# 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 2021-08-11 (1391 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 85.80 84.42 85.93 998 85.62 86.01 86.43 996 85.06 85.27 86.68 994 84.95 86.35 85.68 992 85.58 84.67 85.35 990 85.50 85.08 86.33 988 85.19 84.85 85.39 986 85.40 85.83 85.79 984 85.65 84.53 85.64 982 86.06 84.40 85.70 980 85.48 85.00 85.82 978 84.96 85.57 86.23 976 85.33 85.09 85.61 974 85.08 84.70 85.60 972 84.82 84.68 85.34 970 84.96 85.31 85.79 968 84.93 84.69 85.08 966 85.29 83.89 84.90 964 84.54 84.03 85.85 962 85.31 84.27 84.67 960 84.66 84.93 85.00 958 84.30 84.82 85.06 956 84.46 84.53 85.28 954 84.39 84.09 84.74 952 84.54 83.93 84.70 950 84.87 83.52 84.44 948 84.66 84.16 84.57 946 84.28 83.28 84.86 944 83.87 83.94 84.89 942 83.61 83.59 84.37 940 83.84 83.29 84.32 938 83.87 83.54 84.03 936 83.23 83.54 84.18 934 84.00 83.66 83.82 932 83.43 83.06 84.22 930 83.62 83.27 83.71 928 83.46 82.76 83.98 926 83.04 82.93 83.49 924 83.21 82.41 83.27 922 82.57 82.29 83.55 920 82.68 81.87 83.26 918 82.10 82.55 82.76 916 82.56 81.82 82.76 914 82.94 81.75 83.05 912 82.39 82.16 82.75 910 82.33 81.38 82.62 908 82.21 81.41 81.98 906 82.00 81.79 82.32 904 81.74 80.94 82.59 902 81.97 81.47 82.11 900 81.69 80.87 82.23 898 81.46 81.01 81.81 896 81.27 80.62 81.69 894 81.00 80.31 81.42 892 80.94 80.11 81.12 890 80.87 80.55 81.12 888 80.49 80.20 81.00 886 80.65 79.98 81.17 884 80.15 79.78 81.09 882 80.71 79.74 80.55 880 80.14 79.71 80.31 878 80.10 79.25 80.16 876 79.59 79.07 80.33 874 79.64 78.98 79.85 872 79.24 78.75 79.90 870 79.72 78.78 80.08 868 79.20 78.67 79.73 866 79.13 78.38 79.42 864 79.10 78.56 79.34 862 78.91 78.46 79.07 860 78.64 78.10 79.27 858 78.66 77.83 78.85 856 78.63 78.06 78.76 854 78.10 77.81 78.56 852 78.27 77.73 78.75 850 78.09 77.70 78.30 848 78.02 77.40 78.51 846 78.29 77.28 78.08 844 77.98 77.24 78.35 842 77.73 76.95 78.05 840 77.54 76.71 77.98 838 77.55 76.85 78.15 836 77.72 76.93 77.90 834 77.87 76.83 77.91 832 77.15 76.81 78.15 830 77.44 76.82 77.23 828 77.75 76.99 77.43 826 77.01 77.02 77.64 824 77.63 76.58 77.91 822 77.38 76.93 77.86 820 77.32 76.79 77.69 818 77.59 76.91 77.62 816 77.46 76.66 77.82 814 77.11 76.77 77.87 812 77.42 76.79 77.79 810 77.55 77.08 77.81 808 77.57 76.95 78.00 806 77.58 76.83 77.63 804 77.55 77.18 78.00 802 77.72 77.03 77.86 800 77.33 76.89 78.06 798 77.58 77.04 78.37 796 77.54 77.22 77.94 794 77.98 77.11 78.00 792 77.58 77.28 78.41 790 77.60 77.54 78.17 788 77.98 77.47 78.43 786 78.01 77.40 78.48 784 77.91 77.62 78.55 782 78.26 77.28 78.87 780 78.22 77.81 78.51 778 78.54 77.51 78.72 776 78.30 77.69 78.66 774 78.57 77.87 78.69 772 78.64 77.82 78.63 770 78.57 77.69 78.62 768 78.58 77.95 78.64 766 78.76 77.74 78.94 764 78.53 77.93 78.80 762 78.72 77.99 78.90 760 78.85 78.12 79.28 758 78.92 78.14 79.09 756 79.00 78.26 79.16 754 79.15 78.05 79.26 752 78.91 