benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 2dor 20_DOR_1975_USGS, 1993-07-13,  BDK ,  USGS ,  ASHTECH LM-XII3,  763,  7A26,  ASH700228A,  0718,  NONE, 1.2553, 1.3041, 30, 23160
 2dor 20_DOR_1975_USGS, 1992-08-15,  JMS ,  USGS ,  ASHTECH,  1104 ,  LM-XII3 7A,  ASH700228D,  1068,  NONE, 1.4614, 1.5083, 30, 19260
 2dor 20_DOR_1975_USGS, 1994-07-29,  BDK ,  USGS ,  ASHTECH,  623 ,  L-XII 7A,  ASH700228A,  683,  NONE, 1.1799, 1.2295, 30, 14310
 2dor 20_DOR_1975_USGS, 1998-07-25,  CHS ,  USGS ,  ASHTECH,  O4597 ,  Z-XII3 1E95,  ASH700936E_C,  CR16116,  NONE, 1.476, 1.5228, 30, 154030
 2dor 20_DOR_1975_USGS, 1998-07-26,  RCB ,  USGS ,  ASHTECH,  192 ,  Z-XII3 1F50,  ASH700936D_M,  CR14333,  NONE, 1.2368, 1.2858, 30, 163130
 2dor 20_DOR_1975_USGS, 1999-07-26,  ASH ,   ,  ASHTECH,  LP03464 ,  Z-XII3 CC00,  ASH701945B_M,  CR619992801,  NONE, 1.2227, 1.2718, 30, 154430
 2dor 20_DOR_1975_USGS, 1999-07-27,  JMS ,   ,  ASHTECH,  175 ,  Z-XII3 CB00,  ASH701945B_M,  CR619992804,  NONE, 1.5556, 1.6018, 30, 16410
 2dor 20_DOR_1975_USGS, 2002-07-15,  CHS ,  USGS ,  ASHTECH,  LP00108.707 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992805,  NONE, 1.3571, 1.4049, 30, 151030
 2dor 20_DOR_1975_USGS, 2002-07-16,  CWA ,  USGS ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993706,  NONE, 1.3157, 1.3638, 30, 15440
 2dor 20_DOR_1975_USGS, 2005-07-22,  CHS ,  USGS ,  ASHTECH,  04582 ,  Z-XII3 CD00,  ASH701945E_M,  CR520031615,  NONE, 1.3914, 1.4389, 30, 1590
 2dor 20_DOR_1975_USGS, 2005-07-23,  GDH ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH700936D_M,  CR14333,  NONE, 1.3713, 1.4189, 30, 154730
 2dor 20_DOR_1975_USGS, 2007-07-12,  CHS ,  USGS ,  ASHTECH,  LP03360 ,  Z-XII 1L00,  ASH701945B_M,  CR519993702,  NONE, 1.3713, 1.4189, 30, 15320
 2dor 20_DOR_1975_USGS, 2007-07-18,  GDH ,  USGS ,  ASHTECH,  04582 ,  Z-XII 1L00,  ASH701945E_M,  CR520031615,  NONE, 1.3975, 1.4449, 30, 164830
 2dor 20_DOR_1975_USGS, 2011-08-17,  CHS ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII 1L001,  ASH700936D_M,  CR14341,  NONE, 1.4519, 1.4988, 15, 153045
 2dor 20_DOR_1975_USGS, 2011-08-20,  CMS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945B_M,  CR519993703,  NONE, 1.4197, 1.4669, 15, 15815