# Subaru Telescope Primary Mirror In-Situ Measured Reflectivity # Coated with Aluminum on 2017-10-20 # Opened the vacuum chamber on 2017-11-21 # Measured with Subaru Portable Spectrophotometer (SPS) on 2022-01-21 (1554 days after) # Measured three times at around the position 3 # Data between 950 nm and 1650 nm are also available (SPS-XWW). # Contact: Hirofumi Okita (okita14@naoj.org) # # Wavelength (nm) Pos.3 #1 Pos.3 #2 Pos.3 #3 1000 84.06 84.83 84.68 998 84.53 84.15 84.08 996 84.06 84.93 84.01 994 84.50 83.48 83.75 992 84.18 83.46 83.32 990 83.71 83.90 84.29 988 84.58 83.51 83.49 986 84.55 84.18 84.27 984 83.89 83.99 83.96 982 83.59 83.74 84.79 980 84.14 83.36 83.91 978 83.53 84.11 83.46 976 83.90 83.51 83.42 974 83.57 83.90 83.35 972 83.53 83.90 83.45 970 83.62 83.43 84.13 968 83.60 83.36 83.38 966 83.90 84.04 83.58 964 83.09 84.15 84.06 962 84.06 83.89 83.20 960 83.60 84.16 83.65 958 82.74 83.35 83.40 956 83.14 83.30 82.83 954 82.87 83.79 83.71 952 82.44 83.00 83.64 950 82.50 83.09 83.08 948 82.49 82.99 83.49 946 82.51 82.46 82.62 944 82.26 83.09 82.42 942 82.28 82.99 82.36 940 81.97 82.49 82.46 938 81.51 82.92 82.58 936 81.92 82.62 82.65 934 81.99 82.05 82.45 932 81.90 82.74 82.65 930 81.59 82.32 82.49 928 81.78 82.18 81.91 926 81.50 81.96 81.78 924 81.44 81.66 82.15 922 81.32 81.34 81.57 920 81.12 81.83 81.64 918 80.78 81.95 81.51 916 81.03 81.72 81.39 914 80.82 81.01 81.11 912 80.67 81.66 81.38 910 80.46 81.38 81.25 908 80.38 81.04 80.89 906 80.11 80.84 81.05 904 80.43 80.76 80.42 902 80.00 80.41 80.65 900 79.60 80.11 80.30 898 79.35 79.89 80.02 896 79.60 80.06 80.11 894 79.83 79.73 79.75 892 79.45 79.88 79.73 890 78.89 80.03 79.42 888 79.04 79.47 79.41 886 78.78 79.09 79.77 884 78.64 78.96 79.48 882 78.65 79.25 78.90 880 78.53 78.57 78.75 878 78.86 78.72 78.85 876 78.40 78.66 78.38 874 78.16 78.15 78.47 872 77.89 78.28 78.03 870 77.85 77.93 78.16 868 77.72 78.13 78.02 866 77.23 77.84 77.93 864 77.23 77.94 77.14 862 77.01 77.59 77.45 860 77.08 77.44 77.49 858 76.27 77.07 77.41 856 76.50 77.32 77.37 854 76.36 77.17 76.98 852 76.54 76.89 76.87 850 76.50 77.07 76.55 848 76.52 76.68 76.35 846 76.24 76.58 76.65 844 76.07 76.75 76.53 842 75.99 76.53 76.44 840 75.42 76.15 76.09 838 76.00 76.25 76.47 836 75.61 75.97 76.12 834 75.32 75.99 76.00 832 75.71 75.85 75.89 830 75.61 75.94 76.19 828 76.10 76.05 76.41 826 75.84 76.05 76.17 824 75.92 76.09 75.90 822 75.39 75.51 76.09 820 75.41 75.84 76.05 818 75.67 76.25 76.21 816 75.94 76.23 76.20 814 75.66 76.30 76.00 812 75.58 75.79 76.32 810 75.09 76.09 76.24 808 75.76 76.20 76.02 806 75.87 75.93 76.34 804 75.50 76.36 76.08 802 75.59 76.41 76.45 800 75.94 76.48 76.43 798 75.84 76.41 76.41 796 76.07 76.29 76.52 794 76.29 76.42 76.17 792 75.87 76.38 76.19 790 75.94 76.81 76.14 788 76.26 76.62 76.48 786 76.15 76.83 76.54 784 76.07 76.87 76.82 782 76.31 76.94 76.53 780 76.64 76.82 76.78 778 76.30 76.74 76.96 776 76.70 76.70 76.88 774 76.52 76.84 76.90 772 76.45 77.20 76.90 770 