78.33 78.94 750 79.13 78.46 79.40 748 79.24 78.46 79.47 746 78.96 78.37 79.78 744 79.32 78.45 79.71 742 79.20 78.50 79.47 740 79.11 78.53 79.73 738 79.37 78.75 79.74 736 79.39 78.76 79.55 734 79.51 78.86 79.73 732 79.61 78.55 79.82 730 79.62 78.77 79.89 728 79.81 78.76 79.80 726 79.63 78.84 79.75 724 79.86 78.83 79.86 722 79.62 78.87 79.86 720 79.47 79.01 80.06 718 79.48 78.88 80.30 716 79.81 78.87 80.08 714 79.77 78.89 80.15 712 79.77 79.12 80.25 710 79.89 79.20 80.06 708 79.57 78.82 80.05 706 79.96 79.11 80.06 704 79.92 79.24 80.12 702 79.89 79.11 80.39 700 79.92 79.18 80.32 698 79.83 79.24 80.31 696 79.82 79.32 80.47 694 79.95 79.20 80.42 692 79.98 79.13 80.36 690 80.08 79.43 80.35 688 79.97 79.08 80.56 686 79.88 79.45 80.43 684 80.07 79.19 80.52 682 80.02 79.36 80.41 680 80.02 79.35 80.54 678 80.11 79.22 80.65 676 80.10 79.25 80.43 674 80.03 79.44 80.50 672 80.21 79.46 80.68 670 80.15 79.41 80.56 668 80.24 79.29 80.67 666 80.37 79.24 80.58 664 80.21 79.31 80.62 662 80.22 79.38 80.40 660 80.07 79.32 80.55 658 80.26 79.21 80.52 656 80.24 79.45 80.61 654 80.22 79.62 80.58 652 80.04 79.34 80.90 650 80.12 79.51 80.68 648 80.24 79.38 80.51 646 80.34 79.35 80.53 644 80.34 79.29 80.74 642 80.33 79.45 80.69 640 80.26 79.28 80.57 638 80.26 79.32 80.43 636 80.23 79.43 80.63 634 80.15 79.38 80.72 632 80.43 79.35 80.85 630 80.56 79.49 80.47 628 80.41 79.38 80.59 626 80.43 79.45 80.74 624 80.29 79.40 80.83 622 80.34 79.40 80.67 620 80.39 79.30 80.59 618 80.25 79.50 80.41 616 80.26 79.41 80.67 614 80.27 79.48 80.56 612 80.26 79.41 80.72 610 80.36 79.46 80.58 608 80.30 79.47 80.65 606 80.36 79.31 80.66 604 80.33 79.45 80.60 602 80.28 79.45 80.54 600 80.28 79.33 80.78 598 80.40 79.41 80.62 596 80.42 79.28 80.88 594 80.32 79.31 80.64 592 80.16 79.44 80.64 590 80.29 79.45 80.56 588 80.21 79.38 80.65 586 80.32 79.29 80.67 584 80.18 79.37 80.86 582 80.22 79.27 80.79 580 80.23 79.30 80.55 578 80.05 79.28 80.67 576 80.10 79.19 80.68 574 80.09 79.30 80.47 572 80.41 79.26 80.67 570 80.04 79.16 80.41 568 80.06 79.03 80.49 566 80.41 79.01 80.63 564 80.08 79.21 80.50 562 80.10 79.06 80.52 560 80.13 79.00 80.41 558 80.23 79.06 80.55 556 80.13 79.31 80.58 554 80.07 79.12 80.52 552 80.08 79.08 80.47 550 80.00 78.88 80.47 548 79.88 78.98 80.46 546 79.86 79.16 80.31 544 79.80 78.96 80.47 542 79.87 78.93 80.37 540 79.90 79.06 80.17 538 79.84 78.92 80.36 536 79.77 78.85 80.09 534 79.93 78.87 80.24 532 79.87 78.95 80.05 530 79.91 78.70 80.14 528 79.80 78.96 80.12 526 79.73 78.91 80.06 524 79.60 79.10 80.03 522 79.64 78.65 79.96 520 79.66 78.76 79.95 518 79.67 78.80 80.00 516 79.69 78.67 79.98 514 79.48 78.70 79.69 512 79.53 78.67 79.83 510 79.46 78.62 79.94 508 79.58 78.68 79.93 506 79.49 78.59 79.87 504 79.53 78.39 79.83 502 79.52 78.58 79.65 500 79.33 78.41 79.87 498 79.38 78.31 79.60 496 79.52 78.31 79.64 494 79.17 78.44 79.68 492 79.30 78.41 