| The Celestron CN16CGE GPS (Global Positioning System) module mounts on the tripod leg of a Celestron CGE Series go-to computerized German equatorial mount telescope using the supplied snap-on holder. A cable from the CN16 connects to the telescope. It uses GPS satellite transmissions to assure faster and more accurate stellar alignment by requiring no manual data input of time, date, or location on your part.
Once the CN16CGE is mounted on the scope, the scope is taken outside and a rough polar alignment done. An optional polar alignment scope is available to make this procedure quick and relatively painless. A polar alignment subroutine in the computer hand control will aid in refining the alignment if extreme precision is needed for astrophotography purposes.
The 16-channel GPS receiver of the CN16CGE then determines the scope’s latitude and longitude on earth from the GPS satellite signals with an accuracy measured in meters. It determines the time from the GPS satellite signals with an accuracy measured in fractions of a second. Once the CN16CGE knows precisely where and when on Earth it is, it relays that information to your scope’s computer. Your scope’s NexStar computer needs that information to align on the heavens when using a two-star alignment. The more accurate the time and location information you can give to your scope, the more accurate your scope’s alignment on the sky. The CN16CGE guarantees a very high accuracy.
If you travel to different observing locations frequently, the CN16CGE will let you spend more time observing and less time getting ready to observe. If your view of the north from your backyard observing site is obstructed by buildings or trees, the CN16CGE will make short work of accurately aligning your scope on the skies. You won't have to guess if you're pointing at Polaris.
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