image_groups[0] = new Image_group("1996.05.01_12", "2009.11.23_00", "ALL");
image_groups[1] = new Image_group("2001.03.01_00", "2001.05.30_12", "AR_9393");
image_groups[2] = new Image_group("2003.10.15_00", "2003.12.05_12", "AR_10486");
image_groups[3] = new Image_group("2005.08.15_00", "2005.10.31_12", "AR_10808");
image_groups[4] = new Image_group("1996.05.01_12", "1996.06.01_00", "1908-1909");
image_groups[5] = new Image_group("1996.05.05_00", "1996.06.28_00", "1909-1910");
image_groups[6] = new Image_group("1996.06.01_00", "1996.07.25_00", "1910-1911");
image_groups[7] = new Image_group("1996.06.28_00", "1996.08.22_00", "1911-1912");
image_groups[8] = new Image_group("1996.07.25_00", "1996.09.18_00", "1912-1913");
image_groups[9] = new Image_group("1996.08.22_00", "1996.10.15_00", "1913-1914");
image_groups[10] = new Image_group("1996.09.18_00", "1996.11.12_00", "1914-1915");
image_groups[11] = new Image_group("1996.10.15_00", "1996.12.09_00", "1915-1916");
image_groups[12] = new Image_group("1996.11.12_00", "1997.01.05_00", "1916-1917");
image_groups[13] = new Image_group("1996.12.09_00", "1997.02.01_00", "1917-1918");
image_groups[14] = new Image_group("1997.01.05_00", "1997.03.01_00", "1918-1919");
image_groups[15] = new Image_group("1997.02.01_00", "1997.03.28_00", "1919-1920");
image_groups[16] = new Image_group("1997.03.01_00", "1997.04.24_00", "1920-1921");
image_groups[17] = new Image_group("1997.03.28_00", "1997.05.22_00", "1921-1922");
image_groups[18] = new Image_group("1997.04.24_00", "1997.06.18_00", "1922-1923");
image_groups[19] = new Image_group("1997.05.22_00", "1997.07.15_00", "1923-1924");
image_groups[20] = new Image_group("1997.06.18_00", "1997.08.11_00", "1924-1925");
image_groups[21] = new Image_group("1997.07.15_00", "1997.09.08_00", "1925-1926");
image_groups[22] = new Image_group("1997.08.11_00", "1997.10.05_00", "1926-1927");
image_groups[23] = new Image_group("1997.09.08_00", "1997.11.01_00", "1927-1928");
image_groups[24] = new Image_group("1997.10.05_00", "1997.11.28_00", "1928-1929");
image_groups[25] = new Image_group("1997.11.01_00", "1997.12.26_00", "1929-1930");
image_groups[26] = new Image_group("1997.11.28_00", "1998.01.22_00", "1930-1931");
image_groups[27] = new Image_group("1997.12.26_00", "1998.02.18_00", "1931-1932");
image_groups[28] = new Image_group("1998.01.22_00", "1998.03.18_00", "1932-1933");
image_groups[29] = new Image_group("1998.02.18_00", "1998.04.14_00", "1933-1934");
image_groups[30] = new Image_group("1998.03.18_00", "1998.05.11_00", "1934-1935");
image_groups[31] = new Image_group("1998.04.14_00", "1998.06.07_00", "1935-1936");
image_groups[32] = new Image_group("1998.05.11_00", "1998.07.05_00", "1936-1937");
image_groups[33] = new Image_group("1998.06.07_00", "1998.08.01_00", "1937-1938");
image_groups[34] = new Image_group("1998.07.05_00", "1998.08.28_00", "1938-1939");
image_groups[35] = new Image_group("1998.08.01_00", "1998.09.24_00", "1939-1940");
image_groups[36] = new Image_group("1998.08.28_00", "1998.10.22_00", "1940-1941");
image_groups[37] = new Image_group("1998.09.24_00", "1998.11.18_00", "1941-1942");
image_groups[38] = new Image_group("1998.10.22_00", "1998.12.15_00", "1942-1943");
image_groups[39] = new Image_group("1998.11.18_00", "1999.01.12_00", "1943-1944");
image_groups[40] = new Image_group("1998.12.15_00", "1999.02.08_00", "1944-1945");
image_groups[41] = new Image_group("1999.01.12_00", "1999.03.07_00", "1945-1946");
image_groups[42] = new Image_group("1999.02.08_00", "1999.04.03_00", "1946-1947");
image_groups[43] = new Image_group("1999.03.07_00", "1999.05.01_00", "1947-1948");
image_groups[44] = new Image_group("1999.04.03_00", "1999.05.28_00", "1948-1949");
image_groups[45] = new Image_group("1999.05.01_00", "1999.06.24_00", "1949-1950");
image_groups[46] = new Image_group("1999.05.28_00", "1999.07.21_00", "1950-1951");
