benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 gill, 2001-06-11,  SKW ,  USGS ,  ASHTECH,  4600 ,  Z-XII3 CD00,  ASH701945B_M,  CR519993703,  NONE, 1.3984, 1.4458, 30, 10
 gill GilB_1986_USGS, 2003-04-03,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZC00,  ASH701945E_M,  CR620022601,  NONE, 0.5647, 0.6288, 30, 0
 gill GilB_1986_USGS, 2003-04-04,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZC00,  ASH701945E_M,  CR620022601,  NONE, 0.5647, 0.6288, 30, 0
 gill GilB_1986_USGS, 2003-04-05,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZC00,  ASH701945E_M,  CR620022601,  NONE, 0.5647, 0.6288, 30, 0
 gill GilB_1986_USGS, 2003-04-06,  JMS ,  USGS ,  ASHTECH,  ZE120023202 ,  Z-X ZC00,  ASH701945E_M,  CR620022601,  NONE, 0.5647, 0.6288, 30, 0
 gill GilB_1986_USGS, 2003-04-23,  JMS ,  USGS ,  ASHTECH,  04600 ,  Z-XII3 CD00,  ASH700936D_M,  CR14244,  NONE, 0.6149, 0.6769, 30, 15550
 gill GilB_1986_USGS, 2005-06-07,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.4136, 1.4609, 30, 15590
 gill GilB_1986_USGS, 2005-06-08,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.4136, 1.4609, 30, 0
 gill GilB_1986_USGS, 2005-06-09,  JMS ,  USGS ,  ASHTECH,  ZE1200331006 ,  Z-X ZE21,  ASH700936D_M,  CR14341,  NONE, 1.4136, 1.4609, 30, 0
 gill GilB_1986_USGS, 2006-05-26,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3329, 1.3809, 30, 0
 gill GilB_1986_USGS, 2006-05-27,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3319, 1.3799, 30, 0
 gill GilB_1986_USGS, 2006-05-28,  CHS ,  USGS ,  ASHTECH,  ZE120023204 ,  Z-X ZE21,  ASH701945B_M,  CR619992805,  NONE, 1.3309, 1.3789, 30, 0
 gill GilB_1986_USGS, 2017-05-09,  ELP ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7977, 0.8539, 15, 173045
 gill GilB_1986_USGS, 2017-05-10,  ELP ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7977, 0.8539, 15, 0
 gill GilB_1986_USGS, 2017-05-11,  ELP ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7977, 0.8539, 15, 0
 gill GilB_1986_USGS, 2017-05-13,  ELP ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7977, 0.8539, 15, 155215
 gill GilB_1986_USGS, 2017-05-14,  ELP ,  USGS ,  JAVAD,  01659 ,  TRE_G3TH SIGMA3.5.1,  ASH700936D_M,  CR14330,  NONE, 0.7977, 0.8539, 15, 0