benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 mkim, 1994-11-12,  M. GINSKEY ,  UCLA ,  TRIMBLE 4000,  1051,  SST,  TRM14532.00,  271,  NONE, 1.1026, 0, 30, 18100
 mkim, 2000-08-29,  ZKS ,  UNIV CALIF LOS ANGEL,  ASHTECH Z-XII3,  107,  1L00,  ASH700936A_M,  782,  NONE, 1.0893, 0, 30, 12430
 mkim MKIM_stamped_MERC_19, 2010-03-29,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.2228, 1.2719, 15, 153615
 mkim MKIM_stamped_MERC_19, 2010-03-30,  CHS ,  USGS ,  ASHTECH,  ZE1200526043 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.1884, 1.2379, 15, 153445
 mkim MKIM_stamped_MERC_19, 2012-05-08,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 1.1904, 1.2399, 15, 154315
 mkim MKIM_stamped_MERC_19, 2012-05-10,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR620022605,  NONE, 1.1671, 1.2169, 15, 154045
 mkim MKIM_stamped_MERC_19, 2013-10-27,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.3541, 1.4019, 15, 161945
 mkim MKIM_stamped_MERC_19, 2013-11-07,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH700936D_M,  CR14244,  NONE, 1.2127, 1.2619, 15, 165015
 mkim MKIM_stamped_MERC_19, 2019-04-07,  ELP ,  USGS ,  JAVAD,  01658 ,  TRE_G3TH SIGMA3.5.1,  JAVRINGANT_DM,  00580,  NONE, 1.1823, 1.2319, 15, 14730
 mkim MKIM_stamped_MERC_19, 2019-04-24,  ELP ,  USGS ,  JAVAD,  01660 ,  TRE_G3TH SIGMA3.7.6,  JAVRINGANT_DM,  00488,  NONE, 1.1469, 1.1969, 15, 15570