image_groups[47] = new Image_group("1999.06.24_00", "1999.08.18_00", "1951-1952");
image_groups[48] = new Image_group("1999.07.21_00", "1999.09.14_00", "1952-1953");
image_groups[49] = new Image_group("1999.08.18_00", "1999.10.11_00", "1953-1954");
image_groups[50] = new Image_group("1999.09.14_00", "1999.11.08_00", "1954-1955");
image_groups[51] = new Image_group("1999.10.11_00", "1999.12.05_00", "1955-1956");
image_groups[52] = new Image_group("1999.11.08_00", "2000.01.01_00", "1956-1957");
image_groups[53] = new Image_group("1999.12.05_00", "2000.01.28_00", "1957-1958");
image_groups[54] = new Image_group("2000.01.01_00", "2000.02.25_00", "1958-1959");
image_groups[55] = new Image_group("2000.01.28_00", "2000.03.23_00", "1959-1960");
image_groups[56] = new Image_group("2000.02.25_00", "2000.04.19_00", "1960-1961");
image_groups[57] = new Image_group("2000.03.23_00", "2000.05.17_00", "1961-1962");
image_groups[58] = new Image_group("2000.04.19_00", "2000.06.13_00", "1962-1963");
image_groups[59] = new Image_group("2000.05.17_00", "2000.07.10_00", "1963-1964");
image_groups[60] = new Image_group("2000.06.13_00", "2000.08.06_00", "1964-1965");
image_groups[61] = new Image_group("2000.07.10_00", "2000.09.03_00", "1965-1966");
image_groups[62] = new Image_group("2000.08.06_00", "2000.09.30_00", "1966-1967");
image_groups[63] = new Image_group("2000.09.03_00", "2000.10.27_00", "1967-1968");
image_groups[64] = new Image_group("2000.09.30_00", "2000.11.23_00", "1968-1969");
image_groups[65] = new Image_group("2000.10.27_00", "2000.12.21_00", "1969-1970");
image_groups[66] = new Image_group("2000.11.23_00", "2001.01.17_00", "1970-1971");
image_groups[67] = new Image_group("2000.12.21_00", "2001.02.13_00", "1971-1972");
image_groups[68] = new Image_group("2001.01.17_00", "2001.03.13_00", "1972-1973");
image_groups[69] = new Image_group("2001.02.13_00", "2001.04.09_00", "1973-1974");
image_groups[70] = new Image_group("2001.03.13_00", "2001.05.06_00", "1974-1975");
image_groups[71] = new Image_group("2001.04.09_00", "2001.06.02_00", "1975-1976");
image_groups[72] = new Image_group("2001.05.06_00", "2001.06.30_00", "1976-1977");
image_groups[73] = new Image_group("2001.06.02_00", "2001.07.27_00", "1977-1978");
image_groups[74] = new Image_group("2001.06.30_00", "2001.08.23_00", "1978-1979");
image_groups[75] = new Image_group("2001.07.27_00", "2001.09.19_00", "1979-1980");
image_groups[76] = new Image_group("2001.08.23_00", "2001.10.17_00", "1980-1981");
image_groups[77] = new Image_group("2001.09.19_00", "2001.11.13_00", "1981-1982");
image_groups[78] = new Image_group("2001.10.17_00", "2001.12.10_00", "1982-1983");
image_groups[79] = new Image_group("2001.11.13_00", "2002.01.07_00", "1983-1984");
image_groups[80] = new Image_group("2001.12.10_00", "2002.02.03_00", "1984-1985");
image_groups[81] = new Image_group("2002.01.07_00", "2002.03.02_00", "1985-1986");
image_groups[82] = new Image_group("2002.02.03_00", "2002.03.29_00", "1986-1987");
image_groups[83] = new Image_group("2002.03.02_00", "2002.04.26_00", "1987-1988");
image_groups[84] = new Image_group("2002.03.29_00", "2002.05.23_00", "1988-1989");
image_groups[85] = new Image_group("2002.04.26_00", "2002.06.19_00", "1989-1990");
image_groups[86] = new Image_group("2002.05.23_00", "2002.07.16_00", "1990-1991");
image_groups[87] = new Image_group("2002.06.19_00", "2002.08.13_00", "1991-1992");
image_groups[88] = new Image_group("2002.07.16_00", "2002.09.09_00", "1992-1993");
image_groups[89] = new Image_group("2002.08.13_00", "2002.10.06_00", "1993-1994");
image_groups[90] = new Image_group("2002.09.09_00", "2002.11.03_00", "1994-1995");
image_groups[91] = new Image_group("2002.10.06_00", "2002.11.30_00", "1995-1996");
image_groups[92] = new Image_group("2002.11.03_00", "2002.12.27_00", "1996-1997");
image_groups[93] = new Image_group("2002.11.30_00", "2003.01.23_00", "1997-1998");
