parameters via the settings button again, like in the recommended panel.

If you are happy with your selection click the check and continue » button. Some internal checks were made and if something is wrong you receive an error message. If you receive an error message try a different constellation. This can not be fully avoided because selecting possible next scans is an iterative approach which needs a lot of internal checks.

check and continue

If you pressed the check and continue » button you will get an window like this: sched_manual_III.png

At the left you get a list for each station. It shows which source is observed, the start time, the duration in seconds and the end time.

:!: Note that you can edit the duration and start time by hand. But some internal checks are also applied. For example you can not start your next scan earlier than the required time for slewing and calibration is. If you change the start time for one station it should change for each of the stations in the network. Also the end time should change if you change the duration or the start time.

At the right you get a list of each baselines and the corresponding observation duration for X and S band. If you uncheck the checkbox for one baseline this baseline is not considered to calculate the required scan length. This means if you deselect your baseline with the highest duration the total scan length should be reduced for this station. You can see the effect at the left list if you deselect the longest baseline.

:!: Because changes in one list could influence other already changed things always check your settings at the end carefully.

At the bottom you can specify which fillin modes should be used.

If you are happy with your next scan click at the check with rigorous model and submit » button. Some internal checks are made with some rigorous models. It is possible that you get an error message here, because you scan does not fulfill your conditions with the rigorous models. If this happens please try a different setup.

If everything works you will again see the main manual schedule page and you can select your next scan. You can also always switch back to automatic mode.

public/vievs_manual/scheduling/manual.txt · Last modified: 2017/06/08 11:17 by mschartn