source: branches/FACT++_lidctrl_usb/www/smartfact/struct/help-tracking.page

Last change on this file was 18402, checked in by tbretz, 9 years ago
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1Tracking
2|
3When the telescope is tracking (and only during that), it propagates
4some tracking related information through the dim-network. This page
5shows the values of the latest received report.
6
7The control deviation is the deviation measured between the shaft-encoder
8position at the telescope axis and the command position by the controller.
9Theoretically, real mispointing could be larger due to additional
10bending of the structure.
11
12If a dedicated source is tracked, a source name is displayed. If
13the moon is above the horizon, the distance to the moon is displayed.
14
15The colors represent
16<ul class='help'>
17<li>No moon light is directly hitting the G-APDs</li>
18<li>The distance is very close to the direct or indirect field-of-view of the cones.</li>
19<li>The moon is within th efield-of-view. This condition should be avoided as much as possible.</li>
20</ul>
21
22<i>Note that the color scales are not well motivated as of today. Anybody
23is invited to investigate this issue in more details.</i>
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25|<h4>Graphics</h4>
26The graphics display the history of the control deviation. Note that it
27is only updated during tracking and the time axis is just simply binned,
28<I>i.e.</I> that one point represents one service update and they need
29not to be equidistant in time.
30|
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