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chara:fringe_offsets [2022/05/24 19:41] gail_stargazer |
chara:fringe_offsets [2022/06/20 16:38] gail_stargazer |
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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. | ||
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+ | A new baseline solution was created on 2022Jun18 and has been set as the default. | ||
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+ | S1: -0.7 mm to +0.5 mm\\ | ||
+ | S2: -2.6 mm to +0.7 mm\\ | ||
+ | E1: -0.3 mm to +0.4 mm\\ | ||
+ | E2: -0.3 mm to +0.5 mm\\ | ||
+ | W1: -3.8 mm to +0.4 mm\\ | ||
+ | W2: Reference Cart | ||
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+ | {{: | ||
A new baseline solution was created on 2022May19 and has been in use since 2022May22. There seems to be a small dependence on elevation for some of the telescopes. | A new baseline solution was created on 2022May19 and has been in use since 2022May22. There seems to be a small dependence on elevation for some of the telescopes. | ||
- | S1: limited data\\ | + | S1: -1 mm on pop1 down to -6 mm on pop5 [note S1 optics removed and put back in for recoating]\\ |
S2: -0.8 mm to +0.3 mm\\ | S2: -0.8 mm to +0.3 mm\\ | ||
E1: -0.1 mm to +1.8 mm\\ | E1: -0.1 mm to +1.8 mm\\ | ||
- | E2: -0.6 mm to +0.9 mm\\ | + | E2: -0.7 mm to +0.9 mm\\ |
W1: +1.4 mm to +1.7 mm\\ | W1: +1.4 mm to +1.7 mm\\ | ||
W2: Reference Cart | W2: Reference Cart | ||
- | {{: | + | {{: |
A new baseline solution was created on 2022Mar21 and has been in use since 2022Apr03. | A new baseline solution was created on 2022Mar21 and has been in use since 2022Apr03. |