76.39 76.97 76.96 768 76.83 77.23 76.97 766 76.71 77.15 77.23 764 76.92 77.38 77.27 762 76.50 77.39 77.18 760 76.84 77.26 77.34 758 77.13 77.67 77.47 756 76.90 77.37 77.52 754 77.38 77.52 77.56 752 77.19 77.58 77.43 750 77.10 77.48 77.36 748 77.24 78.05 77.68 746 77.22 77.56 77.77 744 77.27 77.91 77.74 742 77.44 77.54 77.42 740 77.18 77.81 77.75 738 77.52 77.94 77.69 736 77.43 78.10 77.88 734 77.51 77.68 78.02 732 77.27 78.03 78.08 730 77.46 77.82 78.00 728 77.63 77.91 77.99 726 77.71 78.02 78.20 724 77.52 78.25 78.17 722 77.72 78.10 77.94 720 77.57 78.22 78.09 718 77.69 78.09 78.11 716 77.89 78.18 77.94 714 77.69 78.32 78.06 712 77.79 78.13 78.23 710 77.62 78.24 78.20 708 77.68 78.33 78.22 706 77.86 78.43 78.33 704 77.86 78.30 78.44 702 77.96 78.57 78.55 700 77.73 78.35 78.16 698 77.75 78.23 78.29 696 77.90 78.72 78.31 694 77.90 78.59 78.32 692 77.90 78.40 78.55 690 77.91 78.39 78.36 688 77.84 78.31 78.33 686 77.87 78.49 78.64 684 78.04 78.58 78.50 682 77.79 78.44 78.67 680 77.84 78.68 78.54 678 77.76 78.65 78.35 676 77.99 78.56 78.30 674 77.89 78.59 78.61 672 78.00 78.61 78.57 670 77.88 78.78 78.49 668 77.97 78.73 78.62 666 78.00 78.47 78.70 664 78.11 78.66 78.69 662 77.89 78.55 78.51 660 78.04 78.65 78.57 658 78.16 78.74 78.56 656 78.20 78.53 78.54 654 78.07 78.72 78.55 652 78.00 78.74 78.58 650 78.01 78.51 78.61 648 78.07 78.50 78.64 646 77.89 78.74 78.66 644 78.02 78.82 78.63 642 78.10 78.63 78.58 640 78.24 78.56 78.65 638 78.22 78.72 78.58 636 78.08 78.70 78.60 634 78.29 78.35 78.74 632 78.22 78.60 78.55 630 77.89 78.67 78.72 628 78.11 78.73 78.65 626 77.94 78.82 78.63 624 78.10 78.74 78.66 622 78.30 78.77 78.76 620 78.21 78.68 78.72 618 78.19 78.63 78.72 616 78.22 78.76 78.64 614 78.09 78.65 78.59 612 78.09 78.57 78.65 610 78.25 78.62 78.70 608 78.20 78.61 78.70 606 78.13 78.61 78.57 604 78.14 78.80 78.56 602 78.01 78.57 78.58 600 77.94 78.49 78.61 598 78.05 78.68 78.72 596 78.14 78.61 78.58 594 78.31 78.69 78.56 592 77.95 78.71 78.67 590 77.94 78.72 78.68 588 77.99 78.78 78.61 586 78.09 78.68 78.56 584 78.04 78.62 78.55 582 78.06 78.74 78.62 580 78.00 78.67 78.72 578 77.86 78.44 78.35 576 77.95 78.60 78.51 574 77.98 78.48 78.53 572 77.77 78.58 78.49 570 77.86 78.56 78.45 568 77.92 78.56 78.47 566 77.78 78.44 78.42 564 77.89 78.37 78.36 562 77.83 78.39 78.45 560 77.83 78.52 78.27 558 77.71 78.35 78.45 556 77.81 78.44 78.43 554 77.79 78.39 78.45 552 77.70 78.21 78.30 550 77.54 78.35 78.31 548 77.56 78.37 78.27 546 77.73 78.52 78.30 544 77.77 78.16 78.40 542 77.60 78.34 78.23 540 77.54 78.15 78.12 538 77.62 78.36 78.26 536 77.43 78.16 78.21 534 77.69 78.09 78.13 532 77.39 78.33 78.34 530 77.59 78.11 78.19 528 77.56 78.19 78.29 526 77.50 78.11 77.98 524 77.34 78.14 78.19 522 77.32 78.24 77.99 520 77.32 78.04 78.21 518 77.36 77.96 77.98 516 77.35 77.95 77.93 514 77.27 77.76 77.96 512 77.25 77.97 78.05 510 77.15 77.96 77.82 508 77.17 77.98 77.77 506 77.02 77.82 77.89 504 77.04 77.67 77.92 502 77.06 77.69 77.82 