# 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 2021-10-20 (1461 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 85.02 85.57 84.94 998 85.79 85.62 85.04 996 84.78 85.75 85.75 994 85.47 87.15 86.07 992 84.69 85.98 84.91 990 85.42 85.47 85.58 988 85.55 85.82 85.61 986 85.14 85.09 85.70 984 84.90 86.04 85.81 982 84.95 85.42 85.77 980 84.82 85.27 85.03 978 84.77 86.00 85.23 976 84.58 84.87 84.62 974 85.09 85.62 85.15 972 85.20 84.91 84.68 970 84.33 85.04 84.75 968 84.87 85.23 85.15 966 84.55 85.66 85.28 964 84.49 85.14 84.65 962 84.05 85.43 85.27 960 84.62 84.59 85.17 958 84.69 85.02 84.77 956 84.55 84.40 84.40 954 84.08 84.93 84.64 952 84.28 84.88 84.12 950 83.95 84.22 84.00 948 84.32 84.32 84.45 946 84.22 83.78 84.31 944 83.89 84.49 83.98 942 84.13 83.88 83.69 940 83.98 83.89 83.93 938 83.85 83.73 83.77 936 83.45 83.82 83.71 934 82.78 83.55 83.79 932 83.11 83.82 83.32 930 83.10 83.12 83.11 928 83.15 83.33 83.19 926 82.38 83.49 82.82 924 82.53 82.98 82.84 922 82.57 83.00 82.96 920 82.76 82.95 82.80 918 82.37 82.65 82.52 916 82.73 82.41 82.64 914 81.89 82.67 82.50 912 82.21 82.42 82.41 910 81.84 82.37 82.08 908 81.56 82.23 82.05 906 81.77 81.96 82.11 904 81.19 81.79 81.84 902 80.87 81.80 81.65 900 81.10 81.66 81.17 898 81.21 81.36 80.98 896 81.07 81.26 81.01 894 80.86 81.03 81.05 892 80.80 80.81 81.04 890 80.46 80.59 80.84 888 79.94 80.70 80.52 886 79.67 80.39 80.43 884 80.16 80.66 80.53 882 79.65 80.08 80.42 880 79.84 80.28 79.81 878 79.36 79.94 80.08 876 79.29 79.73 79.45 874 79.18 79.73 79.57 872 78.99 79.92 78.87 870 78.84 79.52 79.15 868 78.78 79.18 78.90 866 78.46 78.94 78.99 864 78.39 78.73 78.98 862 78.24 78.97 78.53 860 78.31 78.91 78.20 858 78.02 78.87 78.45 856 78.19 78.32 78.49 854 77.68 78.17 77.87 852 77.87 78.16 77.84 850 77.80 78.29 77.92 848 77.67 77.81 77.70 846 77.00 78.26 77.76 844 77.20 78.03 77.53 842 77.00 77.74 77.36 840 77.01 77.95 77.31 838 77.23 77.73 77.13 836 76.98 77.52 77.72 834 76.88 77.44 77.04 832 76.83 77.33 77.28 830 76.83 77.54 77.50 828 77.12 77.55 77.39 826 76.87 77.20 76.98 824 76.53 77.50 77.09 822 76.95 77.23 76.77 820 76.57 77.32 77.35 818 76.95 77.42 76.94 816 76.98 77.41 77.45 814 76.72 77.23 77.02 812 76.65 77.26 76.89 810 76.83 77.29 76.92 808 76.91 77.54 77.42 806 77.27 77.47 77.31 804 77.37 77.43 77.27 802 76.96 77.69 77.47 800 77.25 77.68 77.39 798 77.20 77.65 77.41 796 76.96 77.49 77.28 794 76.94 77.72 77.42 792 77.32 77.87 77.70 790 77.14 77.60 77.52 788 77.66 77.84 77.56 786 77.46 77.71 77.97 784 77.39 77.83 77.75 782 77.45 78.30 78.08 780 77.90 78.35 77.99 778 77.76 78.21 78.08 776 77.67 78.24 78.01 774 78.09 78.18 78.11 772 77.59 78.32 78.20 770 77.66 78.58 78.13 768 77.96 78.35 78.46 766 78.05 78.38 78.32 764 78.02 78.52 78.38 762 77.82 78.66 78.54 760 78.17 78.66 78.46 758 78.20 78.73 78.49 756 78.33 78.79 78.83 754 78.21 79.07 78.78 752 78.52 