benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 grsh Grasshopper_1961_USC&, 1993-08-19,  CHS ,  USGS ,  ASHTECH LM-XII3,  1104,  7A,  ASH700228D,  1068,  NONE, 1.3137, 1.3619, 30, 195530
 grsh Grasshopper_1961_USC&, 1993-08-20,  CHS ,  USGS ,  ASHTECH LM-XII3,  1104,  7A,  ASH700228D,  1068,  NONE, 1.3137, 1.3619, 30, 195530
 grsh Grasshopper_1961_USC, 1992-05-06,  JLS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 6b,  ASH700228A,  1026,  NONE, 1.1678, 1.2176, 30, 14630
 grsh Grasshopper_1961_USC, 1992-05-07,  JLS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 6b,  ASH700228A,  1026,  NONE, 1.1487, 1.1987, 30, 13130
 grsh Grasshopper_1961_USC, 1992-06-12,  CHS ,  USGS ,  ASHTECH,  762 ,  LM-XII3 7A24,  ASH700228A,  0745,  NONE, 1.4191, 1.4663, 30, 2180
 grsh Grasshopper_1961_USC, 1994-08-22,  CHS ,  USGS ,  ASHTECH,  99 ,  LM-XII3 7A,  ASH700228D,  1036,  NONE, 1.379, 1.4266, 30, 21520
 grsh Grasshopper_1961_USC, 1994-09-14,  GDH ,  USGS ,  ASHTECH,  831 ,  LM-XII3 7A,  ASH700228A,  1027,  NONE, 1.3659, 1.4136, 30, 161030
 grsh Grasshopper_1961_USC, 2001-07-12,  GDH ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.2702, 1.3188, 30, 165430
 grsh Grasshopper_1961_USC, 2001-07-13,  GDH ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.2702, 1.3188, 30, 10
 grsh Grasshopper_1961_USC, 2001-07-14,  GDH ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH701945B_M,  CR619992801,  NONE, 1.2702, 1.3188, 30, 130
 grsh Grasshopper_1961_USC, 2004-07-17,  JMS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.5104, 1.5569, 30, 30
 grsh Grasshopper_1961_USC, 2004-07-18,  JMS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.5104, 1.5569, 30, 30
 grsh Grasshopper_1961_USC, 2004-07-19,  JMS ,  USGS ,  ASHTECH,  LP019992803 ,  Z-XII3 CD00,  ASH701945E_M,  CR620022601,  NONE, 1.5104, 1.5569, 30, 30