1  Introduction 

1.1  General Description 

The Gemini Astronomical Positioning System is a 

professional level computerized device for controlling 

small to medium German equatorial telescope mounts.  It 

was conceived and designed by Rene Gorlich (working in 

close collaboration with Scott Losmandy, Norman Diehl 

and others)

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 as a tool for locating and tracking celestial 

objects, and for organizing both visual observation and 

astronomical imaging sessions.  Even at its first release as 

Level 1 (November 2000), it could be used as a 

completely standalone system, or be controlled from a PC 

using planetarium software or the Gemini Control 

Program (GCP) developed by Daniel Gorlich.  Each 

subsequent upgrade (Levels 2 and 3) added to its 

functionality, its convenience of operation, and its remote 

control capabilities. 

The Gemini has many features to help you be efficient 

and save time in your astronomical observations. 

Although most should be intuitive, careful reading of this 

manual will shorten your learning curve and ensure success.   

One unique feature of the Gemini is its ability to perform all of its functions by 

navigating multiple menus using only five buttons and a single LED readout.  

While the alternative would be a control panel with multiple specialized controls, 

the simplicity of the Gemini system allows for almost unlimited upgrade without 

rendering the basic hardware obsolete. 

The Gemini is available as a retrofit kit, or pre installed on your telescope mount at 

the factory.  The most recent version of Gemini s software, Level 3, is provided 

with all new telescope mounts.  This level is also available as a simple plug in 

upgrade to anyone who already owns Level 1 or Level 2. 

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Rene Gorlich:

  Original concept, control electronics, and all software programming, except for the servo subsystem. 

Scott Losmandy:

 Had developed a servo motor board at Aveox, Inc., developed all the mechanical parts, named the 

combined/finished device "Gemini," and is the producer. 

Norman Diehl: 

Co developed control electronics for the 

stepper motors (including DSC capabilities), and assisted with development of Gemini's circuitry and board layout. 

George Radda and David Palombo:

 Developed the servo control, final board layout, and software for the servo 

processor's manufacture (at Aveox, Inc.). 

Wolfgang Steinicke:  

Revised NGC/IC catalogue. 

Peter Ward: 

Southern 

hemisphere testing. 

Many ideas for features and improvements from all.

Gemini Users Manual 

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