78.87 78.76 750 78.45 78.93 78.96 748 78.62 79.01 78.94 746 78.59 79.04 78.93 744 78.82 78.99 79.00 742 78.73 79.22 79.00 740 78.71 79.30 79.01 738 78.64 79.20 79.15 736 78.71 79.49 79.15 734 78.84 79.16 79.30 732 78.94 79.40 79.31 730 79.16 79.44 79.19 728 78.91 79.63 79.33 726 78.84 79.51 79.26 724 78.95 79.48 79.14 722 78.89 79.53 79.37 720 79.02 79.36 79.63 718 79.06 79.47 79.46 716 79.04 79.67 79.47 714 79.06 79.77 79.55 712 79.45 79.73 79.49 710 79.12 79.71 79.52 708 79.24 79.85 79.63 706 79.17 79.67 79.59 704 79.28 79.54 79.41 702 79.38 79.92 79.49 700 79.21 79.87 79.66 698 79.15 79.70 79.65 696 79.35 79.89 79.49 694 79.23 79.87 79.79 692 79.30 79.68 79.60 690 79.28 79.75 79.81 688 79.28 79.90 79.84 686 79.65 80.04 79.76 684 79.48 79.99 79.80 682 79.51 79.91 79.73 680 79.43 79.96 79.95 678 79.55 80.05 79.79 676 79.43 79.93 79.99 674 79.48 80.09 79.78 672 79.48 80.00 79.83 670 79.67 80.14 80.05 668 79.50 80.04 79.87 666 79.53 80.06 80.05 664 79.72 80.03 79.90 662 79.64 79.97 79.79 660 79.52 80.00 79.79 658 79.54 80.06 79.94 656 79.69 80.05 79.84 654 79.52 80.02 80.05 652 79.70 80.12 79.88 650 79.66 80.33 79.97 648 79.52 80.13 79.97 646 79.60 80.12 79.92 644 79.61 80.13 79.99 642 79.61 80.31 80.04 640 79.68 80.21 80.06 638 79.64 80.25 79.91 636 79.66 80.32 79.98 634 79.66 80.20 80.01 632 79.52 80.46 79.97 630 79.69 80.17 79.89 628 79.71 80.21 79.90 626 79.65 80.15 79.90 624 79.48 80.21 80.05 622 79.74 80.14 79.95 620 79.42 80.08 80.01 618 79.62 80.06 79.94 616 79.56 80.36 80.16 614 79.71 80.21 79.80 612 79.58 80.27 79.98 610 79.81 80.05 80.02 608 79.54 80.24 79.96 606 79.55 80.15 79.91 604 79.75 80.08 80.17 602 79.46 80.13 80.15 600 79.54 80.08 80.06 598 79.63 79.98 79.90 596 79.63 80.02 79.80 594 79.55 80.20 79.99 592 79.42 80.07 79.89 590 79.38 79.99 79.85 588 79.44 80.15 79.91 586 79.68 79.86 79.90 584 79.37 79.98 79.95 582 79.41 80.24 79.89 580 79.51 79.95 79.79 578 79.33 79.82 79.82 576 79.42 79.92 79.80 574 79.49 79.81 79.67 572 79.43 79.81 79.71 570 79.34 79.85 79.73 568 79.46 79.76 79.60 566 79.48 79.86 79.71 564 79.36 79.75 79.66 562 79.40 79.83 79.79 560 79.48 79.84 79.69 558 79.34 79.63 79.68 556 79.22 79.69 79.78 554 79.22 79.79 79.74 552 79.28 79.68 79.58 550 79.21 79.68 79.44 548 79.17 79.58 79.58 546 79.33 79.61 79.52 544 79.15 79.57 79.48 542 78.97 79.59 79.59 540 79.24 79.55 79.72 538 78.94 79.52 79.66 536 79.00 79.65 79.44 534 78.88 79.65 79.35 532 78.98 79.43 79.43 530 78.84 79.56 79.43 528 78.96 79.38 79.29 526 78.68 79.17 79.30 524 78.95 79.32 79.23 522 78.87 79.46 79.42 520 78.73 79.36 79.39 518 78.76 79.22 79.23 516 78.78 79.18 79.12 514 78.71 79.29 79.11 512 78.70 79.25 79.18 510 78.68 79.14 79.16 508 78.74 79.37 79.22 506 78.72 79.21 79.15 504 78.79 79.11 78.92 502 78.39 79.27 79.22 500 78.58 79.29 79.15 498 78.71 79.16 79.06 496 78.43 79.13 79.08 494 78.51 78.90 79.15 492 78.48 79.02 