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Message: <blockquote data-quote="dreambox1959" data-source="post: 1160115" data-attributes="member: 314801">I am finalizing an Excel spreadsheet to find all satellite positions from the SATXML list.I had already done that for the polar mounts but for the EGIS engine or the AZ/EL mounts the calculations are different.I used the formulas from the SATLEX.BE site which I integrated into an Excel spreadsheet.If, like UDO or me, we want to have the index 9000 due south (90.00°) we must add a value that I call offset, it is this value that the motor must validate when it detects the AZ origin.Same thing for the elevation when it detects the EL origin, this value will be determined by on-site testing (depending on the offset antenna or prime focus of its fixation etc.).</blockquote>