benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 g318, 2003-09-19,  JMS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.4681, 1.5149, 30, 14240
 g318, 2003-09-20,  JMS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.5164, 1.5629, 30, 14440
 g318 G318_1962_USC&GS, 2007-09-12,  JMS ,  USGS ,  ASHTECH,  LP020000801 ,  Z-XII 1L00,  ASH700936D_M,  CR14329,  NONE, 1.346, 1.3939, 30, 1550
 g318 G318_1962_USC&GS, 2007-09-14,  JMS ,  USGS ,  ASHTECH,  ZE120023208 ,  Z-X ZE21,  ASH701945B_M,  CR519993702,  NONE, 0.7689, 0.8258, 30, 163330
 g318 G318_1962_USC&GS, 2015-09-10,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.9,  ASH700936D_M,  CR14341,  NONE, 0.771, 0.8279, 15, 133415
 g318 G318_1962_USC&GS, 2015-09-11,  JLS ,  USGS ,  JAVAD,  01663 ,  TRE_G3TH SIGMA3.5.9,  ASH700936D_M,  CR14341,  NONE, 0.771, 0.8279, 15, 0