This tool let you prepare a mosaic for your camera.
There is two way to open this tool:

• From the menu View, in this case the mosaic is centered on the screen center, corresponding with the last object search.
• From the right click popup menu, in this case the mosaic is centered on the mouse cursor position.

• You can adjust the coordinates of the mosaic center, or use the arrow to move the mosaic.
• The camera rotation can be adjusted to change the global mosaic orientation.
• Give a name to the mosaic, this is use as the default file name and prefix every row in the file.
• Select the Finder rectangle that correspond to your camera. It is better if your imaging software can plate-solve and send the frame to Skychart. This way you get the exact size and orientation automatically.
• Change the size of the mosaic as you want.
• Set the vertical and horizontal overlap in percent.

When ready click the Save button to record the mosaic definition you can later load in your imaging software.

If you want to write your own software to process this mosaic, the content of the file is the following:

EQUINOX=2458714.1
Orion_01 05h47m49s -02d42m13s 30.00 114.76 86.76
Orion_02 05h45m13s -03d49m51s 30.00 114.76 86.76
Orion_03 05h42m36s -04d57m28s 30.00 114.76 86.76

The first row contain the Julian day for the epoch of the coordinates. This can be the current date or J2000 depending on your coordinate setting.

Each following rows contain the following information separated by a single space:

• the mosaic name and a sequence number.
• the frame center right ascension.
• the frame center declination.
• the rotator position.
• the frame width in minute of arc
• the frame height in minute of arc