
viii ,
February 2003
Disclaimer
This document is the work of the author. No guarantee is made whatsoever about
any information in this document. Using it may cause your telescope to melt into a
pile of carbon and silicon. Use it at your own risk.
Although this document describes communications used within Celestron's
product, Celestron has not endorsed this information and hence it may change or
become invalid at any time.
If anyone finds errors, omissions, or additional information pertinent to this
document, please send them to me so it can be included.
About the author
Andre Paquette is an engineering graduate and low level software designer
employed in the telecommunications industry in Ottawa, Ontario. He owns a
Nexstar GPS 8” telescope. Andre has been an amateur astronomer since childhood
and received his first telescope at age 10. His astronomy pictures (such as they are)
can be found at http://www.paquettefamily.ca/astro.
Contact information
Email Andre Paquette, andre@paquettefamily.ca
URLs This document refers to some programs by others. Links to these resources can be
found at:
http://www.paquettefamily.ca/nexstar/
Acknowledgements
A number of individuals have contributed to this project including:
• Ray St. Denis — for help with discovering the various message types, and for
providing input and corrections. Ray has put together a great demo that takes
advantage of the AUX command set.
• Mike Zeidler — for help with editing, defining what’s in and what’s out, and
providing access to equipment.
• Stacey Sheldon — for helping out with (and teaching me) all things PIC related
and with the decoding of the firmware upgrade protocol.
• Carlene Paquette — for editing, formatting, and providing input to this
document. But mostly for the patience.
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