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Table A.1

List of observers used for the RGO backbone.

Id Observer Start End Nd Md

332 RGO 1900 1976 28 124
341 Winkler, Jena 1882 1910 6161 2480
345 Konkoly, Ogyalla 1885 1905 3531 965
347 Stonyhurst College Obs. 1886 1935 4534 4338
352 Quimby, Philadelphia 1889 1921 10 860 7428
358 Mount Holyoke College 1890 1925 2799 2774
361 Schwab, Kremsmunster 1892 1909 3619 2060
362 Catania 1893 1918 7620 5417
366 Sykora, Charkow 1894 1910 1883 1248
368 Lewitzky, Jurjew 1895 1907 1279 647
370 Broger, Zurich 1896 1935 9492 8600
376 Woinoff, Moscow 1898 1919 2881 2758
378 Freyberg, St. Petersburg 1898 1903 530 393
380 Kleiner, Zobten 1899 1918 1965 1823
381 Kitschigin, Spitzbergen 1900 1900 102 102
382 Subbotin, St. Petersburg 1900 1908 1017 1017
383 Gorjatschy, Moscow 1901 1908 603 603
384 Larionoff, Mohilew 1901 1903 202 202
385 Struve, Charkow 1901 1902 179 179
386 Guillaume, Lyon 1902 1925 6340 6340
387 Schatkow, Kola 1902 1910 1057 1057
388 Messerschmitt, Munchen 1902 1910 1715 1715
389 Stempell, Hannover 1903 1925 2760 2760
390 Amherst College Observatory 1903 1906 672 672
392 Morosoff, Moscow 1904 1909 58 58
394 Wasnetzoff, Moscow 1905 1912 455 455
395 Belar, Laibach 1906 1906 144 144
396 Hrase, Prague 1906 1916 1748 1748
397 Brunner, Chur 1906 1906 127 127
398 Bodocs, Ogyalla 1906 1916 1674 1674
399 Ginori, Florence 1907 1907 114 114
402 Sykora, Taschkent 1907 1907 155 155
403 Biske, Zurich 1908 1909 377 377
405 Lucchini, Florence 1908 1914 1190 1190
406 Guerrieri, Capodimonte 1908 1910 943 943
407 Braak, Batavia 1909 1925 1586 1586
408 Stefko, Leysin 1909 1913 260 260
409 Schwarz, Kremsmunster 1910 1914 654 654
411 Kavan, Prague 1911 1913 771 771
412 Moye, Montpellier 1911 1925 4744 4744
413 Miloradowitsch, Pulkowo 1913 1914 143 143
414 Buttlar, Simsdorf 1914 1925 1898 1898
417 Bugoslawsky, Moscow 1916 1918 411 411
419 Reed, Kennebunk, Maine 1917 1917 33 33
427 Mt. Wilson, Full Disk 1923 1958 11 666 11 666
428 Brunner, Zurich 1926 1944 4901 4901
429 Buser, Arosa 1928 1937 2722 2722
431 Brunner, W., Zurich 1929 1944 3262 3262
432 N.A.O., Japan, k=0.75 1930 1930 244 244
433 N.A.O., Japan, k=0.65 1931 1934 920 920
434 N.A.O., Japan, k=0.70 1935 1948 1293 1293
436 Waldmeier, Zurich 1936 1947 1615 1615
437 N.A.O., Japan, k = 0.55 1936 1936 207 207
438 Protitch, M., Belgrade 1936 1954 3357 3357
439 N.A.O., Japan, k = 0.60 1937 1944 2059 2059
440 Rapp, Locarno-monti 1941 1944 1298 1298
441 Valencia Obs., Valencia 1920 1956 5734 5734
442 Waldmeier, Arosa 1942 1944 308 308
443 Djurkovic, P.M., Belgrade 1946 1946 159 159
444 Oskanjan, V., Belgrade 1947 1949 331 331
445 Koyama, H., Tokyo 1947 1996 9848 5746
446 U.S. Naval Observatory 1948 1956 3211 3211
447 National Astron. Obs., Japan 1949 1993 12 243 7689
448 Simic, M., Belgrade 1949 1950 158 158
449 Dizer, M., Kandilli Obs. 1949 1954 691 691
451 San Miguel Obs., Argentina 1952 1965 1274 1274
452 Ozguc, A., Kandilli Obs. 1955 1968 1931 1931
454 Rome Observatory 1958 1989 7104 4758
458 Dogan, N., Ankara 1974 1975 455 455
464 Luft, H. 1924 1988 10 628 7536
486 Athenes Eugenides, Greece 1967 1982 2386 1877
493 Athenes III, Elias, Greece 1949 1995 7611 4441
610 Luft 2, USA 1958 1988 4992 2662
612 Looks, Chile 1967 1987 3678 1906
655 Potsdam, Germany 1950 1999 5436 2740
658 Quezon, Philippines 1957 2010 10 606 3709
667 Roma 3, Italy 1950 2000 4213 654
671 Santiago, Chile 1957 2005 3781 1356
679 Skalnate, Slovakia 1950 2010 9200 4379
681 San Miguel, Argentina 1967 2010 9400 2402
701 Uccle, Belgium 1949 2010 13 283 5033
736 Cragg, T., Los Angeles 1947 2009 17 726 8900

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