chara:fringe_offsets
Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision | Next revision Both sides next revision | ||
|
chara:fringe_offsets [2021/09/20 18:28] gail_stargazer |
chara:fringe_offsets [2021/09/20 18:28] gail_stargazer |
||
|---|---|---|---|
| Line 3: | Line 3: | ||
| The fringe offsets on any given night will depend on the POP configuration and the daily alignment. The table below gives a range of values where the fringes have been found for each cart on multiple nights across different POP configurations. The ranges should at least provide a guide for how far one might need to look to find fringes. The relative offsets between any pair of telescopes can be calculated from the differences between the ranges. | The fringe offsets on any given night will depend on the POP configuration and the daily alignment. The table below gives a range of values where the fringes have been found for each cart on multiple nights across different POP configurations. The ranges should at least provide a guide for how far one might need to look to find fringes. The relative offsets between any pair of telescopes can be calculated from the differences between the ranges. | ||
| - | The offsets on S2 changed after the primary mirror recoating and realignment in September 2021. We are still using the baseline solution created July 29, 2021. The fringe offsets change rapidly with hour angle of the target. Early hour angles tend to have more negative offsets, positive hour angles tend to have more positive offsets. | + | The offsets on S2 changed after the primary mirror recoating and realignment in September 2021. We are still using the baseline solution created July 29, 2021. The fringe offsets change rapidly with hour angle of the target. Early hour angles tend to have more negative offsets, positive hour angles tend to have more positive offsets. |
| S1: -2.5 mm to +1.0 mm\\ | S1: -2.5 mm to +1.0 mm\\ | ||
chara/fringe_offsets.txt ยท Last modified: 2023/08/30 16:57 by gail_stargazer
Page Tools
Except where otherwise noted, content on this wiki is licensed under the following license: CC Attribution-Share Alike 4.0 International
