After that it runs on the controller's internal clock. Occasionally, e.g. after a power outage or network problems, this synchronization process fails and it is important to check the accuracy of the SUN clock at various times during a run by visually comparing it to the GPS time display. To check for the correct UT time on the web, try this link to the USNO Master Clock . When this problem occurs, a warning message is displayed in the arcon window after your exposure has been read out. If the problem persists, try restarting arcon, then logging out and back in.
Crosstalk is an additive effect and is proportional to the signal strength in a given amplifier.
We are currently working on software to correct for this effect. This page was last modified on September 16 2000.