benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 down, 2003-09-12,  WCH ,  USGS ,  ASHTECH,  LP019992804 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.1793, 1.2289, 30, 15480
 down, 2003-09-13,  WCH ,  USGS ,  ASHTECH,  LP03175 ,  Z-XII3 CD00,  ASH700936E_C,  CR16376,  NONE, 1.2036, 1.2529, 30, 15550
 down Down_USGS, 2007-09-18,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 0.6596, 0.7199, 30, 142130
 down Down_USGS, 2007-09-19,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14330,  NONE, 0.6596, 0.7199, 30, 0
 down Down_USGS, 2015-09-11,  ELP ,  USGS ,  JAVAD,  00619 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  00488,  NONE, 0.7009, 0.7598, 15, 125715
 down Down_USGS, 2015-09-12,  SW ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR519993703,  NONE, 1.1945, 1.2439, 15, 144545