benchmark, date, observer, organization, receiver, receiver_sn, receiver_type, antenna, antenna_sn, dome, height (m), slant height (m), interval, first_observation (s)
 grn2 Granite_2_1934_USC&G, 1994-08-11,  JMS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 1.2815, 1.33, 30, 14260
 grn2 Granite_2_1934_USC&G, 1994-08-15,  JMS ,  USGS ,  ASHTECH,  763 ,  LM-XII3 7A,  ASH700228A,  0718,  NONE, 1.2976, 1.3459, 30, 143530
 grn2 Granite_2_1934_USC&G, 2001-08-15,  CHS ,   ,  ASHTECH,  lp019992809 ,  Z-XII3 CD00,  ASH700936D_M,  CR14341,  NONE, 1.1508, 1.2008, 30, 17590
 grn2 Granite_2_1934_USC&G, 2001-08-16,  JMS ,   ,  ASHTECH,  O4582 ,  Z-XII3 CD00,  ASH700936D_M,  CR14333,  NONE, 1.026, 1.0777, 30, 15500