79.15 490 78.32 79.10 78.81 488 78.27 79.10 78.71 486 78.31 78.66 78.92 484 78.42 78.77 78.72 482 78.22 78.63 79.19 480 78.18 78.91 78.79 478 78.19 78.89 78.69 476 78.26 78.53 78.56 474 77.99 78.82 78.60 472 78.28 78.55 78.52 470 78.02 78.72 78.38 468 78.22 78.68 78.28 466 77.97 78.51 78.37 464 77.72 78.41 78.29 462 77.94 78.32 78.29 460 77.94 78.11 78.29 458 77.73 78.19 78.22 456 77.75 78.39 78.19 454 77.54 78.41 78.03 452 77.46 78.19 78.25 450 77.80 78.10 78.10 448 77.52 78.12 78.13 446 77.79 78.00 78.07 444 77.60 78.05 77.85 442 77.47 78.13 77.76 440 77.60 77.96 77.83 438 77.41 77.97 77.70 436 77.94 77.70 77.52 434 77.86 77.92 77.45 432 77.24 77.84 77.62 430 77.49 77.63 77.89 428 77.31 77.65 78.15 426 77.09 77.62 77.66 424 76.84 77.16 77.78 422 77.33 77.36 77.47 420 77.44 77.40 77.11 418 77.21 76.92 77.14 416 77.12 77.49 77.45 414 76.62 77.17 77.66 412 77.02 77.02 77.20 410 76.71 76.84 77.82 408 77.17 76.77 76.87 406 76.45 76.56 77.00 404 76.94 77.19 76.78 402 76.98 76.49 76.60 400 76.20 76.68 76.83 398 76.94 77.02 77.53 396 76.70 77.10 76.71 394 76.29 76.10 76.54 392 76.59 76.28 76.83 390 75.85 76.33 76.41 388 76.24 75.69 76.85 386 75.67 75.62 75.81 384 75.54 75.91 75.26 382 75.16 76.53 76.31 380 76.60 75.96 76.72 1650 91.02 91.40 91.13 1640 91.01 91.40 91.12 1630 91.01 91.41 91.13 1620 91.01 91.41 91.13 1610 91.01 91.41 91.14 1600 90.98 91.41 91.13 1590 90.98 91.39 91.12 1580 90.97 91.38 91.10 1570 90.94 91.36 91.09 1560 90.95 91.35 91.07 1550 90.90 91.33 91.06 1540 90.90 91.32 91.04 1530 90.85 91.29 91.01 1520 90.85 91.27 91.00 1510 90.82 91.24 90.97 1500 90.79 91.23 90.95 1490 90.76 91.19 90.93 1480 90.74 91.17 90.89 1470 90.70 91.14 90.87 1460 90.68 91.11 90.85 1450 90.64 91.09 90.83 1440 90.61 91.05 90.80 1430 90.58 91.03 90.77 1420 90.55 91.00 90.73 1410 90.52 90.97 90.71 1400 90.47 90.94 90.66 1390 90.44 90.89 90.62 1380 90.40 90.86 90.59 1370 90.37 90.81 90.55 1360 90.32 90.78 90.51 1350 90.27 90.75 90.47 1340 90.24 90.71 90.43 1330 90.19 90.66 90.38 1320 90.13 90.61 90.33 1310 90.10 90.57 90.29 1300 90.04 90.52 90.24 1290 89.99 90.47 90.19 1280 89.95 90.43 90.14 1270 89.89 90.37 90.08 1260 89.83 90.32 90.03 1250 89.78 90.27 89.97 1240 89.71 90.20 89.90 1230 89.64 90.14 89.84 1220 89.58 90.07 89.77 1210 89.50 90.00 89.70 1200 89.41 89.92 89.62 1190 89.34 89.84 89.54 1180 89.26 89.77 89.45 1170 89.16 89.68 89.37 1160 89.07 89.58 89.28 1150 88.98 89.49 89.18 1140 88.87 89.39 89.09 1130 88.76 89.29 88.98 1120 88.65 89.17 88.87 1110 88.52 89.04 88.74 1100 88.39 88.92 88.61 1090 88.24 88.77 88.48 1080 88.10 88.63 88.35 1070 87.93 88.47 88.18 1060 87.76 88.30 88.02 1050 87.57 88.11 87.82 1040 87.36 87.90 87.63 1030 87.15 87.69 87.41 1020 86.91 87.45 87.18 1010 86.65 87.20 86.93 1000 86.37 86.90 86.65 990 86.06 86.61 86.34 980 85.72 86.26 86.01 970 85.34 85.89 85.64 960 84.93 85.46 85.23 950 84.48 85.01 84.77