79.88 490 79.16 78.16 79.44 488 79.33 78.22 79.54 486 79.20 78.10 79.59 484 79.09 78.20 79.65 482 78.99 78.26 79.53 480 79.15 78.10 79.42 478 79.14 78.26 79.40 476 79.02 78.09 79.36 474 79.19 78.07 79.31 472 78.87 78.09 79.09 470 78.91 78.13 79.25 468 78.87 78.15 79.06 466 78.98 77.99 79.38 464 78.88 78.17 79.29 462 78.84 78.19 79.19 460 78.74 77.75 79.17 458 78.71 77.56 78.94 456 78.38 77.64 78.78 454 78.37 77.78 79.05 452 78.53 77.67 78.83 450 78.57 77.67 79.01 448 78.41 77.47 78.73 446 78.65 77.80 78.69 444 78.38 77.60 78.85 442 78.53 77.62 78.50 440 77.93 77.74 78.54 438 78.16 77.14 78.54 436 78.17 77.25 78.68 434 78.48 77.39 78.81 432 78.47 77.25 78.79 430 78.31 77.33 78.16 428 77.95 77.23 78.55 426 77.94 76.94 78.62 424 78.05 77.31 77.93 422 77.97 76.94 78.28 420 78.01 77.09 78.24 418 78.10 77.30 78.11 416 77.42 77.27 77.70 414 78.03 77.02 77.91 412 77.87 77.08 77.81 410 77.39 76.92 77.79 408 77.84 77.10 78.22 406 76.88 77.06 77.57 404 78.03 77.17 77.77 402 77.35 76.68 77.81 400 77.52 77.10 77.63 398 77.52 76.99 77.29 396 77.34 77.22 77.43 394 77.01 75.69 76.62 392 77.03 76.11 77.10 390 77.18 76.19 77.87 388 77.56 77.04 77.72 386 76.89 76.45 77.02 384 77.13 76.95 77.70 382 77.56 76.38 77.38 380 75.84 76.24 77.63 1650 91.14 90.96 91.44 1640 91.14 90.95 91.44 1630 91.14 90.96 91.45 1620 91.13 90.95 91.44 1610 91.12 90.93 91.45 1600 91.12 90.93 91.43 1590 91.09 90.92 91.42 1580 91.09 90.90 91.41 1570 91.07 90.87 91.39 1560 91.05 90.86 91.39 1550 91.03 90.82 91.37 1540 91.02 90.81 91.35 1530 90.99 90.77 91.33 1520 90.97 90.76 91.30 1510 90.94 90.72 91.29 1500 90.93 90.70 91.26 1490 90.89 90.66 91.24 1480 90.87 90.63 91.23 1470 90.84 90.60 91.19 1460 90.81 90.57 91.17 1450 90.78 90.53 91.15 1440 90.76 90.50 91.11 1430 90.71 90.46 91.08 1420 90.68 90.42 91.06 1410 90.66 90.39 91.02 1400 90.61 90.34 90.99 1390 90.58 90.30 90.95 1380 90.54 90.26 90.92 1370 90.49 90.21 90.89 1360 90.46 90.17 90.84 1350 90.42 90.12 90.80 1340 90.37 90.08 90.76 1330 90.33 90.03 90.72 1320 90.28 89.98 90.67 1310 90.24 89.92 90.62 1300 90.20 89.87 90.58 1290 90.14 89.81 90.54 1280 90.08 89.76 90.48 1270 90.03 89.69 90.44 1260 89.98 89.63 90.38 1250 89.91 89.57 90.31 1240 89.86 89.51 90.26 1230 89.79 89.44 90.20 1220 89.71 89.36 90.13 1210 89.65 89.28 90.06 1200 89.57 89.19 89.98 1190 89.49 89.12 89.91 1180 89.41 89.03 89.82 1170 89.32 88.93 89.75 1160 89.23 88.84 89.66 1150 89.14 88.74 89.56 1140 89.05 88.64 89.46 1130 88.94 88.52 89.36 1120 88.82 88.41 89.24 1110 88.72 88.28 89.12 1100 88.58 88.15 89.00 1090 88.44 88.00 88.86 1080 88.29 87.85 88.71 1070 88.14 87.69 88.56 1060 87.98 87.51 88.38 1050 87.79 87.33 88.21 1040 87.60 87.13 88.00 1030 87.40 86.90 87.80 1020 87.16 86.66 87.56 1010 86.90 86.39 87.30 1000 86.63 86.13 87.04 990 86.35 85.82 86.73 980 86.01 85.46 86.40 970 85.65 85.10 86.02 960 85.23 84.68 85.60 950 84.78 84.22 85.15