image_groups[94] = new Image_group("2002.12.27_00", "2003.02.20_00", "1998-1999");
image_groups[95] = new Image_group("2003.01.23_00", "2003.03.19_00", "1999-2000");
image_groups[96] = new Image_group("2003.02.20_00", "2003.04.15_00", "2000-2001");
image_groups[97] = new Image_group("2003.03.19_00", "2003.05.13_00", "2001-2002");
image_groups[98] = new Image_group("2003.04.15_00", "2003.06.09_00", "2002-2003");
image_groups[99] = new Image_group("2003.05.13_00", "2003.07.06_00", "2003-2004");
image_groups[100] = new Image_group("2003.06.09_00", "2003.08.02_00", "2004-2005");
image_groups[101] = new Image_group("2003.07.06_00", "2003.08.30_00", "2005-2006");
image_groups[102] = new Image_group("2003.08.02_00", "2003.09.26_00", "2006-2007");
image_groups[103] = new Image_group("2003.08.30_00", "2003.10.23_00", "2007-2008");
image_groups[104] = new Image_group("2003.09.26_00", "2003.11.19_00", "2008-2009");
image_groups[105] = new Image_group("2003.10.23_00", "2003.12.17_00", "2009-2010");
image_groups[106] = new Image_group("2003.11.19_00", "2004.01.13_00", "2010-2011");
image_groups[107] = new Image_group("2003.12.17_00", "2004.02.09_00", "2011-2012");
image_groups[108] = new Image_group("2004.01.13_00", "2004.03.08_00", "2012-2013");
image_groups[109] = new Image_group("2004.02.09_00", "2004.04.04_00", "2013-2014");
image_groups[110] = new Image_group("2004.03.08_00", "2004.05.01_00", "2014-2015");
image_groups[111] = new Image_group("2004.04.04_00", "2004.05.28_00", "2015-2016");
image_groups[112] = new Image_group("2004.05.01_00", "2004.06.25_00", "2016-2017");
image_groups[113] = new Image_group("2004.05.28_00", "2004.07.22_00", "2017-2018");
image_groups[114] = new Image_group("2004.06.25_00", "2004.08.18_00", "2018-2019");
image_groups[115] = new Image_group("2004.07.22_00", "2004.09.14_00", "2019-2020");
image_groups[116] = new Image_group("2004.08.18_00", "2004.10.12_00", "2020-2021");
image_groups[117] = new Image_group("2004.09.14_00", "2004.11.08_00", "2021-2022");
image_groups[118] = new Image_group("2004.10.12_00", "2004.12.05_00", "2022-2023");
image_groups[119] = new Image_group("2004.11.08_00", "2005.01.02_00", "2023-2024");
image_groups[120] = new Image_group("2004.12.05_00", "2005.01.29_00", "2024-2025");
image_groups[121] = new Image_group("2005.01.02_00", "2005.02.25_00", "2025-2026");
image_groups[122] = new Image_group("2005.01.29_00", "2005.03.24_00", "2026-2027");
image_groups[123] = new Image_group("2005.02.25_00", "2005.04.21_00", "2027-2028");
image_groups[124] = new Image_group("2005.03.24_00", "2005.05.18_00", "2028-2029");
image_groups[125] = new Image_group("2005.04.21_00", "2005.06.14_00", "2029-2030");
image_groups[126] = new Image_group("2005.05.18_00", "2005.07.11_00", "2030-2031");
image_groups[127] = new Image_group("2005.06.14_00", "2005.08.08_00", "2031-2032");
image_groups[128] = new Image_group("2005.07.11_00", "2005.09.04_00", "2032-2033");
image_groups[129] = new Image_group("2005.08.08_00", "2005.10.01_00", "2033-2034");
image_groups[130] = new Image_group("2005.09.04_00", "2005.10.29_00", "2034-2035");
image_groups[131] = new Image_group("2005.10.01_00", "2005.11.25_00", "2035-2036");
image_groups[132] = new Image_group("2005.10.29_00", "2005.12.22_00", "2036-2037");
image_groups[133] = new Image_group("2005.11.25_00", "2006.01.18_00", "2037-2038");
image_groups[134] = new Image_group("2005.12.22_00", "2006.02.15_00", "2038-2039");
image_groups[135] = new Image_group("2006.01.18_00", "2006.03.14_00", "2039-2040");
image_groups[136] = new Image_group("2006.02.15_00", "2006.04.10_00", "2040-2041");
image_groups[137] = new Image_group("2006.03.14_00", "2006.05.08_00", "2041-2042");
image_groups[138] = new Image_group("2006.04.10_00", "2006.06.04_00", "2042-2043");
image_groups[139] = new Image_group("2006.05.08_00", "2006.07.01_00", "2043-2044");
