benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 obsi Obsidian_1992_USGS, 2015-04-30,  SKW ,  USGS ,  TRIMBLE 5700,  0220320138,  2.01,  TRM41249.00,  60194583,  NONE, 0.716, 0.7791, 15, 222045
 obsi Obsidian_1992_USGS, 2015-05-03,  SKW ,  USGS ,  TRIMBLE 5700,  0220320138,  2.01,  TRM41249.00,  60194583,  NONE, 0.716, 0.7791, 15, 30
 obsi Obsidian_1992_USGS, 1998-07-22,  CHS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936E_C,  CR16116,  NONE, 1.3197, 1.3678, 30, 140
 obsi Obsidian_1992_USGS, 1998-07-23,  CHS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936E_C,  CR16116,  NONE, 1.3197, 1.3678, 30, 30
 obsi Obsidian_1992_USGS, 2002-07-09,  CHS ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992805,  NONE, 1.1803, 1.2299, 30, 16190
 obsi Obsidian_1992_USGS, 2002-07-10,  CHS ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992805,  NONE, 1.1803, 1.2299, 30, 10
 obsi Obsidian_1992_USGS, 2002-07-11,  CHS ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992805,  NONE, 1.1803, 1.2299, 30, 10
 obsi Obsidian_1992_USGS, 2002-07-12,  CHS ,  USGS ,  ASHTECH,  04597 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992805,  NONE, 1.1803, 1.2299, 30, 10
 obsi Obsidian_1992_USGS, 2005-07-24,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 1.239, 1.2879, 30, 0
 obsi Obsidian_1992_USGS, 2005-07-25,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 1.239, 1.2879, 30, 0
 obsi Obsidian_1992_USGS, 2005-07-26,  CHS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE21,  ASH701945E_M,  CR620022601,  NONE, 1.239, 1.2879, 30, 0
 obsi Obsidian_1992_USGS, 2007-07-17,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2005, 1.2499, 30, 14580
 obsi Obsidian_1992_USGS, 2007-07-18,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2005, 1.2499, 30, 0
 obsi Obsidian_1992_USGS, 2007-07-19,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2005, 1.2499, 30, 0
 obsi Obsidian_1992_USGS, 2007-07-20,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14329,  NONE, 1.2005, 1.2499, 30, 0
 obsi Obsidian_1992_USGS, 2009-07-18,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.8867, 0.9409, 30, 1750
 obsi Obsidian_1992_USGS, 2009-07-19,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.8867, 0.9409, 30, 0
 obsi Obsidian_1992_USGS, 2009-07-20,  JMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR620022601,  NONE, 0.8867, 0.9409, 30, 0
 obsi Obsidian_1992_USGS, 2011-08-10,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.7679, 0.8249, 15, 15745
 obsi Obsidian_1992_USGS, 2011-08-11,  JLS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14333,  NONE, 0.7679, 0.8249, 15, 0
 obsi Obsidian_1992_USGS, 2013-07-09,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 0.8366, 0.8919, 15, 145845
 obsi Obsidian_1992_USGS, 2013-07-10,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 0.8366, 0.8919, 15, 0
 obsi Obsidian_1992_USGS, 2013-07-11,  JLS ,  USGS ,  JAVAD,  00588 ,  TRE_G3TH SIGMA3.3.1,  ASH701945E_M,  CR620022601,  NONE, 0.8366, 0.8919, 15, 0
 obsi Obsidian_1992_USGS, 2015-05-01,  SKW ,  USGS ,  TRIMBLE,  0220320138 ,  5700 2.01,  TRM41249.00,  60194583,  NONE, 0.716, 0.7791, 15, 30
 obsi Obsidian_1992_USGS, 2015-05-02,  SKW ,  USGS ,  TRIMBLE,  0220320138 ,  5700 2.01,  TRM41249.00,  60194583,  NONE, 0.716, 0.7791, 15, 30