500 77.13 77.66 77.94 498 77.01 77.72 77.96 496 76.90 77.38 77.67 494 76.85 77.62 77.61 492 77.04 77.69 77.63 490 76.76 77.45 77.59 488 76.96 77.44 77.53 486 76.82 77.56 77.46 484 76.65 77.65 77.53 482 76.65 77.80 77.34 480 76.65 77.51 77.21 478 76.81 77.29 77.42 476 76.53 77.33 77.29 474 76.79 77.34 77.46 472 76.64 77.37 77.37 470 76.62 77.44 77.23 468 76.65 77.32 77.22 466 76.61 77.22 77.19 464 76.67 77.13 76.98 462 76.45 76.97 77.06 460 76.07 77.05 76.97 458 76.23 76.82 77.05 456 75.99 76.92 77.23 454 76.35 76.84 77.11 452 76.11 76.91 76.87 450 76.22 76.87 76.99 448 75.80 76.61 76.64 446 76.04 76.47 76.76 444 76.11 76.79 76.87 442 76.25 76.61 77.06 440 76.33 76.80 76.62 438 75.50 76.55 76.33 436 76.04 76.74 76.59 434 75.78 76.25 76.41 432 75.72 76.38 76.84 430 75.71 76.33 76.56 428 75.60 76.35 76.25 426 75.52 76.63 76.35 424 75.72 76.14 76.54 422 75.97 76.22 76.11 420 75.77 76.19 76.25 418 75.57 75.61 76.45 416 75.67 75.91 76.31 414 75.54 76.07 76.34 412 75.14 75.64 75.62 410 75.95 76.24 76.29 408 75.55 76.12 75.57 406 75.43 75.94 75.99 404 75.42 74.92 75.85 402 75.40 75.20 75.46 400 75.54 75.11 76.21 398 75.69 75.86 75.79 396 75.43 76.01 74.90 394 75.22 75.19 75.59 392 74.71 74.81 75.71 390 75.33 74.64 76.06 388 74.95 74.05 74.86 386 75.35 75.41 75.47 384 75.11 75.22 75.10 382 74.49 75.95 75.78 380 74.94 74.48 75.24 1650 89.64 90.07 89.85 1640 89.65 90.06 89.85 1630 89.65 90.08 89.86 1620 89.63 90.07 89.86 1610 89.62 90.06 89.84 1600 89.61 90.05 89.82 1590 89.59 90.03 89.83 1580 89.57 90.01 89.80 1570 89.55 89.99 89.78 1560 89.54 89.98 89.77 1550 89.51 89.94 89.75 1540 89.48 89.92 89.73 1530 89.45 89.90 89.71 1520 89.43 89.88 89.68 1510 89.40 89.84 89.66 1500 89.38 89.83 89.63 1490 89.35 89.78 89.61 1480 89.31 89.76 89.57 1470 89.28 89.72 89.55 1460 89.25 89.70 89.52 1450 89.22 89.67 89.49 1440 89.18 89.63 89.46 1430 89.15 89.60 89.42 1420 89.11 89.56 89.39 1410 89.08 89.53 89.36 1400 89.03 89.48 89.33 1390 89.00 89.45 89.28 1380 88.95 89.41 89.24 1370 88.90 89.36 89.21 1360 88.87 89.33 89.16 1350 88.82 89.29 89.13 1340 88.77 89.24 89.09 1330 88.73 89.20 89.04 1320 88.68 89.14 88.99 1310 88.63 89.09 88.95 1300 88.57 89.05 88.90 1290 88.52 88.99 88.85 1280 88.47 88.94 88.80 1270 88.41 88.88 88.74 1260 88.34 88.83 88.69 1250 88.29 88.76 88.63 1240 88.22 88.71 88.56 1230 88.14 88.64 88.50 1220 88.07 88.56 88.43 1210 88.00 88.50 88.36 1200 87.93 88.42 88.29 1190 87.84 88.33 88.21 1180 87.76 88.26 88.13 1170 87.66 88.17 88.05 1160 87.57 88.08 87.96 1150 87.49 87.98 87.87 1140 87.39 87.88 87.77 1130 87.27 87.78 87.66 1120 87.16 87.65 87.54 1110 87.02 87.53 87.44 1100 86.91 87.41 87.30 1090 86.75 87.28 87.16 1080 86.61 87.12 87.02 1070 86.45 86.96 86.86 1060 86.28 86.80 86.69 1050 86.10 86.62 86.51 1040 85.89 86.41 86.32 1030 85.68 86.20 86.10 1020 85.45 85.97 85.88 1010 85.20 85.73 85.62 1000 84.93 85.45 85.35 990 84.62 85.16 85.04 980 84.28 84.82 84.73 970 83.92 84.44 84.37 960 83.53 84.06 83.95 950 83.07 83.61 83.51