How long does the correction remain valid?
• Nighttime: If the corrections are measured at least an hour after sunset, then they should last for the next few hours as the backup structure cools off. This can take many hours if it was a sunny day. At frequencies below 90 GHz, the corrections can be turned off sometime between midnight and 3AM. If a sidelobe begins to appear on a bright pointing source during this time frame, then turning off the corrections should eliminate it. • Daytime: During the daytime, this is a difficult questions to answer, as it depends on how much the pose of the telescope is changing with respect to the Sun, cloud cover changes, etc. The answer can be anything from 1 to 4 hours. In practice, we suggest running an AutoPeak every 30-40 minutes and watching for the reappearance of a sidelobe on the elevation scans. When the sidelobe becomes significant, it is probably a good time for another AutoOOF.
