benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 earn, 1995-09-17,  unknown ,  unknown ,  TRIMBLE 4000ST,  333,  4.81,  TRM14532.00,  137,  NONE, 0.9383, 0, 30, 1750
 EARN, 1995-09-26,  unknown ,  unknown ,  TRIMBLE 4000ST,  333,  4.81,  TRM14532.00,  10037,  NONE, 1.0376, 0, 30, 210
 earn, 1996-07-08,  GDH ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1389, 1.189, 30, 23730
 earn, 1996-07-09,  GDH ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1389, 1.189, 30, 0
 earn, 1996-07-10,  GDH ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1389, 1.189, 30, 0
 earn, 1996-07-11,  CHS ,  USGS ,  ASHTECH,  *LP00141 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1378, 1.1879, 30, 0
 earn, 1996-07-12,  CHS ,  USGS ,  ASHTECH,  *LP00141 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1378, 1.1879, 30, 30
 earn, 1996-07-13,  JMS ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1358, 1.186, 30, 0
 earn, 1996-07-14,  JMS ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1358, 1.186, 30, 0
 earn, 1996-07-15,  JLS ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1378, 1.1879, 30, 0
 earn, 1996-07-16,  JLS ,  USGS ,  ASHTECH,  143 ,  Z-XII3 1F00,  ASH700718B,  11401,  NONE, 1.1378, 1.1879, 30, 0
 earn Eagle_1958_USC&GS_(R, 2000-08-23,  JLS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993703,  NONE, 0.4305, 0.5024, 30, 30
 earn Eagle_1958_USC&GS_(R, 2000-08-24,  JLS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993703,  NONE, 0.4305, 0.5024, 30, 30
 earn Eagle_1958_USC&GS_(R, 2000-08-25,  JLS ,   ,  ASHTECH,  LP03360 ,  Z-XII3 CC00,  ASH701945B_M,  CR519993703,  NONE, 0.4305, 0.5024, 30, 30
 earn Eagle_1958_USC&GS_(R, 2004-05-20,  GDH ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.4124, 0.4857, 30, 0
 earn Eagle_1958_USC&GS_(R, 2004-05-21,  GDH ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.4124, 0.4857, 30, 0
 earn Eagle_1958_USC&GS_(R, 2004-05-22,  GDH ,  USGS ,  ASHTECH,  ZE120033802 ,  Z-X ZE00,  ASH700936D_M,  CR14329,  NONE, 0.4124, 0.4857, 30, 0