Australia Telescope National Facility

The scan number in the schedule.

The name of the source.

This column will be blank if the calibrator code is not set, or C or B if the appropriate calibrator code is set.

The right ascension of the scan.

The declination of the scan.

The epoch of the position.

The time at the start of the scan. If the TimeCode of the schedule is LST then this is shown as LST; likewise with UTC TimeCodes.

The time at the start of the first scan is always the same as is specified in the Time field for that scan. For subsequent scans the time here includes the time spent on the previous scan and the time required to slew from the previous position to this position.

Note that it will not necessarily be accurate when the previous scan is a pointing, paddle or mosaic scan, where the ScanLength is not necessarily representative of the actual time spent on the scan.

The length of the scan, in hours, minutes and seconds listed as hh:mm:ss. This is only what is listed in the scheduler, and does not consider the actual amount of time that will be spent on the scan if it is a mosaic, pointing or paddle scan.

The azimuth of the source at the time listed in the Time column, in degrees, minutes and seconds.

The elevation of the source at the time listed in the Time column, in degrees, minutes and seconds.

The time required to slew to the source from the previous scan position. For the first scan, the drive time is the time required to slew from the stow position.

If the elevation of the source is below 12° then the drive time is shown as 00:00:00 because of course the telescope cannot perform the scan.

This column will only be present if the scheduler is in the advanced view mode. The wrap that is specified in the scheduler Wrap is displayed here; it does not compute what the wrap will actually be during the observations.

The type of scan (eg. dwell, point, paddle etc.).

The pointing solution to use for the scan.

The centre frequency of the CABB continuum IF1, in MHz.

The centre frequency of the CABB continuum IF2, in MHz.

The width of each continuum channel in IF1, in MHz. This column will only be present if the scheduler is in the advanced view mode.

The width of each continuum channel in IF2, in MHz. This column will only be present if the scheduler is in the advanced view mode.

This column will show whether the scan has been assigned as a master frequency scan, or if it is slave to another scan. If the column is blank, or null then it is neither a master or a slave.

This column will only be present if the scheduler is in the advanced view mode.

The velocity as specified in the scheduler's CatVel field. This column will only be present if the scheduler is in the advanced view mode.

The number of cycles that will be averaged together for this scan. This column will only be present if the scheduler is in the advanced view mode.

Opens a pre-existing schedule from the server.

Saves the schedule with the name that it already has. If the schedule does not currently have a name, this action will not work. This action saves the schedule to the server, ready for loading in caobs.

Allows the schedule to be saved with a different name than it currently has. If the schedule does not currently have a name, this action is the only way to save it to the server.

Load a schedule that you have saved on your local computer (instead of from the common schedule area that caobs can access). When this action is selected, a file selection area will appear at the bottom of the scheduler screen asking you to Select schedule file. Use the Browse button to find the schedule you want to load and then click the Submit button, or press the Cancel button to cancel this action.

Saves the schedule to your local computer (instead of to the common schedule area that caobs can access). Use this option if you're not ready to, or not able to (due to ATNF access restrictions) save to the remote server. You will be prompted to save a file called cabb.sch on your local disk.

Closes the current schedule and resets the interface back to an empty schedule with 1 generic scan and no schedule name.

Removes the currently selected scans from their position in the schedule, but keeps it in memory so that they can be inserted elsewhere.

Copies the currently selected scans into memory so that they can be inserted elsewhere.

Copies the scan information held in memory from a prior Cut or Copy action back into the schedule, as scans after the currently selected scan. This moves all subsequent scans down by the number of scans that are pasted in. It is not possible to Paste a scan into position 1 in the schedule.

This menu item will only be present if the scheduler is currently in “Simple View”. Selecting it will make the scheduler display more fields than are strictly required to make a simple schedule.

This menu item will only be present if the scheduler is currently in “Advanced View”. Selecting it will make the scheduler display on the fields that are strictly required to make a simple schedule. However, all of the advanced fields will retain their settings irrespective of the scheduler view mode.

Allows a change in one scan to be duplicated in all other scans. The scan/scans to change should be selected first, followed by the Global change menu item. While the global change mode is activated, it is not possible to change the set of selected scans. Make as many changes to the scan as is necessary, in any of the Scan Parameters, Freq1 and Freq2 tabs, and then select either the Global Apply button to confirm the changes and duplicate them in all the other scans in the schedule, or the Global Cancel button to keep the changes but do not duplicate them.

The button Global Apply Selected is used to effect the changes only to the scans that were selected before entering global change mode.

The button Global Apply Matching is used to duplicate the changes only to other scans that initially matched the scan being changed. An example of this is for a schedule that has multiple frequencies in a single IF. Consider a schedule that has scans with IF1 frequencies of 5500, 5700 and 8600 MHz. If a scan with an IF1 frequency of 8600 MHz is changed to 8700 MHz, and the Global Apply button is used, then all scans in the schedule will be changed to have an IF1 frequency of 8700 MHz. However, if the Global Apply Matching button is used, then only scans that have an IF1 frequency of 8600 MHz, like the selected scan, will be changed.

It is also important to note that if nothing changes, then using the Global Apply button will not do anything. For example, if a scan is changed individually from Project=C123 to Project=C124, and this change needs to propagate to all scans, then simply deleting the entry in this scan and replacing it with the same thing while in Global change mode will not work, as it will still appear as though the entry has not changed. Instead, move to another scan where the Project code has not changed before entering Global change mode.

Another important caveat is that even though more than one scan can be selected before entering global change mode, only the parameters of the first selected scan will be displayed in the scheduler fields.

Goes through the schedule and recomputes all frequency and velocity information present. This is useful to execute when you change the Date field, to ensure that all the zoom mode information is correct.

Use this menu item to load a catalogue of sources from a local machine into the scheduler, which can then be inserted into the schedule with the Pick Source button.

If the Pick Source button is used before a local catalog is loaded, then a frame allowing a catalog is shown. However, after this catalog is loaded, subsequent selections of the Pick Source button will display only the Source Selection frame. To show the catalog loading frame again, so that a different catalog can be loaded, use the Load local catalog menu item.

Use this menu item to load a catalogue of sources from the remote database into the scheduler, which can then be inserted into the schedule with the Pick Source button. These remote catalogues include the VLA and AT calibrator catalogues, among others.