Your Observing Graphic Interface

The following tools have been already implemented in the YOGI: dATAview, Telescope, Camera, Filters, Map, Command.

1. dATAview - general image viewing tool which displays images read from the disk (FITS format), Shared Memory or delivered by the Image Server. Images can be viewed in the three different windows: general view , default, large size image and in zoomed box. Digital details of the images may be inspected in the graphic window, which is capable of displaying cuts, histograms, radial profiles, surface and contour plots as well as showing magnitudes or FWHM of the selected stars. Grapic window contains telescope focusing tool. Control window enables rambling or looping through the series of images and controls many other features like measuring star magnitudes, distances, angles, offsetting the telescope, marking frame orientation, integrating multiple images, masking bad pixels or subtracting sky frames.
2. Telescope tool is a general tool for positioning and offseting the telescope. Besides the obvious functions like displaying and entering target coordinates it contains also input coordinates dials, arrow panel for manual offseting, switch for different offset coordinate systems, equinox selector/converter, Cassegrain position input/display, current time display (UT, siderial, JD). It gives indication whether the telscope points to the required object, is offseted or is moving (animation). Telescope tool will show actions started within other tools, e.g. Map , dATAview or Camera Mosaic .
3. Camera is a dedicated tool for controling image aquisition instruments. Currently it supports three infrared instruments: MAGIC , OMEGA and MAX , but could be easily adapted for any other imaging or spectroscopic system based on IR arrays or CCD detectors. Camera tool controls mainly specific camera functions: readout modes, exposure time, number of exposures, but also data managing (entering comments, object names), data saving (paths, filenames, disk-space), macro and mosaicing capabilities (generating, recording, replaying, pausing).
4. filters tool controls filter selection. It is separated from the Camera tool for more flexibility. Wheels supports any number of wheels with any nuber of positions - configurable on fly with the Data Base. Wheels tool serves both as an input (pull-down menu or graphic) and status display (with animation).
5. Map is a multipurpose tool which serves as a sky atlas, SAO catalogue and IRAS catalogue. It also displays objects from one of many user catalogues. Sky map can be zoomed and telescope position is always marked on the display. To move the telescope to the new position it is enough to select an object on the map (or in the text window in case of user objects) and press MOVE button. Map tool may show also airmass window telling the observer whether the selected object is high enough to be observed. Map displays locations of the images taken during the current session, which is especially usefull when creating time consuming mosaics. Spectral types of the stars could be visualised with different colors - feature usefull when one needs to find appropriate check star.
6. Command tool is intended for users that prefer keyboard rather than mouse input. Nice feature of the commant tool it is history buffer (scrollable window) allowing one for reselecting previously issued commands. Command tool is usable only for the systems which have command language layer behind the Graphic Interface. However this is the case for the Omega/Magic/Max system.

• Data Base Server - the heart (or rather brain) of the system, which interfaces graphic modules to the command language layer. Data Base Server may run remotely, what enables (in theory) remote graphic instrument control.
• Image Server which is capable to deliver images over the net to the remote dATAview tool. During remote operation graphic tools are executed on the remote machines and only vital data are send over the net. However if the is was too slow, then remote operation may not work properly.
• Command Server which acts as an interface between the Data Base Server and the command language layer controling instrumentation.

You may now slect to go to Tutorial or Frequently Ask Questions or Feedback or Technical Refernce Manual.