Important: The following new feature requires a license dated August 1, 2020 or later. If your license is older you can get access to these features by purchasing a license renewal. The renewal license never expires so you will always be able to use this new feature.

APCC Pro has had pointing and tracking rate correction since it was launched. The correction values are based on an pier-side model, best fitting all of the acquired data points in each pier side. This does a really good job of improving pointing and tracking rate accuracy, but sometimes localized behavior deviates from the model slightly.

The model for Dec-Arc tracking is created by optimizing and best-fitting the pointing errors along declination arcs (paths) that APPM usually follows. This improves the tracking rate accuracy in areas where there are enough data points to create a good dec-arc mode (5-7 points per declination arc is a good baseline).

Enabling Dec-Arc tracking is as simple as setting a check box in APCC Pro. It can be enabled/disabled at any time which allows you to easily compare its tracking rate quality with that of the all-sky model.