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chara:fringe_offsets [2018/09/18 18:27] gail_stargazer |
chara:fringe_offsets [2021/06/02 19:39] 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. | ||
+ | Fringe offsets during 6T MIRCX observations in Mar-Apr 2021 (W2 as reference cart): The current fringe offsets change rapidly depending on hour angle. See {{: | ||
+ | |||
+ | S1: -2.0 mm to +2.0 mm\\ | ||
+ | S2: -2.0 mm to +2.0 mm\\ | ||
+ | E1: +0.0 mm to +3.0 mm\\ | ||
+ | E2: +0.0 mm to +3.0 mm\\ | ||
+ | W1: -1.5 mm to +2.0 mm\\ | ||
+ | W2: Reference Cart | ||
+ | |||
+ | Fringe offsets during 6T MIRCX observations in 2020 June (W2 as reference cart): | ||
+ | |||
+ | S1: -0.7 mm to +1.1 mm\\ | ||
+ | S2: -0.2 mm to +0.6 mm\\ | ||
+ | E1: +0.2 mm to +0.8 mm\\ | ||
+ | E2: +0.6 mm to +1.6 mm\\ | ||
+ | W1: +0.8 mm to +1.3 mm\\ | ||
+ | W2: Reference Cart | ||
+ | |||
+ | Fringe offsets during 6T MIRCX observations in 2019 July-August (W2 as reference cart): | ||
+ | |||
+ | S1: -1.3 mm to +0.2 mm\\ | ||
+ | S2: -1.1 mm to +0.2 mm\\ | ||
+ | E1: -2.0 mm to +0.5 mm\\ | ||
+ | E2: -0.8 mm to +0.7 mm\\ | ||
+ | W1: -0.6 mm to +0.2 mm\\ | ||
+ | W2: Reference Cart | ||
+ | |||
+ | Fringe offsets during 6T MIRCX observations in 2019 July (W2 as reference cart): | ||
+ | |||
+ | S1: -0.8 mm to +0.2 mm\\ | ||
+ | S2: -0.6 mm to +0.2 mm\\ | ||
+ | E1: -1.1 mm to +0.5 mm\\ | ||
+ | E2: -0.4 mm to +0.6 mm\\ | ||
+ | W1: -0.2 mm to +0.2 mm\\ | ||
+ | W2: Reference Cart | ||
+ | |||
+ | NOTE: Theo installed a new baseline solution on 2019Jun26. This is based on Aaron' | ||
+ | \\ | ||
+ | Fringe offsets during 6T MIRCX observations on 2019 May 31 - June 2 (W2 as reference cart): | ||
+ | |||
+ | S1: -2.6 mm to -1.5 mm\\ | ||
+ | S2: -2.6 mm to -1.7 mm\\ | ||
+ | E1: +1.9 mm to +3.4 mm\\ | ||
+ | E2: -2.5 mm to -1.0 mm\\ | ||
+ | W1: +0.6 mm to +1.8 mm\\ | ||
+ | W2: Reference Cart | ||
+ | |||
+ | NOTE: Theo installed a new baseline solution on 2019May09.\\ | ||
+ | \\ | ||
+ | NOTE: Theo installed a new baseline solution on 2019Apr12.\\ | ||
+ | \\ | ||
+ | Fringe offsets during 6T MIRCX observations on 2019 Apr 2+9 (W2 as reference cart): | ||
+ | |||
+ | S1: +3.0 mm to +4.4 mm\\ | ||
+ | S2: +0.3 mm to +0.5 mm\\ | ||
+ | E1: -0.4 mm to -2.3 mm\\ | ||
+ | E2: +5.9 mm to +6.8 mm\\ | ||
+ | W1: +6.3 mm to +8.9 mm\\ | ||
+ | W2: Reference Cart\\ | ||
+ | \\ | ||
+ | NOTE: Theo installed a new baseline solution on 2019Feb20.\\ | ||
+ | \\ | ||
Fringe offsets during 6T MIRCX observations after Phase 2 upgrades in 2018 September (W2 as reference cart): | Fringe offsets during 6T MIRCX observations after Phase 2 upgrades in 2018 September (W2 as reference cart): | ||
- | S1: 4.3 mm to +6.5 mm\\ | + | S1: +4.3 mm to +6.5 mm\\ |
S2: +3.0 mm to +5.0 mm\\ | S2: +3.0 mm to +5.0 mm\\ | ||
E1: -3.0 mm to -0.7 mm\\ | E1: -3.0 mm to -0.7 mm\\ |