benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 pigr PIGR_USGS, 2009-10-14,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.2137, 1.2629, 30, 15460
 pigr PIGR_USGS, 2009-10-15,  CHS ,  USGS ,  ASHTECH,  ZE1200331018 ,  Z-X ZE210,  ASH701945E_M,  CR520031626,  NONE, 1.1924, 1.2419, 30, 15460
 pigr PIGR_USGS, 2010-07-08,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.6554, 0.7158, 15, 154045
 pigr PIGR_USGS, 2010-07-11,  CHS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE210,  ASH701945B_M,  CR619992805,  NONE, 0.5888, 0.6519, 15, 155315
 pigr PIGR_USGS, 2012-06-26,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.6003, 0.6629, 15, 154815
 pigr PIGR_USGS, 2012-06-27,  CHS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.6097, 0.6719, 15, 153215
 pigr PIGR_USGS, 2013-04-18,  JMS ,  USGS ,  ASHTECH,  ZE1200526028 ,  Z-X ZE210,  ASH701945E_M,  CR520031622,  NONE, 0.7977, 0.8539, 15, 0
 pigr PIGR_USGS, 2013-04-22,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.7545, 0.8119, 15, 0
 pigr PIGR_USGS, 2013-04-23,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZE210,  ASH700936D_M,  CR14341,  NONE, 0.7545, 0.8119, 15, 0
 pigr PIGR_USGS, 2015-12-09,  ELP ,  USGS ,  JAVAD,  00624 ,  TRE_G3TH SIGMA3.3.1,  JAVRINGANT_DM,  01600,  NONE, 0.7504, 0.8078, 15, 16645
 pigr PIGR_USGS, 2016-04-28,  ELP ,  USGS ,  JAVAD,  01337 ,  TRE_G3TH SIGMA3.5.1,  ASH701945B_M,  CR619992805,  NONE, 1.2642, 1.3129, 15, 141945