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chara:fringe_offsets [2022/03/09 03:17] gail_stargazer |
chara:fringe_offsets [2022/03/10 00:48] 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. | ||
- | Starting in 2022, it seems the baseline solution has drifting, and the offsets are again trending rapidly negative with increasing hour angle. Here are some recent offsets from 2022 Mar 2-8: | + | Starting in 2022, it seems the baseline solution has drifted, and the offsets are again trending rapidly negative with increasing hour angle. Here are some recent offsets from 2022 Mar 2-8: |
S1: -0.5 mm to 3.8 mm\\ | S1: -0.5 mm to 3.8 mm\\ | ||
S2: -1.5 mm to +2.6 mm\\ | S2: -1.5 mm to +2.6 mm\\ | ||
- | E1: 0.0 mm to +3.3 mm\\ | + | E1: +1.5 mm to +4.4 mm\\ |
E2: -3.0 mm to +4.0 mm\\ | E2: -3.0 mm to +4.0 mm\\ | ||
W1: -0.5 mm to +4.5 mm\\ | W1: -0.5 mm to +4.5 mm\\ |