image_groups[140] = new Image_group("2006.06.04_00", "2006.07.28_00", "2044-2045");
image_groups[141] = new Image_group("2006.07.01_00", "2006.08.25_00", "2045-2046");
image_groups[142] = new Image_group("2006.07.28_00", "2006.09.21_00", "2046-2047");
image_groups[143] = new Image_group("2006.08.25_00", "2006.10.18_00", "2047-2048");
image_groups[144] = new Image_group("2006.09.21_00", "2006.11.14_00", "2048-2049");
image_groups[145] = new Image_group("2006.10.18_00", "2006.12.12_00", "2049-2050");
image_groups[146] = new Image_group("2006.11.14_00", "2007.01.08_00", "2050-2051");
image_groups[147] = new Image_group("2006.12.12_00", "2007.02.04_00", "2051-2052");
image_groups[148] = new Image_group("2007.01.08_00", "2007.03.04_00", "2052-2053");
image_groups[149] = new Image_group("2007.02.04_00", "2007.03.31_00", "2053-2054");
image_groups[150] = new Image_group("2007.03.04_00", "2007.04.27_00", "2054-2055");
image_groups[151] = new Image_group("2007.03.31_00", "2007.05.24_00", "2055-2056");
image_groups[152] = new Image_group("2007.04.27_00", "2007.06.21_00", "2056-2057");
image_groups[153] = new Image_group("2007.05.24_00", "2007.07.18_00", "2057-2058");
image_groups[154] = new Image_group("2007.06.21_00", "2007.08.14_00", "2058-2059");
image_groups[155] = new Image_group("2007.07.18_00", "2007.09.10_00", "2059-2060");
image_groups[156] = new Image_group("2007.08.14_00", "2007.10.08_00", "2060-2061");
image_groups[157] = new Image_group("2007.09.10_00", "2007.11.04_00", "2061-2062");
image_groups[158] = new Image_group("2007.10.08_00", "2007.12.01_00", "2062-2063");
image_groups[159] = new Image_group("2007.11.04_00", "2007.12.29_00", "2063-2064");
image_groups[160] = new Image_group("2007.12.01_00", "2008.01.25_00", "2064-2065");
image_groups[161] = new Image_group("2007.12.29_00", "2008.02.21_00", "2065-2066");
image_groups[162] = new Image_group("2008.01.25_00", "2008.03.19_00", "2066-2067");
image_groups[163] = new Image_group("2008.02.21_00", "2008.04.16_00", "2067-2068");
image_groups[164] = new Image_group("2008.03.19_00", "2008.05.13_00", "2068-2069");
image_groups[165] = new Image_group("2008.04.16_00", "2008.06.09_00", "2069-2070");
image_groups[166] = new Image_group("2008.05.13_00", "2008.07.06_00", "2070-2071");
image_groups[167] = new Image_group("2008.06.09_00", "2008.08.03_00", "2071-2072");
image_groups[168] = new Image_group("2008.07.06_00", "2008.08.30_00", "2072-2073");
image_groups[169] = new Image_group("2008.08.03_00", "2008.09.26_00", "2073-2074");
image_groups[170] = new Image_group("2008.08.30_00", "2008.10.24_00", "2074-2075");
image_groups[171] = new Image_group("2008.09.26_00", "2008.11.20_00", "2075-2076");
image_groups[172] = new Image_group("2008.10.24_00", "2008.12.17_00", "2076-2077");
image_groups[173] = new Image_group("2008.11.20_00", "2009.01.13_00", "2077-2078");
image_groups[174] = new Image_group("2008.12.17_00", "2009.02.10_00", "2078-2079");
image_groups[175] = new Image_group("2009.01.13_00", "2009.03.09_00", "2079-2080");
image_groups[176] = new Image_group("2009.02.10_00", "2009.04.05_00", "2080-2081");
image_groups[177] = new Image_group("2009.03.09_00", "2009.05.03_00", "2081-2082");
image_groups[178] = new Image_group("2009.04.05_00", "2009.05.30_00", "2082-2083");
image_groups[179] = new Image_group("2009.05.03_00", "2009.06.26_00", "2083-2084");
image_groups[180] = new Image_group("2009.05.30_00", "2009.07.23_00", "2084-2085");
image_groups[181] = new Image_group("2009.06.26_00", "2009.08.20_00", "2085-2086");
image_groups[182] = new Image_group("2009.07.23_00", "2009.09.16_00", "2086-2087");
image_groups[183] = new Image_group("2009.08.20_00", "2009.10.13_00", "2087-2088");
image_groups[184] = new Image_group("2009.09.16_00", "2009.11.09_00", "2088-2089");
image_groups[185] = new Image_group("2009.10.13_00", "2009.11.23_00", "2089-2090");
n_groups = 186;