The Info view is used for two the following purposes; :
- display the progress of an image exposure
...
- set certain exposure/image related parameters in LOIS
- enable and set up sound for certain actions related to the exposures
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LOIS parameters
This view can and should be used for setting the following parameters in LOIS:
- Observer Info
- Names
- Affiliations
- Image Info
- File Path; default value from config file
- Root File Name; default value from config file
- Initial Image Number; defaults to 1
- Directory Path Date Extension; default value from config file
- FITS Extension; default value from config file
- Image Number Separator; default value from config file
Pressing the "Apply" button sends the commands to Lois to set Observer Info and the Image Info. Check LOIS Log to see if the commands were successful. You can Change Observer or Path information independently. Generally, one only needs to set the Observer information. The path information should be correct based on the values set in the config file for each instrument. The image path and name is displayed in the title of the collapsible widget. If any of the parameters for the image need to be modified, use the chevron to expand the section. The changes will be displayed in the title bar in real time but will not take affect on LOIS till the "Apply" button is used.observer info (names & affiliations) parameters in LOIS. Generally, one would need to set the Observer information at the beginning of the night.
Observer Info
The names and affiliation of the observers should be set in this section. If Either either of the two AREAS is blank it will remain as it was in LOIS's cache and most likely be incorrect. These parameters will be inserted in the FITS headers and are subjected to the same restrictions as all FITS headers; <= 72 characters. Clicking the "Set ..." button will also make sure that the data are stored on the correct subdirectory.
Image Info
The widget for image information is pre-filled for each instrument based on the relevant values in the MasterInstrumentConfiguration.xml. For instance for LMI the section looks like:
...
<storage-config>
<path></path>
<telescope-id></telescope-id>
<instrument-id>lmi</instrument-id>
<filename-abbr>lmi</filename-abbr>
<root-filename-date>false</root-filename-date>
<date-noon-rule>true</date-noon-rule>
<dash-number>off</dash-number>
</storage-config>
Sound Effects
We currently can generate alert sounds for 4 actions in the LOUI:
- End of Readout
- End of Exposure
- End of Series
- Blocked Exposure
The alert sounds are disabled by default and here is where the user can select the sound file to play for each action.
Under certain circumstances, such as bad telemetry, an exposure is blocked by LOIS so setting this sound will be very helpful for catching these cases if one is not looking at the LOIS logs carefully. "End of Exposure" notification will happen when the shutter is closing and readout starting. This notification will happen for all exposures except the last exposure in the series. If number of exposures in the series is 1, this sound will NOT play but instead the "End of Series" sound will play.
It is recommended that if an observer wants to set the "End of Exposure" sound, the "End of Series" sound should also be set.
with the following result:
Information Display
...
- Exposure Progress Bar
- CCD Readout Indicator
- Observer Info
- Image File Info (path & name)
Disk Storage Info
Note 
Exposure Progress Bar
The progress bar shows the progress of each exposure. This is basically a timer that starts at the time the exposure begins and is not synchronized with LOIS. So it is possible that under rare circumstances it may be wrong. For instance if for some reason LOIS crashed in the middle of an exposure, the progress bar will continue without any indication of a problem. If an exposure is aborted via the LOUI, the progress bar will reflect the action by changing the text and the font color.
CCD Readout Indicator
This indicator is useful for the larger CCDs such as NASA42 and LMI where the CCD readout can take many seconds. The indicator is based on LOIS log statements and can be very rough.