benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 grlk Garlock_Reset_1966_19, 1994-03-18,  KWC ,  USGS ,  ASHTECH LM-XII3,  764,  7A,  ASH700228A,  0598,  NONE, 1.2151, 1.2643, 30, 17430
 grlk Garlock_Reset_1966_19, 2006-04-19,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200526028,  ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.53, 0.5959, 30, 0
 grlk Garlock_Reset_1966_19, 2006-04-20,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200526028,  ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.53, 0.5959, 30, 0
 grlk Garlock_Reset_1966_19, 2006-04-21,  JLS ,  USGS ,  ASHTECH Z-X,  ZE1200526028,  ZE21,  ASH701945E_M,  CR620022605,  NONE, 0.53, 0.5959, 30, 0
 grlk Garlock_Reset_1966_19, 2011-07-16,  JMS ,  USGS ,  ASHTECH Z-X,  ZE120023202,  ZE210A13,  ASH700936D_M,  CR14341,  NONE, 0.771, 0.8279, 15, 165645
 grlk Garlock_Reset_1966_19, 2011-07-17,  JMS ,  USGS ,  ASHTECH Z-X,  ZE120023202,  ZE210A13,  ASH700936D_M,  CR14341,  NONE, 0.771, 0.8279, 15, 0
 grlk Garlock_Reset_1966_19, 2011-07-18,  JMS ,  USGS ,  ASHTECH Z-X,  ZE120023202,  ZE210A13,  ASH700936D_M,  CR14341,  NONE, 0.771, 0.8279, 15, 0